Series and Index [Domain]
						Fidelity Advisor New Insights Fund							S&P 500
						Share Class [Domain]							Share Class [Domain]
						group_C000016596C000016597C000016598C000016599					Institutional Class		group_C000016596C000016597C000016598C000016599	Institutional Class
						Class A	Class B	Class C	Class T
Prospectus [Line Items]
	Risk Return [Abstract]
		Risk Return [Heading]										Investment Summary
	Objective Section [Abstract]
		Objective [Heading]										Investment Objective
		Objective Primary [Text Block]										Advisor New Insights Fund seeks capital appreciation.
	Expenses [Abstract]
		Expense [Heading]								Fee Table	Fee Table
		Expense Narrative [Text Block]								The following table describes the fees and expenses that may be incurred when you buy, hold, or sell Class A, Class T, Class B, or Class C shares of the fund.	The following table describes the fees and expenses that may be incurred when you buy, hold, or sell Institutional Class shares of the fund.
	Shareholder Fees [Abstract]
		Shareholder Fees Caption								Shareholder fees (paid by the investor directly)	Shareholder fees (paid by the investor directly)
		Maximum Cumulative Sales Charge over Offering Price				5.75%	0%	0%	3.5%
		Maximum Deferred Sales Charge over Offering Price				0%	5%	1%	0%
		Maximum Deferred Sales Charge over Other									0%
		Maximum Sales Charge on Reinvested Dividends and Distributions over Other				0%	0%	0%	0%		0%
	Operating Expenses [Abstract]
		Operating Expenses Caption								Annual operating expenses (paid from class assets)	Annual operating expenses (paid from class assets)
		Net Expenses over Assets [Abstract]
			Expenses over Assets [Abstract]
				Management Fees over Assets		0.56%	0.56%	0.56%	0.56%		0.56%
				Distribution and Service (12b-1) Fees over Assets		0.25%	1%	1%	0.5%		0%
				Other Expenses over Assets [Abstract]
					Other Expenses over Assets	0.28%	0.33%	0.26%	0.25%		0.25%
				Expenses over Assets		1.09%	1.89%	1.82%	1.31%		0.81%
	Expense Example Narrative [Abstract]
		Expense Example Narrative [Text Block]								<P>This example helps you compare the cost of investing in the fund with the cost of investing in other mutual funds.</P> <P>Let's say, hypothetically, that each class's annual return is 5% and that your shareholder fees and each class's annual operating expenses are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:</P>	<P>This example helps you compare the cost of investing in the fund with the cost of investing in other mutual funds.</P> <P>Let's say, hypothetically, that Institutional Class's annual return is 5% and that your shareholder fees and Institutional Class's annual operating expenses are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:</P>
	Expense Example [Abstract]
		Expense Example Year 01				680	692	285	479		83
		Expense Example Year 03				902	894	573	751		259
		Expense Example Year 05				1,141	1,221	985	1,043		450
		Expense Example Year 10				1,827	1,905	2,137	1,874		1,002
		Expense Example No Redemption Year 01				680	192	185	479
		Expense Example No Redemption Year 03				902	594	573	751
		Expense Example No Redemption Year 05				1,141	1,021	985	1,043
		Expense Example No Redemption Year 10				1,827	1,905	2,137	1,874
	Strategy Section [Abstract]
		Strategy [Heading]										Principal Investment Strategies
		Strategy Narrative [Text Block]										<P>Normally investing primarily in common stocks.</P> <P>Investing in securities of companies whose value Fidelity Management & Research Company (FMR) believes is not fully recognized by the public.</P> <P>Investing in domestic and foreign issuers.</P> <P>Investing in either "growth" stocks or "value" stocks or both.</P> <P>Using fundamental analysis to select investments.</P>
	Risk Section [Abstract]
		Risk [Heading]										Principal Investment Risks
			Risk Lose Money									When you sell your shares they may be worth more or less than what you paid for them, which means that you could lose money.
			Risk Not Insured Depository Institution									An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
		Risk Narrative [Text Block]										<P>Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market can react differently to these developments.</P> <P>Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market.</P> <P>Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than the market as a whole and can perform differently from the value of the market as a whole.</P> <P>An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</P> <P>When you sell your shares they may be worth more or less than what you paid for them, which means that you could lose money.</P>
	Bar Chart and Performance Table Section [Abstract]
		Bar Chart and Performance Table [Heading]									Performance	Performance
			Performance Information Illustrates Variability of Returns								The information illustrates the changes in the fund's performance from year to year, as represented by the performance of Institutional Class, and compares Institutional Class's performance to the performance of a market index over various periods of time.	The information illustrates the changes in the fund's performance from year to year
			Performance Past Does Not Indicate Future								Returns (before and after taxes) are based on past results and are not an indication of future performance.	Returns (before and after taxes) are based on past results and are not an indication of future performance.
		Performance Narrative [Text Block]									The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the fund's performance from year to year, as represented by the performance of Class T, and compares each class's performance to the performance of a market index over various periods of time. Returns (before and after taxes) are based on past results and are not an indication of future performance.	The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the fund's performance from year to year, as represented by the performance of Class T, and compares each class's performance to the performance of a market index over various periods of time. Returns (before and after taxes) are based on past results and are not an indication of future performance.
	Bar Chart Narrative [Abstract]
		Bar Chart [Heading]							Year-by-Year Returns
		Bar Chart Narrative [Text Block]							The returns in the chart do not include the effect of Class T's front-end sales charge. If the effect of the sales charge were reflected, returns would be lower than those shown.
	Bar Chart Table [Abstract]
		Annual Return Caption							Advisor New Insights - Class T		Adviser New Insights - Institutional Class
		Annual Return 2004							18.6%		19.27%
		Annual Return 2005							18.7%		19.43%
		Annual Return 2006							10.9%		11.4%
		Annual Return 2007							20%		20.57%
	Bar Chart Closing [Abstract]
		Bar Chart Highest Quarterly Return							10.18%		10.28%
		Bar Chart Highest Quarterly Return Date							2004-12-31		2004-12-31
		Bar Chart Lowest Quarterly Return							(0.81%)		(0.68%)
		Bar Chart Lowest Quarterly Return Date							2006-06-30		2006-06-30
	Performance Narrative [Abstract]
		Performance Table [Heading]								Average Annual Returns	Average Annual Returns
			Performance Table Does Reflect Sales Loads							The returns in the following table include the effect of Class A's and Class T's maximum applicable front-end sales charge and Class B's and Class C's maximum applicable contingent deferred sales charge (CDSC).
Performance Table Uses Highest Federal Rate							After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.	After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.
Performance Table Not Relevant to Tax Deferred							The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement.	The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement.
Performance Table Explanation after Tax Higher							Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares. Actual after-tax returns may differ depending on your individual circumstances.	Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares. Actual after-tax returns may differ depending on your individual circumstances.
Performance Table Narrative [Text Block]								The returns in the following table include the effect of Class A's and Class T's maximum applicable front-end sales charge and Class B's and Class C's maximum applicable contingent deferred sales charge (CDSC). After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class T are shown in the table below and after-tax returns for other classes will vary. Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement.	After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement.
Average Annual Return Caption								For the periods ended December 31, 2007	For the periods ended December 31, 2007
Performance Table Section [Abstract]
	Average Annual Return Column Name
	Average Annual Return [Abstract]
		Average Annual Return Year 01			13.34%	14.24%	18.37%	15.8%		20.57%
		Average Annual Return Since Inception			18.34%	18.72%	19.05%	18.73%		20.32%
	Average Annual Return after Taxes on Distributions [Abstract]
		Average Annual Return after Taxes on Distributions Year 01						15.49%		20.17%
		Average Annual Return after Taxes on Distributions Since Inception						18.62%		20.15%
	Average Annual Return after Taxes on Distributions and Sales [Abstract]
		Average Annual Return after Taxes on Distributions and Sales Year 01						10.68%		13.9%
		Average Annual Return after Taxes on Distributions and Sales Since Inception						16.5%		17.93%
	Market Index Return [Abstract]
		Market Index Return Label										S&P 500(R) Index (reflects no deduction for fees, expenses, or taxes)	S&P 500(R) Index (reflects no deduction for fees, expenses, or taxes)
		Market Index Return Year 01										5.49%	5.49%
		Market Index Return Since Inception										11.35%	11.35%
Performance Table Closing [Abstract]
	Performance Table Closing [Text Block]	Performance Table Does Reflect Sales Loads							The returns in the following table include the effect of Class A's and Class T's maximum applicable front-end sales charge and Class B's and Class C's maximum applicable contingent deferred sales charge (CDSC).
		Performance Table Uses Highest Federal Rate							After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.	After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.
		Performance Table Not Relevant to Tax Deferred							The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement.	The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement.
		Performance Table Explanation after Tax Higher							Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares. Actual after-tax returns may differ depending on your individual circumstances.	Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares. Actual after-tax returns may differ depending on your individual circumstances.