Defined Benefit Plans [Domain]
Nonqualified Plans, Including Postretirement Health Care Benefits [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
2006-01-29 - 2007-02-03
Defined Benefit Plan Disclosure [Line Items]Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components0
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components0
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation9,000,000
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation(8,000,000)