| Defined Benefit Plans [Domain] |
Other Postretirement Benefit Plans, Defined Benefit [Member] |
United States Postretirement Benefit Plans, Defined Benefit, Pre-65 [Member] | United States Postretirement Benefit Plans, Defined Benefit, Post-65 [Member] |
2007 | 2006 | 2007 | 2006 |
Defined Benefit Plan Disclosure [Line Items] | Defined Benefit Plan, Assumptions Used in Calculations [Abstract] | Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract] | | | | |
| Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year | 8.5% | 9% | 9.75% | 10.25% |
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate | 5% | 5% | 5% | 5% |
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate | 2015 | 2015 | 2015 | 2015 |