| 2007 | 2006 |
Defined Benefit Plans [Domain] | Pension Plans, Defined Benefit [Member] | United States Pension Plans, Qualified, Defined Benefit, [Member] | Defined Benefit Plan Disclosure [Line Items] | Defined Benefit Plan, Information about Plan Assets [Abstract] | Defined Benefit Plan, Assets, Target Allocations [Abstract] | | |
| Defined Benefit Plan, Equity Securities, Global,Target Allocation | 46% | |
Defined Benefit Plan, Equity Securities, Private, Target Allocation | 13% | |
Defined Benefit Plan, Fixed Income, Target Allocation | 24% | |
Defined Benefit Plan, Absolute Return, Target Allocation | 12% | |
Defined Benefit Plan, Commodities, Target Allocation | 5% | |
Defined Benefit Plan, Cash, Target Allocation | 0% | |
Defined Benefit Plan, Target Allocations, Total | 100% | |
Defined Benefit Plan, Weighted-Average Asset Allocations [Abstract] | | |
| Defined Benefit Plan, Equity Securities, Global | 45% | 57% |
Defined Benefit Plan, Equity Securities, Private | 16% | 12% |
Defined Benefit Plan, Fixed Income | 23% | 19% |
Defined Benefit Plan, Absolute Return | 11% | 9% |
Defined Benefit Plan, Commodities | 4% | 2% |
Defined Benefit Plan, Cash | 1% | 1% |
Defined Benefit Plan, Weighted-Average Asset Allocation, Total | 100% | 100% |
Other Postretirement Benefit Plans, Defined Benefit [Member] | United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Defined Benefit Plan Disclosure [Line Items] | Defined Benefit Plan, Information about Plan Assets [Abstract] | Defined Benefit Plan, Assets, Target Allocations [Abstract] | | |
| Defined Benefit Plan, Equity Securities, Global,Target Allocation | 69% | |
Defined Benefit Plan, Equity Securities, Private, Target Allocation | 18% | |
Defined Benefit Plan, Fixed Income, Target Allocation | 10% | |
Defined Benefit Plan, Absolute Return, Target Allocation | 2% | |
Defined Benefit Plan, Commodities, Target Allocation | 1% | |
Defined Benefit Plan, Cash, Target Allocation | 0% | |
Defined Benefit Plan, Target Allocations, Total | 100% | |
Defined Benefit Plan, Weighted-Average Asset Allocations [Abstract] | | |
| Defined Benefit Plan, Equity Securities, Global | 75% | 79% |
Defined Benefit Plan, Equity Securities, Private | 13% | 10% |
Defined Benefit Plan, Fixed Income | 9% | 10% |
Defined Benefit Plan, Absolute Return | 2% | 0% |
Defined Benefit Plan, Commodities | 1% | 0% |
Defined Benefit Plan, Cash | 0% | 1% |
Defined Benefit Plan, Weighted-Average Asset Allocation, Total | 100% | 100% |