Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Weighted Average Asset Allocations of the Pension Benefit Plans' Assets) (Details) - Pension Plans, Defined Benefit [Member] |
Dec. 31, 2015 |
Dec. 31, 2014 |
---|---|---|
Defined Benefit Plan, Actual Plan Asset Allocations | 100.00% | 100.00% |
Domestic Equity Securities [Member] | ||
Defined Benefit Plan, Actual Plan Asset Allocations | 35.00% | 36.00% |
Fixed income [Member] | ||
Defined Benefit Plan, Actual Plan Asset Allocations | 48.00% | 48.00% |
Other notes [Member] | ||
Defined Benefit Plan, Actual Plan Asset Allocations | 17.00% | 16.00% |