Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Long-Term Asset Allocation Ranges) (Details)
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12 Months Ended |
---|---|
Dec. 31, 2011
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|
Minimum [Member]
|
|
Domestic and global equities | 36.00% |
Fixed income and convertible securities | 35.00% |
Hedge Funds | 9.00% |
Maximum [Member]
|
|
Domestic and global equities | 60.00% |
Fixed income and convertible securities | 60.00% |
Hedge Funds | 21.00% |