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Derivative Instruments and Hedging Activities (Details) - Mar. 31, 2012 - Derivatives designated as hedging instruments - Cash flow hedges - Interest Rate Swaps - 3 month LIBOR interest rate swap, cash flow hedge terminated March 2012 - USD ($) $ in Millions | Total
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Interest Rate Swap Agreements |
Debt issued | $ 400
Interest rate swap loss amortized as an increase to interest expense over the remaining term of the debt | 23
Other, net |
Interest Rate Swap Agreements |
Ineffective portion of the cash flow hedges | $ 2

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