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Derivative Instruments Derivative Instruments (Interest Rate Contracts - Fair Value Hedging Disclosures) (Details) (Fair Value Hedging [Member], Interest Rate Swap [Member], USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Jun. 01, 2012
Fixed Rate 6.90% Notes Due July 2017 [Member]
   
Derivative [Line Items]    
Derivative, Notional Amount $ 100 $ 175
Gain On Terminated Derivatives Recorded In Interest Expense   14
Fixed Rate 8.50% Notes Due June 2019 [Member]
   
Derivative [Line Items]    
Derivative, Notional Amount $ 100