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Derivatives and Hedging (Cash Flow Hedges - Location and Amount of Pretax Recognized in Comprehensive Income) (Details) (Designated As Hedging Instrument [Member], USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
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Sep. 30, 2013
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Total Pretax Gains (Losses) Recorded in AOCI | $ (6) | $ (15) | $ 72 | |
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Interest Rate Contracts [Member]
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Pretax Gains (Losses) Recorded in AOCI, interest rate contracts | (6) | (15) | 71 | |
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Interest Rate Contracts [Member] | Interest Expense [Member]
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net | (2) | (7) | (2) | |
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Commodity Contracts [Member]
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Pretax Gains (Losses) Recorded in AOCI, interest rate contracts | ||||
| Pretax Gains (Losses) Recorded in AOCI, commodity contracts | $ 1 | |||