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Derivatives (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2013
Interest expense
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Jun. 30, 2012
Interest expense
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Jun. 30, 2013
Interest expense
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Jun. 30, 2012
Interest expense
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Jun. 30, 2013
Interest expense
Fair Value Hedging [Member]
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Jun. 30, 2012
Interest expense
Fair Value Hedging [Member]
|
Jun. 30, 2013
Interest expense
Fair Value Hedging [Member]
|
Jun. 30, 2012
Interest expense
Fair Value Hedging [Member]
|
Jun. 30, 2013
Interest rate risk on foreign currency denominated long-term borrowings
Interest expense
|
Jun. 30, 2012
Interest rate risk on foreign currency denominated long-term borrowings
Interest expense
|
Jun. 30, 2013
Interest rate risk on foreign currency denominated long-term borrowings
Interest expense
|
Jun. 30, 2012
Interest rate risk on foreign currency denominated long-term borrowings
Interest expense
|
Jun. 30, 2013
Interest rate risk on foreign currency denominated long-term borrowings
Interest expense
Fair Value Hedging [Member]
|
Jun. 30, 2012
Interest rate risk on foreign currency denominated long-term borrowings
Interest expense
Fair Value Hedging [Member]
|
Jun. 30, 2013
Interest rate risk on foreign currency denominated long-term borrowings
Interest expense
Fair Value Hedging [Member]
|
Jun. 30, 2012
Interest rate risk on foreign currency denominated long-term borrowings
Interest expense
Fair Value Hedging [Member]
|
Jun. 30, 2013
Commodity price risk on commodity inventory
Principal Transactions
|
Jun. 30, 2013
Commodity price risk on commodity inventory
Principal Transactions
|
Jun. 30, 2013
Commodity price risk on commodity inventory
Principal Transactions
Fair Value Hedging [Member]
|
Jun. 30, 2012
Commodity price risk on commodity inventory
Principal Transactions
Fair Value Hedging [Member]
|
Jun. 30, 2013
Commodity price risk on commodity inventory
Principal Transactions
Fair Value Hedging [Member]
|
Jun. 30, 2012
Commodity price risk on commodity inventory
Principal Transactions
Fair Value Hedging [Member]
|
Jun. 30, 2013
Long-term Borrowings [Member]
Fair Value Hedging [Member]
Designated as hedging instrument
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Dec. 31, 2012
Long-term Borrowings [Member]
Fair Value Hedging [Member]
Designated as hedging instrument
|
Jun. 30, 2013
Long-term Borrowings [Member]
Fair Value Hedging [Member]
Designated as hedging instrument
Trading Account Assets [Member]
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Dec. 31, 2012
Long-term Borrowings [Member]
Fair Value Hedging [Member]
Designated as hedging instrument
Trading Account Assets [Member]
|
Jun. 30, 2013
Long-term Borrowings [Member]
Fair Value Hedging [Member]
Designated as hedging instrument
Trading Liabilities [Member]
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Dec. 31, 2012
Long-term Borrowings [Member]
Fair Value Hedging [Member]
Designated as hedging instrument
Trading Liabilities [Member]
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Jun. 30, 2013
Commodity risk
Fair Value Hedging [Member]
Designated as hedging instrument
|
Dec. 31, 2012
Commodity risk
Fair Value Hedging [Member]
Designated as hedging instrument
|
Jun. 30, 2013
Commodity risk
Fair Value Hedging [Member]
Designated as hedging instrument
Trading Account Assets [Member]
|
Dec. 31, 2012
Commodity risk
Fair Value Hedging [Member]
Designated as hedging instrument
Trading Account Assets [Member]
|
Jun. 30, 2013
Commodity risk
Fair Value Hedging [Member]
Designated as hedging instrument
Trading Liabilities [Member]
|
Dec. 31, 2012
Commodity risk
Fair Value Hedging [Member]
Designated as hedging instrument
Trading Liabilities [Member]
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivative | $ (732) | [1] | $ 471 | [1] | $ (1,081) | [1] | $ 60 | [1] | $ (94) | [1] | $ (412) | [1] | $ (615) | [1] | $ (324) | [1] | $ 3 | [1] | $ (9) | [1] | $ 0 | [1] | $ 14 | [1] | ||||||||||||||||||||||||||||||||||||
| Hedged Item | 658 | [1],[2] | (645) | [1],[2] | 905 | [1],[2] | (371) | [1],[2] | 61 | [1],[2] | 345 | [1],[2] | 533 | [1],[2] | 230 | [1],[2] | (4) | [1],[2] | 9 | [1],[2] | (1) | [1],[2] | (14) | [1],[2] | ||||||||||||||||||||||||||||||||||||
| Hedge Ineffectiveness | (74) | [1] | (174) | [1] | (176) | [1] | (311) | [1] | (33) | [1] | (67) | [1] | (82) | [1] | (94) | [1] | (1) | [1] | (1) | [1] | ||||||||||||||||||||||||||||||||||||||||
| Fair Value Hedge Assets | 4,006 | 5,706 | 36 | 48 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Hedge Liabilities | 732 | 664 | 0 | 2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Notional Amount of Fair Value Hedge Instruments | $ 29,352 | $ 36,932 | $ 8,747 | $ 9,676 | $ 99 | $ 124 | $ 4 | $ 3 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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