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Derivative Instruments and Hedging Activities - Part 2 (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Assets |  |
Derivative Assets, Gross | $ 105 | $ 100
Liabilities |  |
Derivative Liabilities, Gross | 655 | 657
Subect to netting arrangement |  |
Assets |  |
Derivative Assets, Gross | 19 | 25
Derivative Assets, Net | 11 | 16
Derivative Assets Not Offset By Collateral | 0 | 0
Derivative Assets Not Offset Under Netting Arrangements | (8) | (9)
Liabilities |  |
Derivative Liabilities, Gross | 520 | 522
Derivative Liabilities, Net | 498 | 508
Derivative Liabilities Not Offset By Collateral | (14) | (5)
Derivative Liabilities Not Offset Under Netting Arrangements | (8) | (9)
Noncurrent |  |
Assets |  |
Derivative Assets, Gross | 87 | 86
Liabilities |  |
Derivative Liabilities, Gross | 480 | 471
Current |  |
Assets |  |
Derivative Assets, Gross | 18 | 14
Liabilities |  |
Derivative Liabilities, Gross | 175 | 186
Designated as Hedging Instruments |  |
Assets |  |
Derivative Assets, Gross | 9 | 8
Liabilities |  |
Derivative Liabilities, Gross | 544 | 565
Not Designated as Hedging Instruments |  |
Assets |  |
Derivative Assets, Gross | 96 | 92
Liabilities |  |
Derivative Liabilities, Gross | 111 | 92
No longer carried at fair value |  |
Assets |  |
Derivative Assets, Gross | 181 | 186
Liabilities |  |
Derivative Liabilities, Gross | 191 | 191
Interest Rate Derivatives |  |
Assets |  |
Derivative Assets, Gross | 2 | 2
Liabilities |  |
Derivative Liabilities, Gross | 541 | 565
Interest Rate Derivatives | Designated as Hedging Instruments |  |
Assets |  |
Derivative Assets, Gross | 0 | 0
Liabilities |  |
Derivative Liabilities, Gross | 523 | 544
Interest Rate Derivatives | Not Designated as Hedging Instruments |  |
Assets |  |
Derivative Assets, Gross | 2 | 2
Liabilities |  |
Derivative Liabilities, Gross | 18 | 21
Cross Currency Swaps |  |
Assets |  |
Derivative Assets, Gross | 8 | 6
Liabilities |  |
Derivative Liabilities, Gross | 3 | 6
Cross Currency Swaps | Designated as Hedging Instruments |  |
Assets |  |
Derivative Assets, Gross | 8 | 6
Liabilities |  |
Derivative Liabilities, Gross | 3 | 6
Cross Currency Swaps | Not Designated as Hedging Instruments |  |
Assets |  |
Derivative Assets, Gross | 0 | 0
Liabilities |  |
Derivative Liabilities, Gross | 0 | 0
Foreign Currency |  |
Assets |  |
Derivative Assets, Gross | 88 | 81
Liabilities |  |
Derivative Liabilities, Gross | 18 | 14
Foreign Currency | Designated as Hedging Instruments |  |
Assets |  |
Derivative Assets, Gross | 1 | 0
Liabilities |  |
Derivative Liabilities, Gross | 7 | 7
Foreign Currency | Not Designated as Hedging Instruments |  |
Assets |  |
Derivative Assets, Gross | 87 | 81
Liabilities |  |
Derivative Liabilities, Gross | 11 | 7
Commodity & Other |  |
Assets |  |
Derivative Assets, Gross | 7 | 11
Liabilities |  |
Derivative Liabilities, Gross | 93 | 72
Commodity & Other | Designated as Hedging Instruments |  |
Assets |  |
Derivative Assets, Gross | 0 | 2
Liabilities |  |
Derivative Liabilities, Gross | 11 | 8
Commodity & Other | Not Designated as Hedging Instruments |  |
Assets |  |
Derivative Assets, Gross | 7 | 9
Liabilities |  |
Derivative Liabilities, Gross | $ 82 | $ 64

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