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Derivative and Hedging Activities - Interest Income and Interest Expense Table (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Jun. 30, 2014
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Jun. 30, 2013
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Jun. 30, 2014
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Jun. 30, 2013
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| Trading Activity, Gains and Losses, Net [Line Items] | ||||
| Total interest expense | $ 27 | $ 104 | $ 66 | $ 124 |
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Interest Expense [Member]
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| Trading Activity, Gains and Losses, Net [Line Items] | ||||
| Interest expense on senior notes | 184 | 194 | 364 | 380 |
| Interest expense on term loans | 7 | 29 | 36 | 58 |
| Amortization of loan discount, issuance costs and other | 16 | 30 | 35 | 48 |
| Interest expense on credit facilities | 9 | 11 | 17 | 22 |
| Gains on terminated fair value hedges | (1) | (2) | (2) | (3) |
| (Gains) losses on undesignated interest rate derivatives | (33) | 52 | (51) | 57 |
| Capitalized interest | (155) | (210) | (333) | (438) |
| Total interest expense | $ 27 | $ 104 | $ 66 | $ 124 |