|
Derivatives and Hedging (Details 2) (USD $)
In Millions, unless otherwise specified |
12 Months Ended |
|---|---|
|
Dec. 31, 2012
|
|
|
Shelf Drilling
|
|
| Effect on statement of operations resulting from changes in the fair values of derivatives designated as cash flow hedges | |
| Non-cash proceeds in the form of preference shares received in connection with sale transactions | $ 195 |
|
Nondesignated | Shelf Drilling
|
|
| Effect on statement of operations resulting from changes in the fair values of derivatives designated as cash flow hedges | |
| Number of embedded derivatives | 2 |
|
Nondesignated | Embedded derivatives | Other long-term liabilities
|
|
| Effect on statement of operations resulting from changes in the fair values of derivatives designated as cash flow hedges | |
| Derivatives at fair value | $ 2 |