|
Income Taxes (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
|
Sep. 30, 2014
|
Jun. 30, 2014
|
Sep. 30, 2014
|
|
| Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items] | |||
| Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound | $ 30 | $ 30 | |
| Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound | 150 | 150 | |
| Tax Settlement Gain (Loss) Noncash | 141 | 274 | |
| Tax Settlement Interest Gain (Loss) | 23 | 21 | |
| Estimated Tax Settlement Gain (Loss) Noncash, Range, Lower Limit | 90 | ||
| Estimated Tax Settlement Interest Gain (Loss) Noncash, Range, Lower Limit | $ 220 | ||