|
Income Taxes Level 4 (Details) - Summary of the Valuation Allowance (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Valuation Allowance [Line Items] | |||
| Income Tax Expense (Benefit) | $ 26 | $ 349 | $ (384) |
| Deferred Tax Assets, Operating Loss Carryforwards, Domestic | 999 | ||
| Movement in Valuation Allowances and Reserves [Roll Forward] | |||
| Balance at Beginning of Period | 518 | 122 | 432 |
| Changes in Related Gross Deferred Tax Assets/Liabilities | 24 | (58) | 11 |
| Charge/Release | 46 | 454 | (321) |
| Balance at End of Period | 588 | 518 | 122 |
| Tax Credit Carryforward, Amount | 2 | ||
| Valuation allowance on state net operating loss carryforwards | 63 | ||
| Operating Loss Carryforwards, Valuation Allowance | 154 | ||
| Undistributed Earnings of Foreign Subsidiaries | $ 433 | ||