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Income Taxes Income Tax Unusual or Infrequent Items (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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| Schedule of Income Tax Expense Benefit Unusual or Infrequent Items [Line Items] | ||||||||||||||||
| Tax Credits (1) | $ (2) | [1] | $ 0 | [1] | $ (2) | [1] | $ (22) | [1] | ||||||||
| Witholding Taxes (2) | (1) | [2] | 0 | [2] | (1) | [2] | 4 | [2] | ||||||||
| Other Change in Tax Reserves (3) | (3) | [3] | 0 | [3] | (6) | [3] | 1 | [3] | ||||||||
| Other Adjustments (4) | (3) | [4] | (3) | [4] | (4) | [4] | (2) | [4] | ||||||||
| Income Tax Expense (Benefit) associated with unusual or infrequent items | $ (9) | $ (3) | $ (13) | $ (19) | ||||||||||||
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