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Summary of Significant Accounting Policies (Details) (USD $)
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12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] | |||
| Depreciation and amortization | $ 576,000,000 | $ 731,000,000 | $ 900,000,000 |
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Facilities and Equipment
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| Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] | |||
| Depreciation and amortization | 269,000,000 | 422,000,000 | 591,000,000 |
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Parent [Member]
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| Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] | |||
| Adjustments to Additional Paid In Capital, Reorganization | $ 13,500,000,000 | $ 9,100,000,000 | $ 9,000,000,000 |
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- Definition
Adjustments to Additional Paid In Capital, Reorganization No definition available.
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- Definition
The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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