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Debt Senior Unsecured Notes (Details) (USD $)
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3 Months Ended | 9 Months Ended | 3 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
Senior Unsecured Notes 2023 [Member]
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Dec. 31, 2013
Senior Unsecured Notes 2023 [Member]
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Sep. 30, 2014
Senior Unsecured Notes 2025 [Member]
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Dec. 31, 2013
Senior Unsecured Notes 2025 [Member]
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Sep. 30, 2014
Unsecured Debt [Member]
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Dec. 31, 2013
Unsecured Debt [Member]
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Sep. 30, 2014
2019, 2020 and 2021 First Lien Notes [Member]
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| Debt Instrument [Line Items] | |||||||||||
| Debt Instrument, Face Amount | $ 1,250,000,000 | $ 1,550,000,000 | |||||||||
| Long-term Debt | 1,250,000,000 | 0 | 1,550,000,000 | 0 | 2,800,000,000 | 0 | |||||
| Debt Instrument, Interest Rate, Stated Percentage | 5.375% | 5.75% | |||||||||
| Deferred Finance Costs, Net | 42,000,000 | ||||||||||
| Debt Extinguishment costs | $ 340,000,000 | $ 0 | $ 341,000,000 | $ 68,000,000 | $ 340,000,000 | ||||||