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Debt Debt (First Lien Term Loans) (Details) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2013
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Dec. 31, 2012
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| Debt Instrument [Line Items] | ||||||
| Long-term Debt | $ 11,112 | $ 10,750 | ||||
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First Lien Term Loans 2018 [Member]
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| Debt Instrument [Line Items] | ||||||
| Long-term Debt | 1,614 | 1,630 | ||||
| Debt Instrument, Interest Rate, Effective Percentage | 4.30% | [1] | 4.70% | [1] | ||
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First Lien Term Loan 2019 [Member]
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| Debt Instrument [Line Items] | ||||||
| Long-term Debt | 824 | 833 | ||||
| Debt Instrument, Interest Rate, Effective Percentage | 4.50% | [1] | 4.70% | [1] | ||
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2020 First Lien Term Loan [Member]
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| Debt Instrument [Line Items] | ||||||
| Long-term Debt | 390 | 0 | ||||
| Debt Instrument, Interest Rate, Effective Percentage | 4.30% | [1] | 0.00% | [1] | ||
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First Lien Term Loans [Member]
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| Debt Instrument [Line Items] | ||||||
| Long-term Debt | $ 2,828 | $ 2,463 | ||||
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