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Debt Obligations (Changes in Debt Obligations) (Details) (USD $)
In Millions, unless otherwise specified |
9 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2013
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Dec. 31, 2012
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| Debt Instrument [Line Items] | ||||||||||
| Total debt obligations | $ 2,718 | $ 1,976 | ||||||||
| Less current portion | (45) | (136) | ||||||||
| Total long-term debt obligations | 2,673 | 1,840 | ||||||||
| Proceed from term loan | 902 | |||||||||
| Payments, Conversions, Accretion and Other | (160) | |||||||||
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2.50% convertible senior notes due August 15, 2013 [Member]
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| Debt Instrument [Line Items] | ||||||||||
| Total debt obligations | 91 | [1] | ||||||||
| Payments, Conversions, Accretion and Other | (91) | [1] | ||||||||
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4.00% senior unsecured notes due January 15, 2015 [Member]
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| Debt Instrument [Line Items] | ||||||||||
| Total debt obligations | 399 | [2] | 399 | [2] | ||||||
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5.55% senior unsecured notes due January 15, 2020 [Member]
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| Debt Instrument [Line Items] | ||||||||||
| Total debt obligations | 598 | [2] | 598 | [2] | ||||||
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5.25% senior unsecured notes due January 16, 2018 [Member]
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| Debt Instrument [Line Items] | ||||||||||
| Total debt obligations | 368 | [2] | 368 | [2] | ||||||
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3.875% senior unsecured notes due June 7, 2021 [Member]
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| Debt Instrument [Line Items] | ||||||||||
| Total debt obligations | 811 | [2] | ||||||||
| Proceed from term loan | 782 | [2] | ||||||||
| Payments, Conversions, Accretion and Other | 29 | [2] | ||||||||
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$450 million senior unsecured term loan facility credit agreement due September 19, 2016 [Member]
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| Debt Instrument [Line Items] | ||||||||||
| Total debt obligations | 360 | [3] | 394 | [3] | ||||||
| Payments, Conversions, Accretion and Other | (34) | [3] | ||||||||
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$750 million revolving credit commitment due September 19, 2016 [Member]
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| Debt Instrument [Line Items] | ||||||||||
| Total debt obligations | 182 | [3] | 126 | [3] | ||||||
| Proceed from term loan | 120 | [3] | ||||||||
| Payments, Conversions, Accretion and Other | (64) | [3] | ||||||||
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Debt Current [Member]
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| Debt Instrument [Line Items] | ||||||||||
| Less current portion | (45) | (136) | ||||||||
| Payments, Conversions, Accretion and Other | 91 | |||||||||
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Debt Non Current [Member]
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| Debt Instrument [Line Items] | ||||||||||
| Total long-term debt obligations | 2,673 | 1,840 | ||||||||
| Proceed from term loan | 902 | |||||||||
| Payments, Conversions, Accretion and Other | $ (69) | |||||||||
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