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Long-Term Debt (Narrative) (Details) (USD $)
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3 Months Ended | 9 Months Ended | 0 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
7.5% Senior Secured Notes due 2019, net of original issue discount
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Sep. 30, 2014
3.125% Senior Secured Notes due 2019, net of original issue discount
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Mar. 18, 2014
3.125% Senior Secured Notes due 2019, net of original issue discount
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Sep. 30, 2014
7.375% Senior Secured Notes due 2020
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Sep. 30, 2014
5.125% Senior Secured Notes due 2022
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Sep. 30, 2014
4.375% Senior Secured Notes due 2023, net of original issue discount
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Sep. 30, 2014
4.85% Senior Secured Notes due 2024, net of original issue discount
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Mar. 18, 2014
4.85% Senior Secured Notes due 2024, net of original issue discount
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Sep. 30, 2014
4.45% Senior Secured Notes due 2025, net of original issue discount
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Aug. 21, 2014
4.45% Senior Secured Notes due 2025, net of original issue discount
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Sep. 30, 2014
5.45% Senior Secured Notes due 2034, net of original issue discount
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Aug. 21, 2014
5.45% Senior Secured Notes due 2034, net of original issue discount
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Sep. 30, 2014
5.95% Senior Secured Notes due 2043, net of original issue discount
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Oct. 03, 2014
Subsequent Event
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| Debt Instrument [Line Items] | ||||||||||||||||||
| Debt instrument, face amount | $ 400,000,000 | $ 600,000,000 | $ 600,000,000 | $ 400,000,000 | ||||||||||||||
| Debt instrument interest rate stated percentage | 7.50% | 3.125% | 3.125% | 7.375% | 5.125% | 4.375% | 4.85% | 4.85% | 4.45% | 4.45% | 5.45% | 5.45% | 5.95% | |||||
| Debt issuance price percentage | 99.828% | 99.927% | 99.86% | 99.784% | ||||||||||||||
| Loss on extinguishment of debt | 48,000,000 | 0 | 48,000,000 | 57,000,000 | ||||||||||||||
| Line of credit facility remaining borrowing capacity | 2,000,000,000 | 2,000,000,000 | ||||||||||||||||
| Line of credit facility interest rate at period end | 2.30% | 2.30% | ||||||||||||||||
| Line of credit facility, increase | $ 1,060,000,000 | |||||||||||||||||
| Debt weighted average interest rate | 5.00% | 5.00% | ||||||||||||||||