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Long-Term Debt and Interest Rate Swap Arrangements (Narrative) (Details) (USD $)
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12 Months Ended | 0 Months Ended | 0 Months Ended | |||||||||||||||||||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Mar. 31, 2013
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Mar. 01, 2013
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Apr. 17, 2013
7.125% Senior Secured Notes due 2017
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Mar. 18, 2013
7.125% Senior Secured Notes due 2017
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Mar. 04, 2013
7.125% Senior Secured Notes due 2017
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Dec. 31, 2013
7.125% Senior Secured Notes due 2017
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Mar. 23, 2010
7.125% Senior Secured Notes due 2017
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Mar. 18, 2013
7.5% Senior Secured Notes due 2019, net of original issue discount
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Mar. 04, 2013
7.5% Senior Secured Notes due 2019, net of original issue discount
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Dec. 31, 2013
7.5% Senior Secured Notes due 2019, net of original issue discount
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Sep. 25, 2009
7.5% Senior Secured Notes due 2019, net of original issue discount
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Dec. 31, 2013
7.375% Senior Secured Notes due 2020
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Mar. 23, 2010
7.375% Senior Secured Notes due 2020
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Dec. 31, 2013
5.125% Senior Secured Notes due 2022
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Jul. 02, 2012
5.125% Senior Secured Notes due 2022
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Dec. 31, 2013
4.375% Senior Secured Notes due 2023, net of original issue discount
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Mar. 18, 2013
4.375% Senior Secured Notes due 2023, net of original issue discount
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Dec. 31, 2013
5.95% Senior Secured Notes due 2043, net of original issue discount
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Mar. 18, 2013
5.95% Senior Secured Notes due 2043, net of original issue discount
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| Debt Instrument [Line Items] | ||||||||||||||||||||||
| Principal amount of tender offer | $ 500,000,000 | $ 250,000,000 | ||||||||||||||||||||
| Debt instrument interest rate stated percentage | 7.125% | 7.125% | 7.125% | 7.50% | 7.50% | 7.50% | 7.375% | 7.375% | 5.125% | 5.125% | 4.375% | 4.375% | 5.95% | 5.95% | ||||||||
| Total debt | 500,000,000 | 1,000,000,000 | 500,000,000 | 500,000,000 | 750,000,000 | 300,000,000 | ||||||||||||||||
| Extinguishment of debt amount | 376,000,000 | 124,000,000 | 231,000,000 | |||||||||||||||||||
| Repurchase price of individual bonds including premium | 1,035.63 | 1,039.40 | 1,120 | |||||||||||||||||||
| Face value of individual bonds repurchased | 1,000 | 1,000 | 1,000 | |||||||||||||||||||
| Debt issuance price percentage | 98.278% | 99.968% | 99.973% | |||||||||||||||||||
| Line of credit facility maximum borrowing capacity | 2,000,000,000 | |||||||||||||||||||||
| Line of credit facility standby letter of credit | 250,000,000 | |||||||||||||||||||||
| Line of credit facility uncommitted loan | 1,000,000,000 | |||||||||||||||||||||
| Debt instrument lower range of basis spread on variable rate | 0.25% | |||||||||||||||||||||
| Debt instrument higher range of basis spread on variable rate | 2.00% | |||||||||||||||||||||
| Line of credit facility remaining borrowing capacity | 1,100,000,000 | |||||||||||||||||||||
| Line of credit facility interest rate at period end | 1.90% | |||||||||||||||||||||
| Notional amount of interest rate derivative instruments not designated as hedging instruments | 3,100,000,000 | |||||||||||||||||||||
| Loss on extinguishment of debt | (57,000,000) | 0 | 0 | |||||||||||||||||||
| Debt weighted average interest rate | 5.00% | |||||||||||||||||||||
| Letters of Credit Outstanding, Amount | $ 26,000,000 | $ 30,000,000 | ||||||||||||||||||||