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Long-Term Debt (Narrative) (Details) (USD $)
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Jun. 30, 2014
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Dec. 31, 2013
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Jun. 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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Jun. 30, 2014
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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Mar. 04, 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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Jun. 30, 2014
7.375% Senior Secured Notes due 2020
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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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Jun. 30, 2014
5.125% Senior Secured Notes due 2022
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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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Jun. 30, 2014
4.375% Senior Secured Notes due 2023, net of original issue discount
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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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Jun. 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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Jun. 30, 2014
5.95% Senior Secured Notes due 2043, 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] | ||||||||||||||||||||||
| Debt instrument, face amount | $ 400,000,000 | $ 1,000,000,000 | $ 500,000,000 | $ 500,000,000 | $ 750,000,000 | $ 600,000,000 | $ 300,000,000 | |||||||||||||||
| Debt instrument interest rate stated percentage | 3.125% | 3.125% | 7.50% | 7.50% | 7.50% | 7.50% | 7.375% | 7.375% | 7.375% | 5.125% | 5.125% | 5.125% | 4.375% | 4.375% | 4.375% | 4.85% | 4.85% | 5.95% | 5.95% | 5.95% | ||
| Debt issuance price percentage | 99.828% | 98.278% | 99.968% | 99.927% | 99.973% | |||||||||||||||||
| Line of credit facility remaining borrowing capacity | $ 1,900,000,000 | $ 1,100,000,000 | ||||||||||||||||||||
| Line of credit facility interest rate at period end | 1.90% | 1.90% | ||||||||||||||||||||
| Debt weighted average interest rate | 5.50% | 5.00% |