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Long-Term Debt (Narrative) (Details) (USD $)
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3 Months Ended | 3 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2013
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Mar. 31, 2013
NBCUniversal Enterprise Senior Unsecured Debt Securities
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Mar. 31, 2013
Commercial Paper Program
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Mar. 31, 2013
NBCUniversal Enterprise Credit Facility
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Mar. 31, 2013
NBCUniversal Enterprise Preferred Stock
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Mar. 31, 2013
Senior 1.662% Notes Due 2018 [Member]
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Mar. 31, 2013
Senior 1.974% Notes Due 2019 [Member]
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Mar. 31, 2013
Floating Rate Senior Notes Due 2018 [Member]
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Mar. 31, 2013
Floating Rate Senior Notes Due 2016 [Member]
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Mar. 31, 2013
Senior 2.850% Notes Due 2023 [Member]
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Mar. 31, 2013
Senior 4.250% Notes Due 2033 [Member]
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Mar. 31, 2013
Senior 4.500% Notes Due 2043 [Member]
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Mar. 19, 2013
Prior NBCUniversal Credit Facility [Member]
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Mar. 31, 2013
NBCUniversal Enterprise Credit Facility [Member]
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| Long-term Debt, Fair Value | $ 54,300,000,000 | |||||||||||||
| Principal amount | 1,100,000,000 | 1,500,000,000 | 700,000,000 | 700,000,000 | 750,000,000 | 1,700,000,000 | 500,000,000 | |||||||
| Interest rate | 1.662% | 1.974% | 2.85% | 4.25% | 4.50% | |||||||||
| Debt Instrument, Maturity Date, Description | 2018 | 2019 | 2018 | 2016 | 2023 | 2033 | 2043 | March 2018 | ||||||
| Spread above LIBOR offered rate | 0.685% | 0.537% | ||||||||||||
| Total consideration transferred related to the Redemption Transaction and purchase of certain properties | 4,000,000,000 | 750,000,000 | 1,250,000,000 | 725,000,000 | ||||||||||
| Revolving credit facilities | 1,250,000,000 | |||||||||||||
| Credit facility borrowing capacity | 1,500,000,000 | 1,350,000,000 | ||||||||||||
| Amounts available under consolidated revolving credit facilities | 5,500,000,000 | 100,000,000 | ||||||||||||
| Credit facility interest rate | 1.28% | 1.28% | ||||||||||||
| Proceeds from commercial paper issued, net of repayments | $ 500,000,000 | |||||||||||||