|
Related Party Transactions (Narrative) (Details) (USD $)
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9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
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Sep. 30, 2014
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Dec. 31, 2013
|
Sep. 30, 2014
NBCUniversal Media, LLC [Member]
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Dec. 31, 2013
NBCUniversal Media, LLC [Member]
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Sep. 30, 2014
Nbcuniversal Holdings Preferred Stock [Member]
NBCUniversal Media, LLC [Member]
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Sep. 30, 2014
Carrying Value Of Related Party Contractual Obligation [Member]
NBCUniversal Media, LLC [Member]
|
Sep. 30, 2014
Comcast Corporation And NBCUniversal Media LLC Revolving Credit Agreement [Member]
NBCUniversal Media, LLC [Member]
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|
| Preferred stock liquidition preference value | $ 9,400,000,000 | ||||||
| Revolving Credit Agreement Capacity | 3,000,000,000 | ||||||
| Preferred stock dividend rate percentage | 8.25% | ||||||
| Borrowing margin for LIBOR based borrowings | 1.00% | ||||||
| Other noncurrent liabilities | $ 10,388,000,000 | $ 11,384,000,000 | $ 3,514,000,000 | $ 3,412,000,000 | $ 383,000,000 | ||