v2.4.0.8
Goodwill and Intangible Assets (Intangible Assets) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Franchise rights $ 59,364 $ 59,364
Accumulated amortization (8,874) (7,662)
Total 85,567 84,866
NBCUniversal Media, LLC [Member]
   
Accumulated amortization (4,003) (3,238)
Total 18,860 18,658
Customer relationships
   
Finite-lived intangible assets, gross carrying amount 15,037 14,970
Accumulated amortization (4,772) (3,971)
Weighted average original useful life 19 years 0 months 0 days  
Customer relationships | NBCUniversal Media, LLC [Member]
   
Finite-lived intangible assets, gross carrying amount 13,086 13,026
Accumulated amortization (2,982) (2,328)
Weighted average original useful life 19 years 0 months 0 days  
Software
   
Finite-lived intangible assets, gross carrying amount 4,271 3,795
Accumulated amortization (2,405) (2,123)
Weighted average original useful life 5 years 0 months 0 days  
Software | NBCUniversal Media, LLC [Member]
   
Finite-lived intangible assets, gross carrying amount 522 409
Accumulated amortization (240) (164)
Weighted average original useful life 5 years 0 months 0 days  
Other agreements and rights
   
Finite-lived intangible assets, gross carrying amount 1,433 1,414
Accumulated amortization (645) (609)
Weighted average original useful life 20 years 0 months 0 days  
Other agreements and rights | NBCUniversal Media, LLC [Member]
   
Finite-lived intangible assets, gross carrying amount 1,511 1,507
Accumulated amortization (781) (746)
Weighted average original useful life 21 years 0 months 0 days  
Trade names
   
Indefinite Lived Intangible Assets Excluding Goodwill 3,089 3,080
Trade names | NBCUniversal Media, LLC [Member]
   
Indefinite Lived Intangible Assets Excluding Goodwill 3,089 3,080
FCC Licenses
   
Indefinite Lived Intangible Assets Excluding Goodwill 652 636
FCC Licenses | NBCUniversal Media, LLC [Member]
   
Indefinite Lived Intangible Assets Excluding Goodwill 652 636
Cable franchise renewal costs and contractual operating rights [Member]
   
Finite-lived intangible assets, gross carrying amount 1,360 1,257
Accumulated amortization (745) (676)
Weighted average original useful life 10 years 0 months 0 days  
Patents and other technology rights [Member]
   
Finite-lived intangible assets, gross carrying amount 361 350
Accumulated amortization $ (307) $ (283)
Weighted average original useful life 9 years 0 months 0 days