v2.4.0.8

Commitments and Contingencies (Rental expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			1 Months Ended	11 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jan. 28, 2011 NBCUniversal Media, LLC [Member]	Dec. 31, 2011 NBCUniversal Media, LLC [Member]	Dec. 31, 2013 NBCUniversal Media, LLC [Member]	Dec. 31, 2012 NBCUniversal Media, LLC [Member]
Rent expense	$ 616	$ 688	$ 570	$ 18	$ 267	$ 250	$ 317

X

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration