Shareowners' Equity (Parenthetical) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		1 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jan. 31, 2011 NBC Universal [Member]	Sep. 26, 2010 NBC Universal [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of Entities Outstanding Shares Purchased from Minority Owner					12.30%	7.70%
Acquisition Payment For Remainder Of Non Controlling Ownership Interest					$ 3,673
Additional Acquisition Payment To Non Controlling Owner Related To Previously Purchased Shares					222
NBCU share repurchase	0	0	3,070	0	3,070
Impact On Non Controlling Interests Of Adoption Of ASC 810 Consolidations				28
Amount Paid In Excess Of Carrying Value Recorded As Basis Increase					$ 825