Assets and Liabilities of Businesses Held For Sale and Discontinued Operations (Held for Sale Narrative) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended								3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Jan. 28, 2011 NBC Universal [Member]	Jun. 30, 2012 NBCU LLC [Member]	Dec. 31, 2011 NBCU LLC [Member]	Jun. 30, 2012 Discontinued Operation or Asset Disposal [Member]	Dec. 31, 2011 Discontinued Operation or Asset Disposal [Member]	Mar. 31, 2011 Consumer RV Marine [Member]	Jun. 30, 2011 Consumer Mexico [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from sale of NBCU	$ 0	$ 4,371
Ownership Percentage In Newly Formed Entity				49.00%
Deferred Tax Liabilities					4,960	4,880
Equity Method Investment, Ownership Percentage	1.00%
Equity Method Investments					18,253	17,955
Deferred income taxes	456		(131)				230	205
Assets of businesses held for sale	3,039		711
Liabilities of businesses held for sale	283		345
Current receivables	19,295		19,531
Property, plant and equipment - net	66,660		65,739
Other assets, all	109,288		111,701
Accounts Payable, Current	16,718		16,400
Accrued Liabilities, Current	14,967		14,796
Other Liabilities	67,514		70,653				1,710	1,424
Consideration Received For Sale Of Business									$ 2,365	$ 1,943