Assets and Liabilities of Businesses Held For Sale and Discontinued Operations (Narrative, Financial Information and NBCU) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended			9 Months Ended	0 Months Ended			12 Months Ended	3 Months Ended	9 Months Ended															3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 GEMB-Nordic	Mar. 19, 2013 NBCU LLC	Jul. 15, 2013 Portugal Consumer Auto Personal Loan	Dec. 02, 2013 Machining And Fabrication Business	Dec. 31, 2013 CLL Trailer Services	Mar. 31, 2014 Consumer Russia	Sep. 30, 2014 Appliances	Sep. 30, 2014 Cash and Cash Equivalents	Dec. 31, 2013 Cash and Cash Equivalents	Sep. 30, 2014 Inventories	Dec. 31, 2013 Inventories	Sep. 30, 2014 Loans and Finance Receivables	Dec. 31, 2013 Loans and Finance Receivables	Sep. 30, 2014 Property, Plant and Equipment, Net	Dec. 31, 2013 Property, Plant and Equipment, Net	Sep. 30, 2014 Goodwill	Dec. 31, 2013 Goodwill	Sep. 30, 2014 Intangible Assets - Net	Dec. 31, 2013 Intangible Assets - Net	Sep. 30, 2014 Other	Dec. 31, 2013 Other	Mar. 31, 2013 Other NBCU LLC	Mar. 19, 2013 Other NBCU LLC	Mar. 31, 2013 Other NBCU LLC Real Estate	Sep. 30, 2014 Accounts Payable	Dec. 31, 2013 Accounts Payable	Sep. 30, 2014 Other Current Liabilities	Dec. 31, 2013 Other Current Liabilities	Sep. 30, 2014 Bank Deposits	Dec. 31, 2013 Bank Deposits	Sep. 30, 2014 Liabilities Other	Dec. 31, 2013 Liabilities Other
Financial Information For Businesses Held For Sale
Proceeds from Sale of Real Estate Held-for-investment																									$ 1,430
Summarized financial information for business held for sale
Assets Held-for-sale, at Carrying Value	5,777		50	3,158						2,619	105	5	696	0	2,684	0	915	0	590	24	120	2	667	19
Liabilities of Assets Held-for-sale	1,721		6	914						807																		480	1	300	0	757	0	184	5
Ownership Percentage In Newly Formed Entity																										49.00%
Proceeds from Divestiture of Businesses, Net of Cash Divested	232	0		1,000	11,997	83	108	528	232	3,300
Guaranteed Debt Included In Sale Of Asset																										4,000
Preferred Stock, Value, Issued	0		0																							725
Consideration Received For Sale Of Business					16,722
Pre Tax Gain On Sale Of Business																									1,096		921
Gain On Sale Of Business Net Of Tax																									$ 825		$ 564