Accounts Receivable Sales Programs (Table 1) (Details) (Accounts Receivable Sales Programs [Member], USD $) In Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 31, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Accounts Receivable Sales Programs [Member]
Summary of the accounts receivable sales program
Accounts receivable sold to the third-party financial institution		$ 647	$ 599	$ 1,851	$ 1,805
Cash received for accounts receivable sold under the programs		356	338	1,051	1,124
Deferred purchase price related to accounts receivable sold		291	261	800	681
Cash received related to the deferred purchase price		295	266	793	746
Amount paid in conjunction with terminated programs	90				90
Accounts receivable sold and held by third-party financial institution		213		213		210
Uncollected deferred purchase price related to accounts receivable sold		$ 96		$ 96		$ 89