Fair Value of Assets and Liabilities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2012 Fair Value, Measurements, Recurring [Member] Estimate of Fair Value, Fair Value Disclosure [Member]		Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Estimate of Fair Value, Fair Value Disclosure [Member]		Mar. 31, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1 [Member]		Mar. 31, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]		Mar. 31, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits held in money market funds		$ 89	[1]	$ 33	[1]	$ 89	[1]	$ 33	[1]	$ 0	[1]	$ 0	[1]	$ 0	[1]	$ 0	[1]
Available for sale securities		11	[2]	10	[2]	11	[2]	10	[2]	0	[2]	0	[2]	0	[2]	0	[2]
Foreign exchange forward and option contracts		2	[3]	6	[3]	0	[3]	0	[3]	2	[3]	6	[3]	0	[3]	0	[3]
Total assets		102		49		100		43		2		6		0		0
Interest rate swap		8		9		0		0		8		9		0		0
Foreign exchange forward contracts		5	[4]	3	[4]	0	[4]	0	[4]	5	[4]	3	[4]	0	[4]	0	[4]
Total liabilities		13		12		0		0		13		12		0		0
Equity method investment, other than temporary impairment	3
Equity method investments	$ 4

[1] Included in Cash and cash equivalents in the Condensed Consolidated Balance Sheet.

[2] Included in Other assets in the Condensed Consolidated Balance Sheet.

[3] Included in Other current assets in the Condensed Consolidated Balance Sheet.

[4] Included in Other current liabilities in the Condensed Consolidated Balance Sheet.