Fair Value of Assets and Liabilities (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Fair Value, Inputs, Level 1 [Member]
Assets: [Abstract]
Deposits held in money market funds	$ 85	[1]	$ 82	[1]
Foreign exchange contracts	0	[2]	0	[2]
Total assets	85		82
Liabilities: [Abstract]
Interest rate swap	0	[3]	0	[3]
Foreign exchange contracts	0	[3]	0	[3]
Total liabilities	0		0
Fair Value, Inputs, Level 2 [Member]
Assets: [Abstract]
Deposits held in money market funds	0	[1]	0	[1]
Foreign exchange contracts	9	[2]	1	[2]
Total assets	9		1
Liabilities: [Abstract]
Interest rate swap	6	[3]	6	[3]
Foreign exchange contracts	3	[3]	5	[3]
Total liabilities	9		11
Fair Value, Inputs, Level 3 [Member]
Assets: [Abstract]
Deposits held in money market funds	0	[1]	0	[1]
Foreign exchange contracts	0	[2]	0	[2]
Total assets	0		0
Liabilities: [Abstract]
Interest rate swap	0	[3]	0	[3]
Foreign exchange contracts	0	[3]	0	[3]
Total liabilities	0		0
Estimate of Fair Value, Fair Value Disclosure [Member]
Assets: [Abstract]
Deposits held in money market funds	85	[1]	82	[1]
Foreign exchange contracts	9	[2]	1	[2]
Total assets	94		83
Liabilities: [Abstract]
Interest rate swap	6	[3]	6	[3]
Foreign exchange contracts	3	[3]	5	[3]
Total liabilities	$ 9		$ 11

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

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

[3] (3) Included in Other current liabilities and Other liabilities in the Condensed Consolidated Balance Sheet.