Consolidated Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 119	$ 115	$ 241	$ 232
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(17)	(42)	(72)	(22)
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax	0	2	2	3
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Reclassification Adjustments, Net of Tax	(4)	1	(2)	3
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent	(1)	0	10	0
Other comprehensive income, net of tax	(22)	(39)	(62)	(16)
Comprehensive income	$ 97	$ 76	$ 179	$ 216