Income Taxes - Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Line Items]
Effective tax rate	29.80%	28.60%	29.40%
Undistributed earnings of the Company's international subsidiaries	$ 1,165
Operating loss carryforward, subject to expiration	13
Operating loss carryforwards, valuation allowance	2
Net unrecognized tax benefits that if recognized would affect the annual effective tax rate	20	21	17
Decrease due to audit activity and statute of limitation expirations	2
Unrecognized tax benefits and expense	1	2	1
Interest, net of tax and penalties accrued	$ 3	$ 2
Maximum
Income Taxes [Line Items]
Range of years, deferred tax expense	2032
Minimum
Income Taxes [Line Items]
Range of years, deferred tax expense	2013