Income Taxes (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes
Unused foreign tax credits expiring in 2017 through 2022	$ 354,000,000	$ 338,000,000
Unused research tax credits expiring from 2013 to 2032	19,000,000
Alternative minimum tax credits	26,000,000
Operating and capital loss carryforwards with indefinite life	188,000,000
Operating and capital loss carryforwards expiring between 2013 and 2032	298,000,000
Equity in undistributed earnings of foreign subsidiaries	2,500,000,000
Reconciliation of the Company's total gross unrecognized tax benefits
Balance at beginning of the period	125,000,000	143,000,000	120,000,000
Additions and reductions for tax positions of prior years	8,000,000	(15,000,000)	26,000,000
Additions based on tax positions related to the current year	7,000,000	30,000,000	5,000,000
Additions for tax positions of prior years on acquisitions			12,000,000
Reduction due to lapse of the applicable statute of limitations	(21,000,000)	(8,000,000)	(1,000,000)
Reductions due to settlements	(26,000,000)	(18,000,000)	(13,000,000)
Foreign currency translation	4,000,000	(7,000,000)	(6,000,000)
Balance at ending of the period	97,000,000	125,000,000	143,000,000
Unrecognized tax benefits, which if recognized, would impact the Company's effective income tax rate	89,000,000	114,000,000	125,000,000
Accrued interest and penalties	33,000,000	49,000,000	36,000,000
Interest and penalties included in tax expense	$ (6,000,000)	$ 18,000,000	$ 4,000,000
Period during which unrecognized tax benefits are reasonably possible of being settled as a result of audit settlements or statute expirations (in months)	12 months