Income Taxes (Details 4)-K - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reasonably possible change in unrecognized tax benefits
Unused foreign tax credits expiring in 2017 through 2025	$ 389	$ 376
Unused research tax credits expiring from 2019 to 2035	14
Alternative minimum tax credits	23
Operating and capital loss carryforwards with indefinite life	145
Operating and capital loss carryforwards expiring between 2016 and 2036	290
Valuation allowance	1,026	1,036
Equity in undistributed earnings of foreign subsidiaries	2,500
Reconciliation of the Company's total gross unrecognized tax benefits
Balance at beginning of the period	77	100	$ 97
Additions and reductions for tax positions of prior years	1	(13)	(3)
Additions based on tax positions related to the current year	10	10	9
Reduction due to lapse of the applicable statute of limitations	(5)	(8)	(2)
Reductions due to settlements	(1)	(1)
Foreign currency translation	8	11	1
Balance at ending of the period	74	77	100
Unrecognized tax benefits, which if recognized, would impact the Company's effective income tax rate	67	70	92
Accrued interest and penalties	25	29	35
Interest and penalties included in tax expense	$ (1)	$ (2)	$ 1
Period during which unrecognized tax benefits are reasonably possible of being settled as a result of audit settlements or statute expirations	12 months
Maximum
Reconciliation of the Company's total gross unrecognized tax benefits
Reasonably possible decrease in unrecognized tax benefits related to audit settlements or statute expirations	$ 47