Income Taxes (Narrative) (Details) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2015 USD ($) assessment $ / shares	Dec. 31, 2013 USD ($) $ / shares	Dec. 31, 2015 USD ($) assessment	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Income Taxes [Line Items]
Foreign earnings, as a percentage to total foreign earnings			51.00%	47.00%	65.00%
Tax assets related to net operating loss carry-forwards related to certain international subsidiaries	$ 301		$ 301	$ 305
Deferred Tax Assets, Valuation Allowance	302		302	347
Deferred Tax Assets, Tax Credit Carryforwards					$ 107
Prior Period Income Tax Benefit Recognized in the Current Period					55
Tax assets related to net operating loss carry-forwards related to capital losses	22		22	21
Tax assets related to excess foreign tax credits	90		90	76
State tax attributes	62		62	70
Approximate undistributed earnings of foreign subsidiaries and affiliated corporate joint venture companies accounted for on the equity method	9,600		9,600
Accrued interest and penalties on unrecognized tax benefits	20		20	21
Positive impact on the tax expense if the total amount of unrecognized tax benefits were recognized by the Company at one time	36		36
Valuation Allowance on Deferred Tax Assets, Recognized in Earnings	$ 66
Valuation Allowance on Deferred Tax Assets, Recognized in Earnings, Per Share | $ / shares	$ 0.11
Domestic Tax Authority [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance		$ 41			41
Secretariat of the Federal Revenue Bureau of Brazil [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 58	17	58		17
Argentine Tax Authority [Member]
Income Taxes [Line Items]
Estimated additional tax assessment	165		165
Foreign [Member]
Income Taxes [Line Items]
Tax assets related to net operating loss carry-forwards related to certain international subsidiaries with no expiration date	222		222
Tax assets related to net operating loss carry-forwards related to certain international subsidiaries with expiration date	79		79
Valuation allowance recorded against tax assets related to net operating loss carry-forwards related to certain international subsidiaries	$ 127		127	218
German Tax Authority [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance		103			$ 103
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount			$ 85
Valuation Allowance on Deferred Tax Assets, Recognized in Earnings		$ 82
Valuation Allowance on Deferred Tax Assets, Recognized in Earnings, Per Share | $ / shares		$ 0.12
Tax years 2004, 2006. and 2007 [Member] | Secretariat of the Federal Revenue Bureau of Brazil [Member]
Income Taxes [Line Items]
Number of separate tax assessments | assessment	3		3
Income Tax Examination, Estimate of Possible Loss			$ 361
Tax years 2004 to 2008 [Member] | Argentine Tax Authority [Member]
Income Taxes [Line Items]
Income Tax Examination, Estimate of Possible Loss			123
Valuation Allowance, Other Tax Carryforward [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 22		22	21
Valuation Allowance, Tax Credit Carryforward [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	8		8
Valuation Allowance, Operating Loss Carryforwards [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 47		$ 47	$ 51