Income Taxes (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) assessment	Dec. 31, 2015 USD ($)	Dec. 31, 2014
Income Taxes [Line Items]
Foreign earnings, as a percentage to total foreign earnings	47.00%	51.00%	47.00%
Tax assets related to net operating loss carry-forwards related to certain international subsidiaries	$ 278	$ 301
Deferred Tax Assets, Valuation Allowance	216	302
Tax assets related to net operating loss carry-forwards related to capital losses	57	22
Tax assets related to excess foreign tax credits	95	90
State tax attributes	62	62
Approximate undistributed earnings of foreign subsidiaries and affiliated corporate joint venture companies accounted for on the equity method	9,300
Accrued interest and penalties on unrecognized tax benefits	26	20
Positive impact on the tax expense if the total amount of unrecognized tax benefits were recognized by the Company at one time	51
Argentine Tax Authority [Member]
Income Taxes [Line Items]
Estimated additional tax assessment	204
Foreign [Member]
Income Taxes [Line Items]
Tax assets related to net operating loss carry-forwards related to certain international subsidiaries with no expiration date	200
Tax assets related to net operating loss carry-forwards related to certain international subsidiaries with expiration date	78
Valuation allowance recorded against tax assets related to net operating loss carry-forwards related to certain international subsidiaries	$ 126	127
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
Income Tax Examination, Estimate of Possible Loss	$ 463
Tax years 2004 to 2010 [Member] | Argentine Tax Authority [Member]
Income Taxes [Line Items]
Income Tax Examination, Estimate of Possible Loss	126
Tax Year 2009 [Member] | Tax and Customs Administration, Netherlands [Member]
Income Taxes [Line Items]
Income Tax Examination, Estimate of Possible Loss	95
Valuation Allowance, Other Tax Carryforward [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	41	22
Valuation Allowance, Tax Credit Carryforward [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	0	8
Valuation Allowance, Operating Loss Carryforwards [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 49	$ 47