Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Line Items]
Foreign earnings, as a percentage to total foreign earnings	59.00%	61.00%	56.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability	$ 164
Effective income tax rate reconciliation, GILTI, Amount	259	$ 105	$ 101
Effective income tax rate reconciliation, FDII, Amount	12	1	$ 101
Tax assets related to net operating loss carry-forwards related to certain international subsidiaries	470	411
Deferred Tax Assets, Valuation Allowance	339	325
Tax assets related to net operating loss carry-forwards related to capital losses	70	62
State tax attributes	79	74
Approximate undistributed earnings of foreign subsidiaries and affiliated corporate joint venture companies accounted for on the equity method	12,500
Deferred Tax Liabilities, Investment in Noncontrolled Affiliates	64	72
Accrued interest and penalties on unrecognized tax benefits	33	26
Positive impact on the tax expense if the total amount of unrecognized tax benefits were recognized by the Company at one time	151
Argentine Tax Authorities [Member]
Income Taxes [Line Items]
Income tax assessment - Tax	10
Income tax assessment - Interest and Penalties	42
Estimated additional tax assessment	31
Additional income tax assessment - Interest and Penalties	27
Foreign [Member]
Income Taxes [Line Items]
Tax assets related to net operating loss carry-forwards related to certain international subsidiaries with no expiration date	357
Tax assets related to net operating loss carry-forwards related to certain international subsidiaries with expiration date	113
Valuation allowance recorded against tax assets related to net operating loss carry-forwards related to certain international subsidiaries	197	193
Tax and Customs Administration, Netherlands [Member]
Income Taxes [Line Items]
Income tax assessment - Tax	99
Additional income tax assessment - Interest and Penalties	38
SEC Schedule, 12-09, Valuation Allowance, Other Tax Carryforward [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	70	62
SEC Schedule, 12-09, Valuation Allowance, Operating Loss Carryforward [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 72	$ 70