Income Taxes Income Taxes (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Deferred Tax Liabilities, Net	$ (241)			$ (241)	$ (103)
One-time transaction tax post-1986 E&P				1,044
Deferred tax assets, net of valuation allowance	249			249	154
Incremental tax liability asserted by IRS	1,162			1,162
Income Tax Examination, Penalties and Interest Accrued	11			11	655
Unrecognized Tax Benefits	427			427	1,238	$ 1,095	$ 1,056
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	332			332	1,150	1,006
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions				79	134	47
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions				4	16	14
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions				(433)	(3)	(17)
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	(90)	$ (303)		(459)	(2)	(3)
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations				(3)	(2)	(2)
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	416			416	338
Deferred Tax Assets, Net, Current	161			161	66
Deferred Tax Assets, Net, Noncurrent	87			87	88
Deferred Tax Assets, Inventory	18			18	29
Deferred Tax Assets, Operating Loss Carryforwards	450			450	478
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals	258			258	179
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Restructuring Charges	12			12	12
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	221			221	383
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Impairment Losses	28			28	32
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	106			106	104
Federal benefit of uncertain tax positions	10			10	163
Deferred Tax Assets, Other	37			37	48
Deferred Tax Assets, Gross	1,140			1,140	1,428
Deferred Tax Assets, Valuation Allowance	(344)			(344)	(465)
Change in Deferred Tax Assets, Valuation Allowance	(121)			(121)
Deferred Tax Liabilities, Noncurrent	(328)			(328)	(191)
Deferred Tax Liabilities, Property, Plant and Equipment	25			25	33
Deferred Tax Liabilities, Derivatives	44			44	5
Deferred Tax Liabilities, Goodwill and Intangible Assets, Intangible Assets	968			968	1,028
Deferred Tax Liabilities, Gross	1,037			1,037	1,066
Deferred Tax Liabilities	328			328	191
Current Federal Tax Expense (Benefit)				(221)	320	31
Income (Loss) from Continuing Operations before Income Taxes, Domestic				35	(408)	(1,019)
Income (Loss) from Continuing Operations before Income Taxes, Foreign				1,387	1,341	1,196
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest				1,422	933	177
Current State and Local Tax Expense (Benefit)				(27)	9	6
Current Foreign Tax Expense (Benefit)				160	255	136
Current Income Tax Expense (Benefit)				(87)	584	173
Deferred Federal Income Tax Expense (Benefit)				(124)	272	(337)
Deferred State and Local Income Tax Expense (Benefit)				4	1	(14)
Deferred Foreign Income Tax Expense (Benefit)				(42)	(28)	8
Deferred Income Tax Expense (Benefit)				(162)	244	(343)
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	$ 42			42	149
Other Comprehensive Income (Loss), Tax				37	63	9
Free Trade Zone Regime Tax Incentive				$ 146	$ 127	$ 123
Free Trade Zone Regime Tax Incentive Per Share	$ 0.10			$ 0.10	$ 0.09	$ 0.09
Gross interest and penalties recognized in period	$ (643)			$ (643)
Income Tax Examination, Penalties and Interest Expense				(498)	$ (154)	$ (46)
Deferred Tax Assets, Prepaid on Intercompany Profit	161			161	66
Net Deferred Tax Liabilities and Prepaid on Intercompany Profit	(80)			(80)	(37)
Deferred Tax Assets, Net of Valuation Allowance	796			$ 796	$ 963
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%	35.00%	35.00%
TCJA benefit recognized				$ 67
TCJA Tax Expense				793
Tax Cuts and Jobs Act, Incomplete Accounting, Provisional Income Tax Expense (Benefit)				861
Deferred tax asset TCJA remeasurement benefit				99
Tax Cuts and Jobs Act, Incomplete Accounting, Transition Tax for Accumulated Foreign Earnings, Provisional Liability				856
One-time transaction tax post-1986 E&P - net payment				499
Unrecognized Tax Benefits, Interest on Income Taxes Accrued		$ 307
Tax Adjustments, Settlements, and Unusual Provisions				250
Net Settlement Payment to IRS	$ 93			93
transition tax payment remaining				$ 429
tax expense on state income taxes, USD E&P accumulated					$ 18
Subsequent Event [Member]
Operating Loss Carryforwards [Line Items]
Potential Reduction In Unrecognized Tax Benefits Over Next Twelve Months As Result Of Concluding Certain Matters			$ 11