Income Taxes Income Taxes (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Domestic					$ (660)	$ (1,145)	$ 35
Income (Loss) from Continuing Operations before Income Taxes, Foreign					581	1,832	1,387
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest					(79)	687	1,422
Current Federal Tax Expense (Benefit)					(29)	120	(221)
Current State and Local Tax Expense (Benefit)					(35)	54	(27)
Current Foreign Tax Expense (Benefit)					151	101	160
Current Income Tax Expense (Benefit)					87	275	(87)
Deferred Federal Income Tax Expense (Benefit)					(26)	(146)	(124)
Deferred State and Local Income Tax Expense (Benefit)					(6)	(18)	4
Deferred Foreign Income Tax Expense (Benefit)					(53)	(4,124)	(42)
Deferred Income Tax Expense (Benefit)					(85)	(4,288)	(162)
Income Tax Expense (Benefit)					2	(4,013)	(249)
Deferred Tax Assets, Inventory	$ 10				10	0
Deferred Tax Assets, Operating Loss Carryforwards	557				557	545
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals	308				308	258
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Restructuring Charges	23				23	20
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	82				82	168
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Impairment Losses	0				0	42
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	134				134	121
Federal benefit of uncertain tax positions	9				9	10
Deferred Tax Assets, Goodwill and Intangible Assets	3,551				3,551	3,447
Deferred Tax Assets, Other	(6)				(6)	0
Deferred Tax Assets, Tax Deferred Expense	4,668				4,668	4,611
Deferred Tax Assets, Valuation Allowance	(887)				(887)	(915)
Deferred Tax Assets, Net of Valuation Allowance	3,781				3,781	3,696
Deferred Tax Liabilities, Property, Plant and Equipment	1				1	16
Deferred Tax Liabilities, Derivatives	12				12	52
Deferred Tax Liabilities, Goodwill and Intangible Assets, Intangible Assets	34				34	0
Deferred Tax Liabilities, Inventory	0				0	2
Deferred Tax Liabilities, Other	0				0	25
Deferred Tax Liabilities, Gross	47				47	95
Deferred Tax Assets, Gross	3,734				3,734	3,601
Deferred Tax Assets, Prepaid on Intercompany Profit	194				194	195
Net Deferred Tax Liabilities and Prepaid on Intercompany Profit	3,928				3,928	3,796
Deferred Tax Assets	4,406				4,406	4,391
Deferred Tax Liabilities, Net	478				478	595
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	474				474	449
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	83				83	105
Deferred Tax Asset, Intra-entity Transfer, Asset Other than Inventory						4,102
Deferred Tax Asset, Valuation Allowance, Intra-entity						542
Change in Deferred Tax Assets, Valuation Allowance	$ (28)				(28)
Other Comprehensive Income (Loss), Tax					(78)	13	37
Free Trade Zone Regime Tax Incentive					$ 64	$ 173	$ 146
Free Trade Zone Regime Tax Incentive Per Share	$ 0.04		$ 0.10		$ 0.04	$ 0.12	$ 0.10
Tax Incentives in Puerto Rico					$ 30
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 183		$ 332		183	$ 355	$ 332
Unrecognized Tax Benefits	261		427		261	455	427	$ 1,238
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions					28	30	79
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions					6	45	4
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions					(186)	(34)	(433)
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities			(90)	$ (303)	(27)	(4)	(459)
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations					(15)	(9)	(3)
Unrecognized Tax Benefits, Interest on Income Taxes Accrued				$ 307
Tax Adjustments, Settlements, and Unusual Provisions	62	$ 91					250
Net Settlement Payment to IRS			93				93
Income Tax Examination, Penalties and Interest Accrued	41				41	19
Income Tax Examination, Penalties and Interest Expense					(7)	(1)	(498)
Decrease in Unrecognized Tax Benefits is Reasonably Possible	27				27
Tax Cuts and Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit)							67
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability	939		$ 856		939		$ 856
One-time transaction tax post-1986 E&P - net payment					597
transition tax payment remaining					477
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Income Tax Expense					20
The CARES Act	2,200,000				2,200,000
Prepaid Expenses and Other Current Assets [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets	194				194	195
Assets held for sale [Domain]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets	2				2	0
Deferred tax assets [Domain]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets	4,210				4,210	4,196
Deferred tax liabilities [Domain]
Operating Loss Carryforwards [Line Items]
Deferred Tax Liabilities, Net	330				330	595
Liabilities held for sale in Other current liabilities [Domain]
Operating Loss Carryforwards [Line Items]
Deferred Tax Liabilities, Net	$ 148				$ 148	$ 0