Income Taxes - Narrative (Details) € in Millions, shares in Millions, $ in Millions, kr in Billions	1 Months Ended	3 Months Ended			6 Months Ended	12 Months Ended				24 Months Ended
	Oct. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2013 USD ($) shares	Dec. 31, 2018 USD ($)	Dec. 31, 2018 SEK (kr)	Dec. 31, 2017 EUR (€)	Dec. 31, 2015 USD ($)
Income Tax [Line Items]
Reduction in unrecognized tax benefits resulting from Closing Agreement			$ 437			$ 312	$ 1	$ 18
Additional federal and state cash payments related to Closing Agreement					$ 345
Provisional amount recorded for effects of TCJA				$ 636
Additional tax expense (benefit) for effects of U.S. Tax Reform Act		$ (285)
Aggregate U.S. Tax Reform Act tax expense, net										$ 351
Tax expense related to adjustment to the transition tax										570
Tax benfefit related to remeasurement of deferred taxes related to GILTI										219
Repurchase of shares of common stock (in shares) | shares									429
Potential tax benefit						(64)	(878)	(140)
NOL carryforwards, foreign		22			22	22				22
Valuation allowance		61		0	61	61	0			61
Deferred tax liability related to undistributed foreign earnings		16			16	16				16
Deferred tax asset related to GILTI		263			263	263				263
Unrecognized tax benefits		917		1,138	917	917	1,138	846		917			$ 552
Unrecognized tax benefits that would affect effective tax rate		812			812	812				812
Accrued interest and penalties related to uncertain tax positions		87		121	87	87	121	71		87
Interest expense related to uncertain tax positions						11	28	17
King Acquisition
Income Tax [Line Items]
Uncertain tax position assumed								$ 74
State
Income Tax [Line Items]
Tax credit carryforward		172			172	172				172
New VH
Income Tax [Line Items]
NOL carryforward									$ 760
NOL carryforward indemnification amount									200
Cumulative operating loss utilized - New VH NOL				760			760
Indemnification asset recorded in other assets				200			200
Indemnification asset recorded in treasury stock				200			200
New VH | Expected
Income Tax [Line Items]
Potential tax benefit									$ 266
Domestic Tax Authority
Income Tax [Line Items]
Additional federal and state cash payments related to Closing Agreement	$ 334
Swedish Tax Agency
Income Tax [Line Items]
Total assessment, including penalties and interest, not recorded		$ 400			$ 400	$ 400				$ 400	kr 3.5
French Tax Authority
Income Tax [Line Items]
Total assessment, including penalties and interest, not recorded				$ 652			$ 652					€ 571
Settlement From Closing Agreement
Income Tax [Line Items]
Tax expense (benefit) related to tax settlement			70
Indirect Tax Benefits Due to Closing Agreement
Income Tax [Line Items]
Tax expense (benefit) related to tax settlement			$ (185)