Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax [Line Items]
Income tax expense	$ 140	$ 229	$ 146
Reserve established for NOL tax attribute received from Purchase Transaction	114	63
NOL carryforwards, state	9
NOL carryforwards, foreign	6
Undistributed earnings of foreign subsidiaries	5,127
Unrecognized tax benefits	846	552	419	$ 294
Unrecognized tax benefits that would affect effective tax rate	812
Accrued interest and penalties related to uncertain tax positions	71	41
Interest expense related to uncertain tax positions	17	10	$ 5
King Acquisition
Income Tax [Line Items]
Uncertain tax position assumed	74
Federal
Income Tax [Line Items]
Tax credit carryforward	240
State
Income Tax [Line Items]
Tax credit carryforward	137
New VH
Income Tax [Line Items]
NOL carryforward				760
NOL carryforward indemnification amount				200
Cumulative operating loss utilized - New VH NOL	657
Indemnification asset recorded in other assets	200
Indemnification asset recorded in treasury stock	200
Net operating loss utilized - New VH NOL	$ 326	$ 180
New VH | Expected
Income Tax [Line Items]
Income tax expense				$ 266