Stockholders' Equity Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended						9 Months Ended
		Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		$ 26,067	$ 75,074	$ 75,153	$ 77,703	$ 80,226	$ 79,593	$ 75,153	$ 79,593
Amounts Reclassified from Accumulated Other Comprehensive Income (loss)		3			0			15	(7)
Other comprehensive (loss) income		(292)	(155)	(74)	(86)	(2,015)	1,007	(521)	(1,094)
Ending Balance		25,261	26,067	75,074	71,999	77,703	80,226	25,261	71,999
Pension Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance				(620)			95	(620)	95
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax								9	15
Amounts Reclassified from Accumulated Other Comprehensive Income (loss)								4	(2)
Other comprehensive (loss) income								13	13
Ending Balance		(516)			108			(516)	108
Other Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance				79			(53)	79	(53)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax								(85)	0
Amounts Reclassified from Accumulated Other Comprehensive Income (loss)								(1)	0
Other comprehensive (loss) income								(86)	0
Ending Balance		(7)			(53)			(7)	(53)
Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance				(2,793)			(1,217)	(2,793)	(1,217)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	[1]							(471)	(1,099)
Amounts Reclassified from Accumulated Other Comprehensive Income (loss)								0	0
Other comprehensive (loss) income								(471)	(1,099)
Ending Balance		(2,141)			(2,316)			(2,141)	(2,316)
Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance				(26)			(2)	(26)	(2)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax								11	(3)
Amounts Reclassified from Accumulated Other Comprehensive Income (loss)								12	(5)
Other comprehensive (loss) income								23	(8)
Ending Balance		(3)			(10)			(3)	(10)
Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(2,375)	(3,434)	(3,360)	(2,185)	(170)	(1,177)	(3,360)	(1,177)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax								(536)	(1,087)
Amounts Reclassified from Accumulated Other Comprehensive Income (loss)								15	(7)
Other comprehensive (loss) income		(292)	(155)	(74)	(86)	(2,015)	1,007	(521)	(1,094)
Ending Balance		$ (2,667)	$ (2,375)	$ (3,434)	$ (2,271)	$ (2,185)	$ (170)	(2,667)	$ (2,271)
Internal Reorganization [Member] | Other Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income, Other, Net of Tax								0
Internal Reorganization [Member] | Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income, Other, Net of Tax								1,123
Internal Reorganization [Member] | Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income, Other, Net of Tax								1,214
Internal Reorganization [Member] | Derivative [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income, Other, Net of Tax								0
Internal Reorganization [Member] | Pension Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income, Other, Net of Tax								$ 91

[1] The cumulative translation adjustment loss for the nine months ended September 30, 2018 was primarily driven by the strengthening of the U.S. Dollar ("USD") against the Euro ("EUR") and the Brazilian real ("BRL"). The cumulative translation adjustment loss for the nine months ended September 30, 2019 was primarily driven by strengthening of the USD against the BRL, EUR, and the South African Rand (“ZAR”).