Stockholders' Equity Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		$ 24,079	$ 24,555	$ 75,074	$ 75,153	$ 24,555	$ 75,153
Amounts Reclassified from Accumulated Other Comprehensive Loss		22		6		29	12
Other comprehensive (loss) income		88	(663)	(155)	(74)	(575)	(229)
Ending Balance		24,801	24,079	26,067	75,074	24,801	26,067
Pension Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(1,247)		(620)	(1,247)	(620)
Other Comprehensive (Loss) Income, before Reclassifications, Net of Tax						(9)	6
Amounts Reclassified from Accumulated Other Comprehensive Loss						3	2
Other comprehensive (loss) income						(6)	8
Ending Balance		(1,253)		(511)		(1,253)	(511)
Other Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(81)		79	(81)	79
Other Comprehensive (Loss) Income, before Reclassifications, Net of Tax						2	(85)
Amounts Reclassified from Accumulated Other Comprehensive Loss						0	(1)
Other comprehensive (loss) income						2	(86)
Ending Balance		(79)		(7)		(79)	(7)
Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(1,944)		(2,793)	(1,944)	(2,793)
Other Comprehensive (Loss) Income, before Reclassifications, Net of Tax	[1]					(575)	(174)
Amounts Reclassified from Accumulated Other Comprehensive Loss						0	0
Other comprehensive (loss) income						(575)	(174)
Ending Balance		(2,519)		(1,854)		(2,519)	(1,854)
Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			2		(26)	2	(26)
Other Comprehensive (Loss) Income, before Reclassifications, Net of Tax						(22)	12
Amounts Reclassified from Accumulated Other Comprehensive Loss						26	11
Other comprehensive (loss) income						4	23
Ending Balance		6		(3)		6	(3)
Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(3,933)	(3,270)	(3,434)	(3,360)	(3,270)	(3,360)
Other Comprehensive (Loss) Income, before Reclassifications, Net of Tax						(604)	(241)
Amounts Reclassified from Accumulated Other Comprehensive Loss						29	12
Other comprehensive (loss) income		88	(663)	(155)	(74)	(575)	(229)
Ending Balance		$ (3,845)	$ (3,933)	$ (2,375)	$ (3,434)	$ (3,845)	(2,375)
Internal Reorganization [Member] | Pension Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive (loss) income							101
Internal Reorganization [Member] | Other Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive (loss) income							0
Internal Reorganization [Member] | Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive (loss) income							1,113
Internal Reorganization [Member] | Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive (loss) income							0
Internal Reorganization [Member] | Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive (loss) income							$ 1,214

[1] The cumulative translation adjustment loss for the six months ended June 30, 2019 was primarily driven by the weakening of the European Euro (“EUR”) against the USD. The cumulative translation adjustment loss for the six months ended June 30, 2020 was primarily driven by the weakening of the Brazilian Real (“BRL”) and the South African Rand (“ZAR”) against the USD