Stockholders' Equity Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		$ (2,898)
Beginning Balance		25,623	$ 25,063
Amounts Reclassified from Accumulated Other Comprehensive Loss		(12)	(146)
Other comprehensive (loss) income		77	(477)
Ending Balance		25,936	24,778
Ending Balance		(2,821)	(3,367)
Pension Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(396)	(1,433)
Other Comprehensive (Loss) Income, before Reclassifications, Net of Tax		8	(4)
Amounts Reclassified from Accumulated Other Comprehensive Loss		0	12
Other comprehensive (loss) income		8	8
Ending Balance		(388)	(1,425)
Other Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(31)	590
Other Comprehensive (Loss) Income, before Reclassifications, Net of Tax		3	1
Amounts Reclassified from Accumulated Other Comprehensive Loss		0	(158)
Other comprehensive (loss) income		3	(157)
Ending Balance		(28)	433
Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(2,543)	(1,970)
Other Comprehensive (Loss) Income, before Reclassifications, Net of Tax	[1]	91	(403)
Amounts Reclassified from Accumulated Other Comprehensive Loss		0	0
Other comprehensive (loss) income		91	(403)
Ending Balance		(2,452)	(2,373)
Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		72	(67)
Other Comprehensive (Loss) Income, before Reclassifications, Net of Tax		(13)	71
Amounts Reclassified from Accumulated Other Comprehensive Loss		(12)	(6)
Other comprehensive (loss) income		(25)	65
Ending Balance		47	(2)
Unrealized Gain (loss) on Investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		0	(10)
Other Comprehensive (Loss) Income, before Reclassifications, Net of Tax		0	4
Amounts Reclassified from Accumulated Other Comprehensive Loss	[2]	0	6
Other comprehensive (loss) income		0	10
Ending Balance		0	0
Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(2,898)	(2,890)
Beginning Balance		(2,898)	(2,890)
Other Comprehensive (Loss) Income, before Reclassifications, Net of Tax		89	(331)
Amounts Reclassified from Accumulated Other Comprehensive Loss		(12)	(146)
Other comprehensive (loss) income		77	(477)
Ending Balance		(2,821)	(3,367)
Ending Balance		$ (2,821)	$ (3,367)

[1] The cumulative translation adjustment gain for the three months ended March 31, 2022 was primarily driven by weakening of the USD against the Brazilian Real ("BRL") partially offset by the strengthening of the USD against the European Euro ("EUR") and Swiss Franc ("CHF"). The cumulative translation adjustment loss for the three months ended March 31, 2021 was primarily driven by strengthening of the USD against the Swiss Franc ("CHF"), Brazilian Real ("BRL") and European Euro.

[2] Reflected in other income - net in the interim Consolidated Statements of Operations.