Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit)	$ 2,077	$ 1,580	$ (204)
Excess of tax basis over book basis of intangible assets	1,157	1,177
Valuation allowance	520	398	217
Unrecognized tax benefits	800	1,200
Income tax penalties and interest expense	41	(82)	105
Accrued interest and income tax penalties	218	177
Decrease in unrecognized tax benefits that is reasonably possible	100
Accrued repatriation of foreign earnings	4,000	$ 4,500
Accrued repatriation of foreign earnings, expected to be paid	473
Domestic tax authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	250
Tax credit carryforward	8
State and local jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	2,800
Tax credit carryforward	$ 768
Intangible Asset Transfer
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit)			(1,200)
Excess of tax basis over book basis of intangible assets			$ 1,200