Income Taxes - Items Accounting for Differences Between Income Taxes Computed at Federal Statutory Rate and Provision Recorded for Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income taxes computed at the federal statutory rate	$ 8,012,000,000	$ 5,078,000,000	$ 2,935,000,000
Effect of:
Tax impact of foreign earnings and losses	(1,349,000,000)	(538,000,000)	453,000,000
State taxes, net of federal benefits	465,000,000	343,000,000	221,000,000
Tax credits	(1,136,000,000)	(639,000,000)	(466,000,000)
Stock-based compensation	(1,094,000,000)	(1,107,000,000)	(850,000,000)
Foreign income deduction (2)	(301,000,000)	(372,000,000)	(72,000,000)
Other, net	194,000,000	98,000,000	153,000,000
Provision for income taxes, net	4,791,000,000	2,863,000,000	2,374,000,000
Excess tax benefits from stock-based compensation	$ 1,900,000,000	$ 1,800,000,000	$ 1,400,000,000