Stock-Based Awards and Other Equity Instruments - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for new stock-based awards, shares	9,000
Market value of shares vested in period	$ 503	$ 172	$ 117
Stock-based compensation	418	205	241
Stock-based compensation tax benefit	157	44	55
Capitalized stock-based compensation expense	68	36	30
Cash received from stock-based award exercises	476	301
Income tax benefit associated with employees exercise of stock-based awards	28	$ 1	$ 60
Unrecognized stock-based compensation expense	$ 881
Unrecognized stock-based compensation expense expected recognition period	2 years 11 months 1 day
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock purchase price as percentage of fair market value	85.00%
Eligible employees contribution of base compensation	15.00%
Employee stock purchase plan, shares purchased	194	212	171
Employee stock ownership plan, average purchase price of shares purchased	$ 135.38	$ 84.89	$ 99.41
Increase in number of shares reserved for issuance (in shares)	1,000
Number of shares available for issuance (in shares)	1,200
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price, as of year end (in dollars per share)	$ 180.72
Total intrinsic value of stock options exercised, value	$ 302	$ 74	$ 145