Stockholders' Equity - Additional Information (Details) - USD ($) shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jan. 29, 2020	Jan. 28, 2016
Class of Stock [Line Items]
Remaining authorized repurchase amount under stock repurchase programs	$ 6,800,000,000		$ 6,800,000,000
2016 Stock Repurchase Program
Class of Stock [Line Items]
Authorized amount under stock repurchase program						$ 12,000,000,000.0
Shares repurchased and retired (in shares)	3	3	22	25
Value of shares repurchased and retired	$ 201,000,000	$ 223,000,000	$ 1,600,000,000	$ 1,600,000,000
2020 Stock Repurchase Program
Class of Stock [Line Items]
Authorized amount under stock repurchase program					$ 5,000,000,000.0