Earnings Per Share - Narrative (Details) - USD ($)	Feb. 10, 2021	Mar. 31, 2021	Oct. 21, 2020	Jan. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Remaining share repurchase authority amount		$ 5,300,000,000
Increase in quarterly dividend percentage	8.00%
Common stock dividends, per share (in dollars per share)	$ 0.28
January 2019 program
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Authorized share repurchase program amount				$ 5,000,000,000
Remaining share repurchase authority amount		$ 339,000,000
October 2020 program
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Authorized share repurchase program amount			$ 5,000,000,000