Earnings Per Share - Narrative (Details) - USD ($)	1 Months Ended
	Feb. 29, 2020	Oct. 21, 2020	Sep. 30, 2020	Jan. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Increase in quarterly dividend percentage	8.00%
Common stock dividends, per share (in dollars per share)	$ 0.26
Share Repurchase Program January 2019
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			$ 1,100,000,000
Share Repurchase Program October 2020 | Subsequent Event
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		$ 6,100,000,000