Equity - Dividends and Stock Repurchases (Details) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 25, 2023 $ / shares	Feb. 28, 2023 shares	Sep. 30, 2023 $ / shares shares	Sep. 30, 2022 $ / shares	Sep. 30, 2023 USD ($) transaction $ / shares shares	Sep. 30, 2022 USD ($) $ / shares shares	Jun. 22, 2022 shares	Jan. 29, 2020 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends declared per common share (USD per share) | $ / shares	$ 0.90		$ 0.90	$ 0.85	$ 2.70	$ 2.47
Remaining shares available under repurchase program (shares)			21,500,000		21,500,000
ARS agreement transactions | transaction					2
Shares delivered and purchased (shares)					5,800,000
Payments for repurchase of stock | $					$ 2,001	$ 11,003
Stock repurchased during period (shares)					5,400,000
Uncapped ASR, December 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares delivered and purchased (shares)		400,000
Uncapped ASR, March 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payments for repurchase of stock | $						7,000
2022 Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized for repurchase (shares)							30,000,000
Shares authorized for repurchase, compared to total common stock outstanding (as a percent)							9.00%
2020 Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized for repurchase (shares)								30,000,000
Shares authorized for repurchase, compared to total common stock outstanding (as a percent)								12.00%
Stock Repurchases | Uncapped ASR, March 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payments for repurchase of stock | $						$ 11,000
Stock repurchased during period (shares)						29,500,000