Equity - Dividends and Stock Repurchases (Details) $ / shares in Units, $ in Millions			3 Months Ended		9 Months Ended
	Feb. 28, 2022 $ / shares	Jan. 26, 2022 $ / shares	Jun. 30, 2022 $ / shares	Mar. 31, 2022 $ / shares	Sep. 30, 2022 USD ($) transaction shares	Sep. 30, 2021 USD ($)	Jun. 22, 2022 shares	Jan. 29, 2020 shares	Dec. 04, 2013 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Quarterly dividend rate (USD per share) | $ / shares	$ 0.85	$ 0.77	$ 0.85	$ 0.77
Total Cash Utilized | $					$ 11,003	$ 0
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%
Remaining shares available under repurchase program (shares)					30,000,000
2020 and 2013 Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining shares available under repurchase program (shares)					1,300,000
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%
ARS agreement transactions | transaction					2
Total Cash Utilized | $					$ 11,000
Stock repurchased during period (shares)					29,500,000
2020 Repurchase Program | Uncapped ASR, March 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Cash Utilized | $					$ 7,000
2013 Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized for repurchase (shares)									50,000,000
Shares authorized for repurchase, compared to total common stock outstanding (as a percent)									18.00%