Equity (Common Stock Repurchase Authorization) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Aug. 04, 2021	Dec. 11, 2020
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount		$ 3,000	$ 3,000
August2021Authorization
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 592
December2020Authorization
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 0