Equity (Common Stock - Narrative) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Equity [Abstract]
Treasury Stock, Shares, Acquired					23,665,630	30,939,541
Treasury Stock, Value, Acquired, Cost Method, Net Of Excise Tax					$ 1,500
Treasury Stock, Value, Acquired, Cost Method	$ 678	$ 787	$ 1,116	$ 915		$ 2,000
Treasury Stock, Value, Acquired, Cost Method, Excise Tax	$ 6	$ 7			$ 13