Equity (Common Stock - Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Cost of shares issued	$ 193	$ 160	$ 206
Repurchase Shares	72,296,518	26,361,487	49,131,501
Treasury Stock, Value, Acquired, Cost Method	$ 4,328	$ 1,151	$ 2,285
Stock Repurchase Program, Remaining Authorized Repurchase Amount	1,500
August2021Authorization
Class of Stock [Line Items]
Treasury Stock, Value, Acquired, Cost Method	25
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 1,506
Common Shares Issued For Stock Options [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues	4,926,185	3,933,989	5,856,057
Cost of shares issued	$ 195	$ 153	$ 199
Treasury Shares Issued For Stock Options [Member]
Class of Stock [Line Items]
Issued Treasury Stock	0	0	0