Equity Equity (Share Repurchase Program) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Value, Acquired, Cost Method	$ 99	$ 163	$ 101
Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired	852,037	1,074,413
Treasury Stock, Value, Acquired, Cost Method	$ 96	$ 153
Treasury Stock Acquired, Average Cost Per Share	$ 112.64	$ 142.05