Share-Based Compensation Plans (Stock Option Activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options Outstanding, Beginning	1,961
Stock options, Granted	262
Stock options, Exercised	(371)
Stock options, Forfeited	(25)
Stock Options Outstanding, Ending	1,827	1,961
Options exercisable, Shares	1,173
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Outstanding, Beginning	$ 56.08
Weighted Average Exercise Price / Share, Granted	102.61
Weighted Average Exercise Price / Share, Exercised	50.12
Weighted Average Exercise Price / Share, Forfeited	84.72
Weighted Average Exercise Price, Outstanding, Ending	64.12	$ 56.08
Options exercisable, Weighted Average Exercise Price	$ 52.69
Weighted Average Remaining Contractual Term, Outstanding	6 years 1 month 6 days	6 years 3 months 18 days
Aggregate intrinsic value of outstanding stock options	$ 102
Weighed average remaining contractual term, Options exercisable	4 years 9 months 18 days
Aggregate intrinsic value of exercisable stock options	$ 79
Vested and non-vested expected to vest as of December 31, 2021	1,778
Vested and non-vested expected to vest as of December 31, 2021	$ 63.46
Vested and non-vested expected to vest as of December 31, 2021	6 years 1 month 6 days
Aggregate intrinsic value, vested and expected to vest	$ 100