Equity (Summary of Activity Related to Stock Options) (Details) - Stock Options - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Shares Under Option
Shares Under Option Outstanding at January 1,	4,268,091
Granted Shares Under Option	402,976
Exercised Shares Under Option	(1,259,933)
Expired Shares Under Option	(6,424)
Forfeited Shares Under Option	(18,669)
Shares Under Option Outstanding at December 31,	3,386,041	4,268,091
Vested and expected to vest at December 31,	3,376,464
Shares Under Option Exercisable at December 31,	2,533,864
Weighted Average Exercise Price
Weighted Average Exercise Price Outstanding at January 1,	$ 44.02
Granted Weighted Average Exercise Price	68.96	$ 57.43	$ 47.58
Exercised Weighted Average Exercise Price	37.79
Expired Weighted Average Exercise Price	33.35
Forfeited Weighted Average Exercise Price	60.07
Weighted Average Exercise Price Outstanding at December 31,	49.24	$ 44.02
Weighted Average Exercise Price Aggregate number of stock options expected to vest at December 31,	49.20
Weighted Average Exercise Price Exercisable at December 31,	$ 45.25
Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term Outstanding at January 1,	5 years 6 months 29 days	5 years 10 days
Weighted Average Remaining Contractual Term Aggregate number of stock options expected to vest at December 31,	5 years 6 months 25 days
Weighted Average Remaining Contractual Term Exercisable at December 31,	4 years 7 months 9 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value Outstanding at January 1,	$ 79
Aggregate Intrinsic Value Outstanding at December 31,	78	$ 79
Aggregate Intrinsic Value Aggregate number of stock options expected to vest at December 31,	78
Aggregate Intrinsic Value Exercisable at December 31,	$ 69
Sale of Stock, Price Per Share	$ 72.37	$ 62.49