Stock-Based Compensation (Schedule Of Stock Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Millions	9 Months Ended
	Dec. 31, 2022 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Options, Outstanding, Beginning Balance | shares	286
Options, Granted | shares	2
Options, Exercised | shares	(164)
Options, Forfeited, cancelled or expired | shares	(1)
Options, Outstanding, Ending Balance | shares	123
Options, Vested and expected to vest | shares	123
Options, Exercisable | shares	122
Weighted-average exercise price of options outstanding, beginning balance | $ / shares	$ 39.28
Weighted-average exercise price of options granted during period | $ / shares	125.55
Weighted-average exercise price of options exercised during the period | $ / shares	39.47
Weighted-average exercise price of options forfeited, cancelled or expired during the period | $ / shares	64.95
Weighted-average exercise price of options outstanding, ending balance | $ / shares	40.69
Weighted-average exercise price of options vested and expected to vest | $ / shares	40.69
Weighted-average exercise price of options exercisable | $ / shares	$ 40.04
Weighted-average remaining contractual term of options outstanding	2 years 2 months 15 days
Weighted-average remaining contractual term of options vested and expected to vest	2 years 2 months 15 days
Weighted-average remaining contractual term of options exercisable	2 years 1 month 28 days
Aggregate intrinsic value of options outstanding | $	$ 10
Aggregate intrinsic value of options vested and expected to vest | $	10
Aggregate intrinsic value of options exercisable | $	$ 10