Stock-Based Compensation (Schedule Of Stock Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
Jun. 30, 2023 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	121
Options, Granted \| shares	1
Options, Exercised \| shares	(2)
Options, Outstanding, Ending Balance \| shares	120
Options, Vested and expected to vest \| shares	120
Options, Exercisable \| shares	120
Weighted-average exercise price of options outstanding, beginning balance \| $ / shares	$ 40.43
Weighted-average exercise price of options granted during period \| $ / shares	127.42
Weighted-average exercise price of options exercised during the period \| $ / shares	90.77
Weighted-average exercise price of options outstanding, ending balance \| $ / shares	40.21
Weighted-average exercise price of options vested and expected to vest \| $ / shares	40.21
Weighted-average exercise price of options exercisable \| $ / shares	$ 40.21
Weighted-average remaining contractual term of options outstanding	1 year 7 months 17 days
Weighted-average remaining contractual term of options vested and expected to vest	1 year 7 months 17 days
Weighted-average remaining contractual term of options exercisable	1 year 7 months 17 days
Aggregate intrinsic value of options outstanding \| $	$ 11
Aggregate intrinsic value of options vested and expected to vest \| $	11
Aggregate intrinsic value of options exercisable \| $	$ 11

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.