Royalties And Licenses (Schedule Of Royalty-Related Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Mar. 31, 2023
Royalty Related Liabilities
Royalty-related liabilities	$ 186	$ 208
Accrued royalties
Royalty Related Liabilities
Royalty-related liabilities	176	208
Other liabilities
Royalty Related Liabilities
Royalty-related liabilities	$ 10	$ 0

Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

Name:	us-gaap_AccruedRoyaltiesCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant