Financing Arrangement (Tables)

6 Months Ended

Sep. 30, 2023

Debt Instruments [Abstract]

Schedule of Carrying Values Of Liability and Equity Components of Senior Notes [Table Text Block]

The carrying and fair values of the Senior Notes are as follows (in millions):

	As of September 30, 2023		As of March 31, 2023
Senior Notes:
4.80% Senior Notes due 2026	$	400	$	400
1.85% Senior Notes due 2031	750		750
2.95% Senior Notes due 2051	750		750
Total principal amount	$	1,900	$	1,900
Unaccreted discount	(5)		(6)
Unamortized debt issuance costs	(14)		(14)
Net carrying value of Senior Notes	$	1,881	$	1,880
Fair value of Senior Notes (Level 2)	$	1,429	$	1,540

Interest and Other Income

The following table summarizes our interest expense recognized for the three and six months ended September 30, 2023 and 2022 that is included in interest and other income (expense), net on our Condensed Consolidated Statements of Operations (in millions):

	Three Months Ended September 30,				Six Months Ended September 30,
	2023		2022		2023		2022
Amortization of debt issuance costs	$	—	$	(1)	$	(1)	$	(1)
Coupon interest expense	(14)		(14)		(28)		(28)
Total interest expense	$	(14)	$	(15)	$	(29)	$	(29)