Share-Based Compensation - Narrative (Details) $ / shares in Units, $ in Millions	6 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($) equityPlan $ / shares shares	Oct. 01, 2022 $ / shares	Mar. 29, 2008 stockOptionPlan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity plans | equityPlan	2
Estimated value of future forfeitures | $	$ 13
Service-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value of RSUs (in dollars per share) | $ / shares	$ 36.87	$ 49.80
Performance-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value of RSUs (in dollars per share) | $ / shares	$ 36.82	$ 47.41
2008 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity plans adopted | stockOptionPlan			1
Shares authorized for issuance (up to) (in shares)	23,980,823
Shares available for grant (in shares)	0
Option expiration period (years)	10 years
2012 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance (up to) (in shares)	22,471,000
Shares available for grant (in shares)	4,184,265
Option expiration period (years)	7 years