Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (80.5)	$ (64.7)
Other comprehensive income (loss):
Net foreign currency translation adjustment	3.1	7.2
Net unrealized loss on derivative instruments, net of tax	(8.2)	(4.8)
Reclassification of net unrealized gains on derivative instruments to net loss, net of tax	(1.5)	(3.7)
Net unrealized loss on securities, net of tax	(0.9)	(20.4)
Pension and other post-retirement benefit adjustments, net of tax	(1.4)	(2.9)
Total other comprehensive loss	(8.9)	(24.6)
Comprehensive loss	$ (89.4)	$ (89.3)