Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 149.0	$ 165.2	$ 127.8	$ 100.3
Other comprehensive income (loss):
Net foreign currency translation adjustment	15.8	1.8	15.7	(2.2)
Net unrealized gain (loss) on derivative instruments, net of tax of $0.8, $0.0, $1.1 and $1.9, respectively	2.0	0.0	2.8	3.0
Reclassification of net unrealized (gain) loss on derivatives to net income, net of tax of $(0.4), $0.7, $(0.5) and $0.9, respectively	(1.1)	1.1	(1.2)	1.5
Reclassification of net pension and other post-retirement benefits loss to net income, net of tax of $0.1, $0.3, $0.2 and $0.6, respectively	0.3	0.5	0.6	0.9
Total other comprehensive income (loss)	17.0	3.4	17.9	3.2
Comprehensive income (loss)	$ 166.0	$ 168.6	$ 145.7	$ 103.5