Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Income Statement [Abstract]
Net sales	$ 1,170.3	$ 994.6	$ 2,658.3	$ 2,229.5
Cost of sales	747.0	635.9	1,724.8	1,427.5
Cost of sales—impairment, restructuring and other	(0.1)	11.1	3.4	11.1
Gross profit	423.4	347.6	930.1	790.9
Operating expenses:
Selling, general and administrative	166.4	144.5	462.4	418.7
Impairment, restructuring and other	0.6	19.3	4.3	29.4
Other income, net	(1.8)	(1.9)	(0.1)	(3.3)
Income (loss) from operations	258.2	185.7	463.5	346.1
Equity in income of unconsolidated affiliates	0.0	(1.1)	(3.3)	(3.3)
Interest expense	25.9	23.2	80.0	63.6
Other non-operating (income) expense, net	(5.1)	(2.6)	(268.2)	4.2
Income (loss) from continuing operations before income taxes	237.4	166.2	655.0	281.6
Income tax expense from continuing operations	59.4	40.7	162.7	23.4
Income (loss) from continuing operations	178.0	125.5	492.3	258.2
Income (loss) from discontinued operations, net of tax	23.6	(42.7)	26.1	(47.6)
Net income (loss)	201.6	82.8	518.4	210.6
Net loss attributable to noncontrolling interest	0.1	0.1	0.2	0.1
Net income (loss) attributable to controlling interest	$ 201.7	$ 82.9	$ 518.6	$ 210.7
Basic income (loss) per common share:
Income from continuing operations (USD per share)	$ 3.21	$ 2.27	$ 8.89	$ 4.57
Income (loss) from discontinued operations (USD per share)	0.42	(0.77)	0.47	(0.84)
Basic income per common share (USD per share)	$ 3.63	$ 1.50	$ 9.36	$ 3.73
Weighted-average common shares outstanding during the period (shares)	55.5	55.4	55.4	56.5
Diluted income (loss) per common share:
Income from continuing operations (USD per share)	$ 3.15	$ 2.23	$ 8.78	$ 4.50
Income (loss) from discontinued operations (USD per share)	0.41	(0.76)	0.46	(0.83)
Diluted income per common share (USD per share)	$ 3.56	$ 1.47	$ 9.24	$ 3.67
Weighted-average common shares outstanding during the period plus dilutive potential common shares (shares)	56.6	56.3	56.1	57.4