Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Revenues:
Product	$ 699.3	$ 683.1
Service and other	151.2	147.6
Revenues	850.5	830.7
Costs of revenues:
Product	237.5	232.1
Amortization of acquired intangible assets	63.6	81.0
Impairment of intangible assets	25.8	0.0
Service and other	89.8	83.5
Gross profit	433.8	434.1
Operating expenses:
Research and development	61.2	53.2
Selling and marketing	144.9	146.0
General and administrative	88.5	78.6
Amortization of acquired intangible assets	9.1	14.1
Impairment of intangible assets	4.4	0.0
Restructuring charges	0.9	1.7
Operating expenses	309.0	293.6
Income from operations	124.8	140.5
Interest income	2.1	1.3
Interest expense	(32.8)	(36.1)
Debt extinguishment loss	0.0	(0.8)
Other income (expense), net	3.3	(0.6)
Income before income taxes	97.4	104.3
(Benefit) provision for income taxes	(288.4)	5.7
Net income	386.1	98.6
Noncontrolling Interest in Net Income (Loss) Other Noncontrolling Interests, Redeemable	(0.3)	0.0
Net income	$ 385.8	$ 98.6
Net income per common share attributable to Hologic:
Basic (in usd per share)	$ 1.44	$ 0.36
Diluted (in usd per share)	$ 1.43	$ 0.36
Weighted average number of shares outstanding:
Basic (in shares)	267,893	270,590
Diluted (in shares)	269,721	272,372