Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Revenues:
Product	$ 701.6	$ 704.0	$ 2,024.5	$ 2,054.8
Service and other	121.3	148.4	405.0	446.6
Revenues	822.9	852.4	2,429.5	2,501.4
Costs of revenues:
Product	225.1	235.8	685.9	700.8
Amortization, Cost of Goods Sold	62.9	78.6	189.4	239.9
Impairment of intangible assets and equipment	0.0	0.0	25.8	374.6
Service and other	68.8	93.2	232.7	264.7
Gross profit	466.1	444.8	1,295.7	921.4
Operating expenses:
Research and development	55.1	61.4	165.5	171.8
Selling and marketing	103.5	143.6	359.0	423.1
General and administrative	105.3	79.9	260.3	248.5
Amortization of acquired intangible assets	10.2	11.9	29.5	40.1
Impairment of intangible assets and equipment	0.0	0.0	4.4	69.2
Restructuring and divestiture charges	1.0	2.7	4.8	6.0
Operating expenses	275.1	299.5	823.5	958.7
Income (loss) from operations	191.0	145.3	472.2	(37.3)
Interest income	0.5	1.2	4.0	3.3
Interest expense	(27.4)	(35.1)	(91.5)	(106.0)
Debt extinguishment loss	0.0	0.0	0.0	(0.8)
Other income, net	4.3	2.9	0.1	5.8
Income (loss) before income taxes	168.4	114.3	384.8	(135.0)
Provision (benefit) for income taxes	32.0	20.4	(232.1)	(54.9)
Net income (loss)	136.4	93.9	616.9	(80.1)
Noncontrolling Interest in Net Income (Loss) Other Noncontrolling Interests, Redeemable	(1.5)		(3.4)	0.0
Net income	$ 137.9	$ 93.9	$ 620.3	$ (80.1)
Net income (loss) per common share attributable to Hologic:
Basic (in usd per share)	$ 0.53	$ 0.35	$ 2.35	$ (0.30)
Diluted (in usd per share)	$ 0.53	$ 0.35	$ 2.34	$ (0.30)
Weighted average number of shares outstanding:
Basic (in shares)	259,870	268,932	263,667	269,586
Diluted (in shares)	261,047	270,789	265,092	269,586