Consolidated Statements of Income - USD ($) shares in Thousands	3 Months Ended
	Dec. 26, 2020	Dec. 28, 2019
Revenues:
Product	$ 1,455,400,000	$ 699,300,000
Service and other	154,400,000	151,200,000
Revenues	1,609,800,000	850,500,000
Costs of revenues:
Product	284,500,000	237,500,000
Amortization, Cost of Goods Sold	61,600,000	63,600,000
Impairment of intangible assets and equipment	0	25,800,000
Service and other	83,300,000	89,800,000
Gross profit	1,180,400,000	433,800,000
Operating expenses:
Research and development	59,300,000	61,200,000
Selling and marketing	128,000,000.0	144,900,000
General and administrative	91,500,000	87,600,000
Amortization of acquired intangible assets	10,100,000	9,100,000
Impairment of intangible assets and equipment	0	4,400,000
Contingent consideration fair value adjustments	4,600,000	900,000
Restructuring and divestiture charges	1,400,000	900,000
Operating expenses	294,900,000	309,000,000.0
Income from operations	885,500,000	124,800,000
Interest income	400,000	2,100,000
Interest expense	(28,100,000)	(32,800,000)
Debt extinguishment loss	(21,600,000)	0
Other income (expense), net	(3,800,000)	3,300,000
Income before income taxes	832,400,000	97,400,000
Provision (benefit) for income taxes	179,000,000.0	(288,400,000)
Net income	653,400,000	385,800,000
Net loss attributable to noncontrolling interest	(1,000,000.0)	(300,000)
Net income attributable to Hologic	$ 654,400,000	$ 386,100,000
Net income per common share attributable to Hologic:
Basic (in usd per share)	$ 2.53	$ 1.44
Diluted (in usd per share)	$ 2.50	$ 1.43
Weighted average number of shares outstanding:
Basic (in shares)	258,605	267,893
Diluted (in shares)	261,785	269,721