Discontinued Operations - Income for Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Income from discontinued operations, net of tax	$ 220.3	$ 6.1	$ 6.4	$ 6.4	$ (4.1)	$ 5.0	$ 8.1	$ 6.0	$ 239.2	$ 15.0	$ 55.5
Disposed of by held for sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Sales									59.9	83.6	237.5
Cost of sales									31.8	44.3	159.5
Selling, general and administrative expenses									7.8	10.4	41.9
Amortization expense									0.0	0.0	2.3
Operating income									20.3	28.9	33.8
Interest expense, net									7.4	10.6	3.2
Other (income) expense, net									(0.8)
Other (income) expense, net										0.1	0.4
Income before income taxes									13.7	18.2	30.2
Income tax (benefit) expense									(1.3)	3.2	9.0
Income from discontinued operations before gain on sale of businesses									15.0	15.0	21.2
Gain on sale of business, net of taxes	$ 224.2								224.2	0.0	34.3
Depreciation expense, discontinued operations									0.7	1.1	2.7
Assets disposed of by sales | Cryobiological products business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Interest expense, net									7.4	$ 10.6
Gain on sale of business, net of taxes									224.2
Tax on gain on sale of business									$ 25.2
Assets disposed of by sales | BioMedical
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Interest expense, net											3.2
Gain on sale of business, net of taxes											34.3
Tax on gain on sale of business											$ 2.6