Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Movement in Valuation Allowances and Reserves
Deferred tax asset valuation allowances	$ 33.9	$ 68.2
Cryobiological products business
Movement in Valuation Allowances and Reserves
Deferred tax asset valuation allowances	32.4
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves
Balance at beginning of period	8.5	8.1	$ 9.1
Additions - Charged to costs and expenses	0.4	0.2	(0.9)
Charged to other accounts	0.0	0.0	0.0
Deductions	0.0	0.0	0.0
Translations	(0.5)	0.2	(0.1)
Balance at end of period	8.4	8.5	8.1
Allowance for excess and obsolete inventory
Movement in Valuation Allowances and Reserves
Balance at beginning of period	10.6	8.9	7.9
Additions - Charged to costs and expenses	0.4	10.0	8.6
Charged to other accounts	0.0	0.0	0.0
Deductions	(0.5)	(8.0)	(7.4)
Translations	(0.8)	(0.3)	(0.2)
Balance at end of period	9.7	10.6	8.9
Deferred tax assets valuation allowance
Movement in Valuation Allowances and Reserves
Balance at beginning of period	68.2	65.2	26.8
Additions - Charged to costs and expenses	0.3	5.4	38.7
Charged to other accounts	0.0	5.3	0.0
Deductions	(36.6)	(5.9)	0.0
Translations	2.0	(1.8)	(0.3)
Balance at end of period	$ 33.9	$ 68.2	$ 65.2