Discontinued Operations - Income from Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Summarized Financial Information of Discontinued Operations
Income from discontinued operations, net of tax	$ 0.0	$ 6.3	$ 0.0	$ 12.7
Disposed of by held for sale
Summarized Financial Information of Discontinued Operations
Depreciation expense, discontinued operations		0.3		0.6
Disposed of by held for sale \| Cryobiological products business
Summarized Financial Information of Discontinued Operations
Sales		20.9		40.1
Cost of sales		11.8		21.9
Selling, general and administrative expenses		1.5		2.9
Operating income		7.6		15.3
Income before income taxes from discontinued operations		8.0		15.7
Income tax expense		1.7		3.0
Income from discontinued operations, net of tax		$ 6.3		$ 12.7

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Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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