Acquisitions - Canopy Biosciences (Details) - USD ($) $ in Millions	Sep. 10, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allocation of Consideration Transferred:
Operating lease assets		$ 67.4	$ 65.6
Goodwill		$ 320.4	$ 293.0	$ 275.7	$ 169.8
Canopy Biosciences
Business Acquisition [Line Items]
Purchase price	$ 24.2
Potential additional consideration	5.0
Consideration Transferred:
Cash paid	24.4
Contingent consideration	0.5
Cash acquired	(0.5)
Working capital adjustment	0.3
Total consideration transferred	24.7
Allocation of Consideration Transferred:
Inventories	1.1
Accounts receivable	1.2
Other current and non-current assets	1.0
Property, plant and equipment	0.9
Operating lease assets	0.3
Goodwill	12.0
Deferred taxes, net	(2.0)
Liabilities assumed	(2.6)
Total consideration transferred	24.7
Canopy Biosciences | Technology
Allocation of Consideration Transferred:
Intangible assets	$ 5.7
Canopy Biosciences | Customer relationships
Business Acquisition [Line Items]
Amortization period for intangible assets acquired	10 years
Allocation of Consideration Transferred:
Intangible assets	$ 6.1
Canopy Biosciences | Trade name
Business Acquisition [Line Items]
Amortization period for intangible assets acquired	8 years
Allocation of Consideration Transferred:
Intangible assets	$ 0.7
Canopy Biosciences | Backlog
Business Acquisition [Line Items]
Amortization period for intangible assets acquired	1 year
Allocation of Consideration Transferred:
Intangible assets	$ 0.3