Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating Leased Assets [Line Items]
Lease cost	$ 60.9
Lessee, Operating Lease, Liability, Payments, Due	223.6
Lonza Group AG [Member]
Operating Leased Assets [Line Items]
Other Commitment		$ 1,084.6
Lessee, Operating Lease, Liability, Payments, Due		$ 88.7
Inventory [Member]
Operating Leased Assets [Line Items]
Lease cost	$ 15.6