Other Financial Statement Captions (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Other current assets
Prepaid expenses	$ 35.1	$ 27.4
Current corporation tax	2.1	9.5
Derivatives	9.1	26.0
Other current assets	64.8	53.1
Total other current assets	111.1	116.0
Other non-current assets	157.7	149.3
Other accrued liabilities
Accrued distribution commissions	40.6	50.8
Accrued rebates	37.2	28.5
Other accrued liabilities	53.4	52.5
Total other accrued liabilities	131.2	131.8
Accounts payable and accrued liabilities
Current corporation tax (including interest)	19.8	12.6
Leases	27.3	25.7
Contingent consideration		14.3
Derivatives	18.7	35.3
Other current liabilities	35.1	26.3
Total accounts payable and accrued liabilities	232.1	246.0
Other non-current liabilities
Non-current tax liabilities (including interest)	16.1	14.9
Leases	117.9	129.5
Other creditors	10.3	7.5
Contingent consideration		6.9
Total other non-current liabilities	$ 144.3	$ 158.8