Other Current and Non-Current Liabilities - Components of Other Current and Other Non-Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Other current liabilities:
Accrued salaries, wages and related costs	$ 191.5	$ 164.9
Accrued operating expenses	197.2	135.8
Accrued customer volume rebates	78.3	84.6
Accrued interest	41.6	38.2
Accrued employee benefit liability	5.5	5.4
Total	514.1	428.9
Other non-current liabilities:
Accrued employee benefit liability	178.5	172.0
Other postretirement liability	38.2	41.3
Uncertain tax position liability	384.0	339.9
Other various liabilities	129.5	100.1
Total	$ 730.2	$ 653.3