Leases - Schedule of Lease-Related Liabilities Recorded on the Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating lease liabilities:
Current portion included in accrued liabilities	$ 25.2
Noncurrent operating lease liabilities	238.5	$ 243.9
Total operating lease liabilities	263.7
Finance lease liabilities:
Current portion included in current maturities of long-term debt	1.1		$ 2.0
Long-term portion of lease liabilities in long-term debt	29.5		28.8
Total financing lease liabilities	30.6		30.8
Total lease liabilities	$ 294.3		$ 30.8
Weighted-average remaining lease term:
Weighted-average remaining lease term, operating leases	13 years
Weighted-average remaining lease term, finance leases	13 years
Weighted-average discount rate:
Weighted-average discount rate, operating leases	5.81%
Weighted-average discount rate, finance leases	5.08%