XML 121 R105.htm IDEA: XBRL DOCUMENT v3.21.1
Operating Leases - Schedule of Operating Lease Costs (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Leases [Abstract]      
Amortization of right-of-use operating lease assets $ 11.8 $ 13.4 $ 0.0
Interest on operating lease liability 5.5 4.6  
Operating lease charge $ 17.3 $ 18.0 $ 0.0