XML 65 R55.htm IDEA: XBRL DOCUMENT v3.21.1
Derivatives (Details) - Foreign Currency Forward
£ in Millions, $ in Millions
Mar. 31, 2021
GBP (£)
Mar. 31, 2021
USD ($)
Dec. 31, 2020
GBP (£)
Dec. 31, 2020
USD ($)
Derivative [Line Items]        
Derivative asset, notional amount | £ £ 55.0   £ 47.3  
Receivables        
Derivative [Line Items]        
Derivative asset | $   $ 3.8   $ 5.1