XML 50 R39.htm IDEA: XBRL DOCUMENT v3.21.1
Fair Value Measurements (Financial Instruments Recorded at Fair Value) (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Cash and cash equivalents $ 163.3 $ 152.0  
Cash and cash equivalents 163.3 152.0 $ 109.2
Deferred compensation asset 2.5 2.4  
Deferred compensation obligation 2.4 2.3  
Level 1 [Member]      
Cash and cash equivalents   152.0  
Deferred compensation asset 2.5 2.4  
Deferred compensation obligation $ 2.4 $ 2.3