XML 109 R98.htm IDEA: XBRL DOCUMENT v3.20.2
Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Parenthetical) (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]        
Gain on derivative instruments, tax $ (8.0) $ 5.0 $ 8.0 $ 10.7