XML 91 R81.htm IDEA: XBRL DOCUMENT v3.21.2
Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Parenthetical) (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]        
Gain on derivative instruments, tax $ 0.0 $ (0.2) $ 0.1 $ 16.0