XML 59 R49.htm IDEA: XBRL DOCUMENT v3.21.2
Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance $ 811.2 $ 801.3 $ 796.5 $ 816.1
Ending Balance 822.0 801.7 822.0 801.7
Currency Translation        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance (229.4) (270.7) (233.4) (246.8)
Other comprehensive income (loss) (7.8) 10.1 (3.8) (13.8)
Ending Balance (237.2) (260.6) (237.2) (260.6)
Accumulated Defined Benefit Plans Adjustment | Defined Benefit Pension Plans        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance (207.5) (196.1) (214.5) (202.2)
Other comprehensive income (loss) 3.5 3.1 10.5 9.2
Ending Balance (204.0) (193.0) (204.0) (193.0)
Accumulated Defined Benefit Plans Adjustment | OPEB Plans        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance (0.4) 0.1 (0.3) 0.2
Other comprehensive income (loss) (0.1) (0.1) (0.2) (0.2)
Ending Balance (0.5)   (0.5)  
Total Accumulated Other Comprehensive Loss        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance (437.3) (466.7) (448.2) (448.8)
Other comprehensive income (loss) (4.4) 13.1 6.5 (4.8)
Ending Balance $ (441.7) $ (453.6) $ (441.7) $ (453.6)