XML 85 R40.htm IDEA: XBRL DOCUMENT v3.21.2
Other Financial Statement Information - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Other Financial Information [Abstract]          
Contract with customer liability $ 154.0   $ 154.0   $ 130.1
Contract with customer liability revenue recognized $ 79.4 $ 64.8 $ 121.9 $ 98.5