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Other Assets - Other Assets (Detail) - USD ($)
$ in Millions
Sep. 30, 2022
Dec. 31, 2021
Other noncurrent assets:    
Note receivables - OPA $ 43.5 $ 38.7
Restricted cash and cash equivalents 36.5 41.9
Land held for development 28.0 36.0
Operating lease right-of-use assets 20.3 19.9
IBNR receivables 19.2 34.4
Pension asset 7.8 9.0
Marketable securities 3.6 3.3
Other 16.2 16.8
Total $ 175.1 $ 200.0