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Investments - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]      
Total assets of variable interest entities $ 38,907.8 $ 33,345.0 $ 22,331.4
Total liabilities of variable interest entities $ 29,717.6 24,784.9  
Ownership interest held 50.00%    
Variable Interest Entity, Not Primary Beneficiary [Member]      
Schedule of Equity Method Investments [Line Items]      
Ownership interest held 12.00%    
Chem-Mod Clean-Coal Venture [Member] | VIE [Member]      
Schedule of Equity Method Investments [Line Items]      
Total assets of variable interest entities $ 14.8 19.4  
Total liabilities of variable interest entities 1.1 1.1  
Chem-Mod Clean-Coal Venture - U.S. and Canadian Operations [Member]      
Schedule of Equity Method Investments [Line Items]      
Total revenues of limited liability companies 1.0 82.7  
Total expenses of limited liability companies $ 5.7 $ 14.5  
Chem-Mod International LLC [Member]      
Schedule of Equity Method Investments [Line Items]      
Ownership interest held 31.50%    
Chem Mod L L C [Member]      
Schedule of Equity Method Investments [Line Items]      
Ownership interest held 46.50%