v3.26.3
Basis of Presentation - Additional Information (Detail) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Equity method investment Contribution $ 464.2 $ 44.7  
Contributions to joint venture 51.7 $ 44.7  
Equity Method Investments $ 417.4   $ 379.4
PACCAR      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Equity method investment, ownership percentage 30.00%    
Maximum      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Equity method investment Contribution $ 830.0    
ASU 2025-05      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Change in accounting principle, accounting standards update, adopted [true false] true    
Change in accounting principle, accounting standards update adoption date Jan. 01, 2026    
Change in accounting principle, accounting standards update, immaterial effect [true false] true    
ASU 2025-09      
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]      
Change in accounting principle, accounting standards update, adopted [true false] true    
Change in accounting principle, accounting standards update adoption date Jan. 01, 2026    
Change in accounting principle, accounting standards update, immaterial effect [true false] true