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Income Taxes (Narrative) (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Income Tax Disclosure [Abstract]          
Effective income tax rates 23.10% 28.40% 23.60% 8.90%  
Deferred tax asset valuation allowance $ 27.9   $ 27.9   $ 27.9
Liabilities for income taxes associated with uncertain tax positions 34.6   34.6   31.6
Offsetting tax benefits related to uncertain tax positions $ 3.8   $ 3.8   $ 3.7
Unrecognized tax positions increase decrease, months     It is reasonably possible that the unrecognized benefit with respect to certain of the Company’s unrecognized tax positions may increase or decrease within the next 12 months. Any such change may be the result of either ongoing audits or the expiration of federal and state statutes of limitations for the assessment of taxes.    
Minimum tax rate in jurisdictions which it operates percentage subject to international anti-base erosion rules     15.00%    
Percentage of bonus depreciation for assets placed in service impact tax reform     100.00%