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Income Taxes (Narrative) (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Income Tax Disclosure [Abstract]          
Effective income tax rates 29.40% 174.20% 23.20% 21.40%  
Liabilities for income taxes associated with uncertain tax positions $ 1.0   $ 1.0   $ 3.2
Offsetting Tax Benefits To Liabilities For Income Taxes Associated With Uncertain Tax Positions $ 0.2   $ 0.2   $ 2.2
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 income tax on certain large corporations percentage as part of Inflation Reduction Act     15.00%    
Excise tax percentage on corporate stock repurchases as part of Inflation Reduction Act     1.00%