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Income Taxes - Components of Net Deferred Income Taxes (Detail) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]    
Lease assets (liabilities) $ 5.3 $ 5.0
Accrued OPEB costs, Assets 1.7 2.3
Accrued pension costs, Assets 21.6 73.6
Other accrued liabilities and deductible differences, Assets 15.3 12.1
Tax loss and tax credit carryforwards, Assets 70.7 78.1
Valuation allowance, Assets (3.8) (7.4)
Adjusted gross deferred tax assets 110.8 163.7
Netting by tax jurisdiction, Assets (58.8) (56.9)
Net noncurrent deferred tax asset 52.0 106.8
Inventories, Liabilities (5.5) (2.9)
Property and equipment, Liabilities (59.1) (62.5)
Lease liabilities (5.4) (5.1)
Other taxable differences, Liabilities (3.9) (3.3)
Tax on unremitted earnings of non-U.S. subsidiaries, Liabilities (11.3) (11.2)
Adjusted gross deferred tax assets (liabilities) (85.2) (85.0)
Netting by tax jurisdiction, Liabilities 58.8 56.9
Net noncurrent deferred tax asset (liability) $ (26.4) $ (28.1)