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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Income Tax Disclosure [Abstract]    
Reserves for discontinued operations, environmental and restructuring $ 144.7 $ 121.4
Accrued pension and other postretirement benefits 9.8 9.6
Capital loss, foreign tax and other credit carryforwards 1,136.0 3.5
Net operating loss carryforwards 411.2 315.2
Deferred expenditures capitalized for tax 94.5 71.3
Other accruals and reserves 234.0 219.3
Deferred tax assets 2,030.2 740.3
Valuation allowance, net (588.4) (457.6)
Deferred tax assets, net of valuation allowance 1,441.8 282.7
Intangibles, Property, plant and equipment, and Investments, net 263.3 393.5
Deferred tax liabilities 263.3 393.5
Deferred income taxes $ 1,178.5  
Net deferred tax assets (liabilities)   $ (110.8)