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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Deferred tax assets        
Pension liabilities $ 26.9 $ 41.0    
Retirement benefits other than pensions 10.8 19.7    
Lease liabilities 99.5 88.2    
Workers’ compensation and other claims 26.3 27.1    
Property and equipment, net 42.3 44.3    
Other assets and liabilities 117.2 136.4    
Net operating loss carryforwards 54.4 57.2    
Interest limitations and other tax carryforwards(a) 80.2 48.8    
Foreign tax and other tax credits(b) 61.1 61.8    
Subtotal 518.7 524.5    
Valuation allowances (118.1) (128.0) $ (77.3) $ (141.5)
Total deferred tax assets 400.6 396.5    
Deferred tax liabilities        
Right-of-use assets, net 93.0 78.8    
Goodwill and other intangibles 101.1 110.8    
Other assets and miscellaneous 30.1 31.6    
Deferred tax liabilities 224.2 221.2    
Net deferred tax asset 176.4 175.3    
Included in:        
Noncurrent assets 239.2 231.8    
Noncurrent liabilities (62.8) (56.5)    
Operating Loss Carryforwards [Line Items]        
Interest limitations and other tax carryforwards 80.2 $ 48.8    
Foreign tax credit amount 60.4      
Other tax credit amount 0.5      
Tax credit carryforward valuation allowance 37.0      
United States        
Deferred tax assets        
Net operating loss carryforwards 0.0      
Interest limitations and other tax carryforwards(a) 54.0      
Operating Loss Carryforwards [Line Items]        
Interest limitations and other tax carryforwards 54.0      
Foreign        
Deferred tax assets        
Net operating loss carryforwards 41.7      
Interest limitations and other tax carryforwards(a) 26.2      
Operating Loss Carryforwards [Line Items]        
Interest limitations and other tax carryforwards $ 26.2