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Principal Accounting Policies and Related Financial Information - Adjusted Changes in Equity to Apply Adopted Guidance (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity $ 3,400.9 $ 3,143.7 $ 3,084.2 $ 2,665.6
Accumulated other comprehensive income (loss) (459.6) (325.5)    
Retained Earnings        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity 5,555.9 5,092.9 4,604.9 4,286.4
Accumulated Other Comprehensive Income (Loss)        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity (459.6) (325.5) (280.7) (405.4)
Accumulated other comprehensive income (loss) (459.6)      
Previously Reported        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity 3,309.1 3,051.9 2,984.2 2,561.4
Accumulated other comprehensive income (loss) (444.0) (315.7)    
Previously Reported | Retained Earnings        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity   4,991.3 4,506.4 4,188.8
Previously Reported | Accumulated Other Comprehensive Income (Loss)        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity   (315.7) (282.2) (412.0)
Effect of Change        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity 91.8      
Accumulated other comprehensive income (loss) (15.6)      
Effect of Change | Combined Effect of Changes        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity 91.8 91.8 100.0 104.2
Accumulated other comprehensive income (loss)   (9.8)    
Effect of Change | Combined Effect of Changes | Retained Earnings        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity 107.4 101.6 98.5 97.6
Effect of Change | Combined Effect of Changes | Accumulated Other Comprehensive Income (Loss)        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity (15.6) (9.8) 1.5 6.6
Effect of Change | Effect of FIFO Change        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity   91.8 100.0 104.2
Accumulated other comprehensive income (loss)   0.0    
Effect of Change | Effect of FIFO Change | Retained Earnings        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity   91.8 100.0 104.2
Effect of Change | Effect of FIFO Change | Accumulated Other Comprehensive Income (Loss)        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity   0.0 0.0 0.0
Effect of Change | Effect of Pension Change        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity   0.0 0.0 0.0
Accumulated other comprehensive income (loss)   (9.8)    
Effect of Change | Effect of Pension Change | Retained Earnings        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity   9.8 (1.5) (6.6)
Effect of Change | Effect of Pension Change | Accumulated Other Comprehensive Income (Loss)        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity   $ (9.8) $ 1.5 $ 6.6
Effect of Change | As computed under LIFO and Pension deferred MRVA Method        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity 3,309.1      
Effect of Change | As computed under LIFO and Pension deferred MRVA Method | Retained Earnings        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity 5,448.5      
Effect of Change | As computed under LIFO and Pension deferred MRVA Method | Accumulated Other Comprehensive Income (Loss)        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total equity $ (444.0)