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Long-Term Debt And Commercial Paper (Narrative) (Details)
$ in Millions
6 Months Ended 12 Months Ended
Jul. 18, 2023
USD ($)
Jun. 30, 2023
USD ($)
Dec. 31, 2022
USD ($)
Debt Instrument [Line Items]      
Letters of credit, amount outstanding   $ 0.7  
Commercial paper, maximum aggregate amount outstanding permitted   1,000.0  
Commercial paper, amount outstanding   $ 465.0 $ 50.0
Commercial Paper      
Debt Instrument [Line Items]      
Weighted-average annual interest rate   5.73% 4.30%
Maximum | Commercial Paper      
Debt Instrument [Line Items]      
Maturity period of debt   397 days  
Weighted Average | Commercial Paper      
Debt Instrument [Line Items]      
Maturity period of debt   5 days 1 day
Revolving Credit Facility Due 2025      
Debt Instrument [Line Items]      
Maximum borrowing capacity under revolving credit facility   $ 1,800.0  
Debt Instrument Covenant Terms Maximum Leverage Ratio   3.75  
Revolving Credit Facility Due 2025 | Recourse      
Debt Instrument [Line Items]      
Revolving credit facility, amount outstanding   $ 0.0 $ 0.0
Revolving Credit Facility Due 2028 | Subsequent Event      
Debt Instrument [Line Items]      
Maximum borrowing capacity under revolving credit facility $ 1,900.0    
Debt Instrument Covenant Terms Maximum Leverage Ratio 4.25    
Additional borrowing capacity under accordion feature of revolving credit facility $ 500.0    
Revolving credit facilities letter of credit sublimit $ 200.0    
Revolving Credit Facility Due 2028 | Secured Overnight Financing Rate (SOFR) | Subsequent Event      
Debt Instrument [Line Items]      
Credit spread adjustment on SOFR borrowings under our revolving credit facility 0.10%    
Revolving Credit Facility Due 2028 | Minimum | Subsequent Event      
Debt Instrument [Line Items]      
Commitment fee on undrawn amounts (percent) 0.125%    
Revolving Credit Facility Due 2028 | Maximum | Subsequent Event      
Debt Instrument [Line Items]      
Commitment fee on undrawn amounts (percent) 0.20%    
Other Debt | Recourse      
Debt Instrument [Line Items]      
Finance leases and other debt obligations included in long-term debt   $ 369.3 $ 375.5
Line of Credit | Revolving Credit Facility Due 2025 | Recourse      
Debt Instrument [Line Items]      
Maturity date [1]   Mar. 26, 2025  
Line of Credit | Revolving Credit Facility Due 2028 | Recourse | Subsequent Event      
Debt Instrument [Line Items]      
Maturity date Jul. 18, 2028    
Line of Credit | Revolving Credit Facility Due 2028 | Minimum | Secured Overnight Financing Rate (SOFR) | Subsequent Event      
Debt Instrument [Line Items]      
Basis spread on variable interest rates (percent) 1.125%    
Line of Credit | Revolving Credit Facility Due 2028 | Minimum | Base Rate | Subsequent Event      
Debt Instrument [Line Items]      
Basis spread on variable interest rates (percent) 0.125%    
Line of Credit | Revolving Credit Facility Due 2028 | Maximum | Secured Overnight Financing Rate (SOFR) | Subsequent Event      
Debt Instrument [Line Items]      
Basis spread on variable interest rates (percent) 1.50%    
Line of Credit | Revolving Credit Facility Due 2028 | Maximum | Base Rate | Subsequent Event      
Debt Instrument [Line Items]      
Basis spread on variable interest rates (percent) 0.50%    
[1] * As described below under “Debt Refinancing Transaction,” we amended and restated our credit agreement on July 18, 2023, and extended the maturity date to July 18, 2028.