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Long-Term Debt and Commercial Paper (Tables)
12 Months Ended
Dec. 31, 2020
Debt Disclosure [Abstract]  
Long-term debt
Long-term debt at December 31 consisted of the following:
Debt DescriptionMaturity DateInterest Payable20202019
5.5% Senior Notes
February 1, 2020February 1 and August 1$— $350.0 
3.35% Senior Notes
January 15, 2021January 15 and July 15300.0 300.0 
3.5% Senior Notes
November 15, 2024May 15 and November 15450.0 450.0 
4.5% Senior Notes
October 1, 2025April 1 and October 1450.0 450.0 
3.8% Senior Notes
November 15, 2027May 15 and November 15300.0 300.0 
4.75% Senior Notes
June 1, 2030June 1 and December 1 500.0 — 
Revolving credit facilityMarch 26, 2025Monthly— — 
Finance leases and other debtVarious dates through 2040Monthly116.6 93.9 
2,116.6 1,943.9 
Less: unamortized debt discounts and debt issuance costs(14.8)(9.8)
Less: current maturities(309.2)(355.6)
Long-term debt, net of current maturities$1,792.6 $1,578.5 
Aggregate maturities of non-vehicle long-term debt
At December 31, 2020, aggregate maturities of non-vehicle long-term debt were as follows:
Year Ending December 31:
2021$307.6 
20225.7 
20235.8 
2024456.1 
2025456.7 
Thereafter884.7 
$2,116.6