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Long-Term Debt and Commercial Paper (Tables)
9 Months Ended
Sep. 30, 2021
Debt Disclosure [Abstract]  
Long-Term Debt
Long-term debt consists of the following:
Debt DescriptionMaturity DateInterest PayableSeptember 30,
2021
December 31,
2020
3.35% Senior Notes
January 15, 2021January 15 and July 15$— $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 
1.95% Senior Notes
August 1, 2028February 1 and August 1400.0 — 
4.75% Senior Notes
June 1, 2030June 1 and December 1500.0 500.0 
2.4% Senior Notes
August 1, 2031February 1 and August 1450.0 — 
Revolving credit facilityMarch 26, 2025Monthly— — 
Finance leases and other debt
Various dates through 2040
153.3 116.6 
2,703.3 2,116.6 
Less: unamortized debt discounts and debt issuance costs(23.0)(14.8)
Less: current maturities(7.2)(309.2)
Long-term debt, net of current maturities$2,673.1 $1,792.6