Debt and Credit Arrangements (Tables)

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Summary of Carrying Amounts and Fair Values of Long-term Debt

A summary of the carrying amounts of our long-term debt is listed below.

	Effective Interest Rate	September 30, 2020		December 31, 2019
3.50% Senior Notes due 2020 (less unamortized discount and issuance costs of $0.0 and $0.0, respectively)	3.89%	$	500.0	$	498.5
3.75% Senior Notes due 2021 (less unamortized discount and issuance costs of $0.1 and $1.1, respectively)	3.98%	498.8		497.9
4.00% Senior Notes due 2022 (less unamortized discount and issuance costs of $0.4 and $0.4, respectively)	4.13%	249.2		248.7
3.75% Senior Notes due 2023 (less unamortized discount and issuance costs of $0.4 and $1.0, respectively)	4.32%	498.6		498.2
4.20% Senior Notes due 2024 (less unamortized discount and issuance costs of $0.4 and $1.5, respectively)	4.24%	498.1		497.8
4.65% Senior Notes due 2028 (less unamortized discount and issuance costs of $1.4 and $3.6, respectively)	4.78%	495.0		494.6
4.75% Senior Notes due 2030 (less unamortized discount and issuance costs of $3.7 and $5.8, respectively)	4.92%	640.5		—
5.40% Senior Notes due 2048 (less unamortized discount and issuance costs of $2.7 and $5.2, respectively)	5.48%	492.1		491.9
Other notes payable and capitalized leases		45.6		46.3
Total long-term debt		3,917.9		3,273.9
Less: current portion		506.6		502.0
Long-term debt, excluding current portion		$	3,411.3	$	2,771.9