Debt and Credit Arrangements (Tables)

6 Months Ended

Jun. 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	June 30, 2020		December 31, 2019
3.50% Senior Notes due 2020 (less unamortized discount and issuance costs of $0.1 and $0.4, respectively)	3.89%	$	499.5	$	498.5
3.75% Senior Notes due 2021 (less unamortized discount and issuance costs of $0.2 and $1.3, respectively)	3.98%	498.5		497.9
4.00% Senior Notes due 2022 (less unamortized discount and issuance costs of $0.6 and $0.4, respectively)	4.13%	249.0		248.7
3.75% Senior Notes due 2023 (less unamortized discount and issuance costs of $0.4 and $1.1, respectively)	4.32%	498.5		498.2
4.20% Senior Notes due 2024 (less unamortized discount and issuance costs of $0.4 and $1.6, respectively)	4.24%	498.0		497.8
4.65% Senior Notes due 2028 (less unamortized discount and issuance costs of $1.4 and $3.7, respectively)	4.78%	494.9		494.6
4.75% Senior Notes due 2030 (less unamortized discount and issuance costs of $3.7 and $6.0, respectively)	4.92%	640.3		—
5.40% Senior Notes due 2048 (less unamortized discount and issuance costs of $2.7 and $5.3, respectively)	5.48%	492.0		491.9
Other notes payable and capitalized leases		44.0		46.3
Total long-term debt		3,914.7		3,273.9
Less: current portion		503.0		502.0
Long-term debt, excluding current portion		$	3,411.7	$	2,771.9