Debt and Credit Arrangements (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

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

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

	Effective Interest Rate	March 31, 2019				December 31, 2018
		Book Value		Fair Value 1		Book Value		Fair Value 1
3.50% Senior Notes due 2020 (less unamortized discount and issuance costs of $0.7 and $2.2, respectively)	3.89%	$	497.1	$	504.3	$	496.6	$	499.9
3.75% Senior Notes due 2021 (less unamortized discount and issuance costs of $0.3 and $2.7, respectively)	3.98%	497.0		508.4		496.8		503.2
4.00% Senior Notes due 2022 (less unamortized discount and issuance costs of $1.0 and $0.7, respectively)	4.13%	248.3		255.2		248.2		250.3
3.75% Senior Notes due 2023 (less unamortized discount and issuance costs of $0.6 and $1.6, respectively)	4.32%	497.8		507.5		497.7		491.4
4.20% Senior Notes due 2024 (less unamortized discount and issuance costs of $0.5 and $2.1, respectively)	4.24%	497.4		515.0		497.3		492.6
4.65% Senior Notes due 2028 (less unamortized discount and issuance costs of $1.6 and $4.2, respectively)	4.78%	494.2		521.2		494.0		494.1
5.40% Senior Notes due 2048 (less unamortized discount and issuance costs of $2.8 and $5.5, respectively)	5.48%	491.7		505.4		491.7		474.1
Term Loan due 2021 - LIBOR plus 1.25%		400.0		400.0		400.0		400.0
Other notes payable and capitalized leases		40.3		40.3		38.0		38.0
Total long-term debt		3,663.8				3,660.3
Less: current portion		0.1				0.1
Long-term debt, excluding current portion		$	3,663.7			$	3,660.2

1 See Note 14 for information on the fair value measurement of our long-term debt.