Debt and Credit Arrangements (Tables)

9 Months Ended

Sep. 30, 2016

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	September 30, 2016				December 31, 2015
		Book Value		Fair Value 1		Book Value		Fair Value 1
2.25% Senior Notes due 2017 (less unamortized discount and issuance costs of $0.2 and $0.5, respectively)	2.30%	$	299.3	$	301.5	$	298.8	$	299.3
4.00% Senior Notes due 2022 (less unamortized discount and issuance costs of $1.7 and $1.4, respectively)	4.13%	246.9		266.8		246.4		250.9
3.75% Senior Notes due 2023 (less unamortized discount and issuance costs of $1.0 and $2.6, respectively)	4.32%	496.4		524.9		496.0		484.8
4.20% Senior Notes due 2024 (less unamortized discount and issuance costs of $0.8 and $3.1, respectively)	4.24%	496.1		539.0		495.8		496.4
Other notes payable and capitalized leases		69.1		69.1		75.2		75.2
Total long-term debt		1,607.8				1,612.2
Less: current portion		24.5				1.9
Long-term debt, excluding current portion		$	1,583.3			$	1,610.3

1 See Note 11 for information on the fair value measurement of our long-term debt.