Debt and Credit Arrangements (Tables)

9 Months Ended

Sep. 30, 2017

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, 2017				December 31, 2016
		Book Value		Fair Value 1		Book Value		Fair Value 1
2.25% Senior Notes due 2017 (less unamortized issuance costs of $0.1)	2.30%	$	299.9	$	300.2	$	299.4	$	301.4
4.00% Senior Notes due 2022 (less unamortized discount and issuance costs of $1.4 and $1.1, respectively)	4.13%	247.5		258.5		247.0		258.4
3.75% Senior Notes due 2023 (less unamortized discount and issuance costs of $0.8 and $2.2, respectively)	4.32%	497.0		520.5		496.6		503.3
4.20% Senior Notes due 2024 (less unamortized discount and issuance costs of $0.7 and $2.7, respectively)	4.24%	496.6		527.0		496.2		511.6
Other notes payable and capitalized leases		45.9		45.9		65.4		65.4
Total long-term debt		1,586.9				1,604.6
Less: current portion		301.9				323.9
Long-term debt, excluding current portion		$	1,285.0			$	1,280.7

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