Debt and Credit Arrangements (Tables)

6 Months Ended

Jun. 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	June 30, 2017				December 31, 2016
		Book Value		Fair Value 1		Book Value		Fair Value 1
2.25% Senior Notes due 2017 (less unamortized discount and issuance costs of $0.0 and $0.2, respectively)	2.30%	$	299.8	$	300.5	$	299.4	$	301.4
4.00% Senior Notes due 2022 (less unamortized discount and issuance costs of $1.5 and $1.2, respectively)	4.13%	247.3		259.0		247.0		258.4
3.75% Senior Notes due 2023 (less unamortized discount and issuance costs of $0.9 and $2.3, respectively)	4.32%	496.8		521.0		496.6		503.3
4.20% Senior Notes due 2024 (less unamortized discount and issuance costs of $0.7 and $2.8, respectively)	4.24%	496.5		526.6		496.2		511.6
Other notes payable and capitalized leases		44.4		44.4		65.4		65.4
Total long-term debt		1,584.8				1,604.6
Less: current portion		301.7				323.9
Long-term debt, excluding current portion		$	1,283.1			$	1,280.7

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