Debt and Credit Arrangements (Tables)

3 Months Ended

Mar. 31, 2016

Long-term Debt, Unclassified [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, 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 $0.8)	2.30%	$	299.0	$	299.7	$	298.8	$	299.3
4.00% Senior Notes due 2022 (less unamortized discount and issuance costs of $1.9 and $1.5)	4.13%	246.6		257.5		246.4		250.9
3.75% Senior Notes due 2023 (less unamortized discount and issuance costs of $1.1 and $2.8)	4.32%	496.1		497.1		496.0		484.8
4.20% Senior Notes due 2024 (less unamortized discount and issuance costs of $0.8 and $3.3)	4.24%	495.9		517.2		495.8		496.4
Other notes payable and capitalized leases		74.3		74.3		75.2		75.2
Total long-term debt		1,611.9				1,612.2
Less: current portion		2.0				1.9
Long-term debt, excluding current portion		$	1,609.9			$	1,610.3

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