Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Estimated Fair Value of Financial Instruments

The estimated fair values of our financial instruments are as follows: 

	March 31, 2018						December 31, 2017
	Carrying amount			Estimated fair value			Carrying amount			Estimated fair value
Assets/(Liabilities), net:
Total long-term debt, including current portion	$	(842.6	)	$	(847.1	)	$	(850.2	)	$	(850.8	)
Foreign currency contracts		(0.2	)		(0.2	)		(0.8	)		(0.8	)
Natural gas contracts		(0.2	)		(0.2	)		(0.6	)		(0.6	)
Interest rate swap contracts		12.6			12.6			8.9			8.9

Fair Value Measurement of Assets and Liabilities

The fair value measurement of assets and liabilities measured at fair value on a recurring basis and reported on the consolidated balance sheets is summarized below: 

	March 31, 2018						December 31, 2017
	Fair value based on						Fair value based on
	Quoted, active markets			Other observable inputs			Quoted, active markets			Other observable inputs
	Level 1			Level 2			Level 1			Level 2
Assets/(Liabilities), net:
Foreign currency contracts	$	(0.2	)	$	-		$	(0.8	)	$	-
Natural gas contracts		-			(0.2	)		-			(0.6	)
Interest rate swap contracts		-			12.6			-			8.9