Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Estimated Fair Value of Financial Instruments

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

	December 31, 2017						December 31, 2016
	Carrying amount			Estimated fair value			Carrying amount			Estimated fair value
Assets/(Liabilities), net:
Total debt, including current portion	$	(850.2	)	$	(850.8	)	$	(873.6	)	$	(873.7	)
Foreign currency contracts		(0.8	)		(0.8	)		1.3			1.3
Natural gas contracts		(0.6	)		(0.6	)		1.0			1.0
Interest rate swap contracts		8.9			8.9			6.9			6.9

Fair Value Measurement of Assets and Liabilities

The fair value measurement of assets and liabilities is summarized below:

	December 31, 2017						December 31, 2016
	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	$	(0.8	)	$	-		$	1.3	$	-
Natural gas contracts		-			(0.6	)		-		1.0
Interest rate swap contracts		-			8.9			-		6.9