Fair Value Measurement Disclosures (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Estimated Fair Values of Financial Instruments

The estimated fair values of our financial instruments are as follows (in millions):

		September 30, 2018				December 31, 2017
	Fair Value	Carrying		Fair		Carrying		Fair
Description	Hierarchy	Amount		Value		Amount		Value
12.5% Senior Secured Notes due 2017 (note 8)	Level 2	$	249.9		252.1	$	260.3		269.1
10 3/4% Series B cumulative exchangeable      redeemable preferred stock (note 9)	Level 3		172.9		39.7		165.6		38.1