Fair value of financial instruments (Tables)

12 Months Ended

Dec. 31, 2015

Fair value of financial instruments

Schedule of estimated carrying values and fair values of financial instruments


		December 31,
		2015						2014
		Carrying						Carrying
		Amount			Fair Value			Amount			Fair Value
Cash and cash equivalents		$	72.4		$	72.4		$	106.0		$	106.0
Restricted cash			15.2			15.2			22.5			22.5
Derivative assets non-current			0.3			0.3			1.1			1.1
Derivative liabilities current			36.7			36.7			36.1			36.1
Derivative liabilities non-current			20.8			20.8			47.5			47.5
Long-term debt, including current portion			733.3			686.5			1,165.9			1,119.5
Convertible debentures			285.4			231.4			340.6			269.9

Schedule of recurring measurements of fair value hierarchy of financial assets and liabilities


		December 31, 2015
		Level 1			Level 2			Level 3			Total
Assets:
Cash and cash equivalents		$	72.4		$	—		$	—		$	72.4
Restricted cash			15.2			—			—			15.2
Derivative instruments asset			—			0.3			—			0.3
Total		$	87.6		$	0.3		$	—		$	87.9
Liabilities:
Derivative instruments liability		$	—		$	57.5		$	—		$	57.5
Total		$	—		$	57.5		$	—		$	57.5


		December 31, 2014
		Level 1			Level 2			Level 3			Total
Assets:
Cash and cash equivalents		$	106.0		$	—		$	—		$	106.0
Restricted cash			22.5			—			—			22.5
Derivative instruments asset			—			1.1			—			1.1
Total		$	128.5		$	1.1		$	—		$	129.6
Liabilities:
Derivative instruments liability		$	—		$	83.6		$	—		$	83.6
Total		$	—		$	83.6		$	—		$	83.6