DEBT (Tables)

12 Months Ended

Dec. 31, 2015

DEBT

Components of debt

Debt at December 31, 2015 and 2014, consisted of the following (in millions):

	December 31, 2015				December 31, 2014
	Carrying value		Fair value		Carrying value		Fair value
4.875% Senior Notes due 2025	$	297.2	$	307.6	$	—	$	—
0.750% Convertible Senior Notes due 2018		108.9		158.6		106.0		177.2
6.700% Senior Notes due 2017		—		—		344.5		380.8
Total debt		406.1		466.2		450.5		558.0
Less: Current maturities		108.9		158.6		—		—
Total long-term debt	$	297.2	$	307.6	$	450.5	$	558.0

Schedule of aggregate maturities of indebtedness

The aggregate amounts of debt maturing or callable in the next five years are as follows (in millions):

Year ended December 31,		Amount
2016		$	—
2017			—
2018 (1)			158.6
2019			—
2020			—
Thereafter			300.0
Total		$	458.6
(1)	Represents the fair value of the 2018 Convertible Notes as of December 31, 2015.