Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

Summary of Components of AOCI

Accumulated other comprehensive income (loss) includes foreign currency translation adjustments from those subsidiaries not using the U.S. dollar as their functional currency and the cumulative gains and losses of derivative instruments that qualify as cash flow hedges. The following table provides a roll forward of accumulated other comprehensive income (loss) for the years ended December 31, 2017 and 2016 (in millions):

	2017			2016
Accumulated other comprehensive income (loss) as of January 1,	$	(3.0	)	$	(4.2	)
Foreign currency translation (gain) loss		(0.1	)		—
Change in fair value of interest rate swap agreements		2.3			1.9
Swap termination		2.5			—
Income tax (expense) benefit		(1.8	)		(0.7	)
Other comprehensive income (loss), net of tax		2.9			1.2
Accumulated other comprehensive income (loss) as of December 31,	$	(0.1	)	$	(3.0	)