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Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2017
Fair Value Disclosures [Abstract]  
Schedule of losses (gains) on interest rate swaps
The following table shows the losses (gains) on our interest rate swap contracts:
 
 
 Year Ended December 31,
 
 
2017
 
2016
 
2015
Gains recorded in accumulated other comprehensive loss, net of tax
 
$
(4.2
)
 
$
(3.0
)
 
$
(1.6
)
Reclassifications of losses out of accumulated other comprehensive loss
 
7.3

 
8.2

 
5.2

Ineffectiveness recorded in interest expense
 
(0.3
)
 
—

 
—
Schedule of fair value hedges
The following table shows the fair value of our hedges:
 
As of December 31,
 
2017
 
2016
Accrued liabilities
$
0.2

 
$
6.7

Other long-term liabilities
—

 
0.2

Total fair value
$
0.2

 
$
6.9