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Changes in Accumulated Other Comprehensive Income (Loss) by Component (Tables)
 12 Months Ended
Dec. 31, 2018
Equity [Abstract]  
Summary of changes in accumulated other comprehensive income (loss) by component A summary of changes in accumulated other comprehensive income (loss), net of tax, by component, for the years ended December 31, 2018, 2017 and 2016 follows:
 
Cash Flow
Hedges
 
Defined Benefit Pension Plan
 
Total
Balance as of December 31, 2015
$
(41.6
)
 
$
11.1

 
$
(30.5
)
Other comprehensive income before reclassifications
11.8

 
6.4

 
18.2

Amounts reclassified from accumulated other comprehensive loss
26.5

 
—

 
26.5

Net current period other comprehensive income
38.3

 
6.4

 
44.7

Balance as of December 31, 2016
(3.3
)
 
17.5

 
14.2

Other comprehensive (loss) income before reclassifications
(0.6
)
 
3.7

 
3.1

Amounts reclassified from accumulated other comprehensive income
5.3

 
—

 
5.3

Net current period other comprehensive income
4.7

 
3.7

 
8.4

Balance as of December 31, 2017
1.4

 
21.2

 
22.6

Other comprehensive income (loss) before reclassifications
18.5

 
(6.5
)
 
12.0

Amounts reclassified from accumulated other comprehensive income
(3.8
)
 
—

 
(3.8
)
Net current period other comprehensive income (loss)
14.7

 
(6.5
)
 
8.2

Balance as of December 31, 2018
$
16.1

 
$
14.7

 
$
30.8
Schedule of reclassifications out of accumulated other comprehensive income (loss) A summary of reclassifications out of accumulated other comprehensive income (loss) for the years ended December 31, 2018, 2017 and 2016 follows:


 
Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
 
 
 
Details about Accumulated Other Comprehensive Income (Loss) Components
 
2018
 
2017
 
2016
 
Affected Line Item in the Statement Where Net Income is Presented
Gain (loss) on cash flow hedges:
 
 
 
 
 
 
 
 
 
Recycling commodity hedges
 
$
1.1

 
$
(2.8
)
 
$
—

 
Revenue
Fuel hedges
 
4.3

 
(3.3
)
 
(34.1
)
 
Cost of operations
Terminated interest rate locks
 
(0.3
)
 
(2.7
)
 
(9.8
)
 
Interest expense
 
 
5.1

 
(8.8
)
 
(43.9
)
 
Total before tax
 
 
(1.3
)
 
3.5

 
17.4

 
Tax (expense) benefit
 
 
3.8

 
(5.3
)
 
(26.5
)
 
Net of tax
Total gain (loss) reclassified into earnings
 
$
3.8

 
$
(5.3
)
 
$
(26.5
)