v3.10.0.1
Financial Instruments (Tables)
 6 Months Ended
Jun. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Summary of outstanding fuel hedges
The following table summarizes our outstanding fuel hedges as of June 30, 2018:
Year
 
Gallons Hedged
 
Weighted Average Contract 
Price per Gallon
2018
 
3,750,000
 
$2.59
Assets and liabilities measured at fair value on a recurring basis
As of June 30, 2018 and December 31, 2017, our assets and liabilities that are measured at fair value on a recurring basis include the following:
 
 
 
Fair Value Measurements Using
 
Carrying Amount
 
Total as of June 30, 2018
 
Quoted
Prices in
Active
Markets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
Assets:
 
 
 
 
 
 
 
 
 
Money market mutual funds
$
42.8

 
$
42.8

 
$
42.8

 
$
—

 
$
—

Bonds - restricted cash and marketable securities and other assets
53.0

 
53.0

 
—

 
53.0

 
—

Fuel hedges - other current assets
2.6

 
2.6

 
—

 
2.6

 
—

Commodity hedges - other current assets
0.8

 
0.8

 
—

 
0.8

 
—

Interest rate locks - other assets
23.9

 
23.9

 
—

 
23.9

 
—

Total assets
$
123.1

 
$
123.1

 
$
42.8

 
$
80.3

 
$
—

Liabilities:
 
 
 
 
 
 
 
 
 
Interest rate swaps - other long-term liabilities
$
1.5

 
$
1.5

 
$
—

 
$
1.5

 
$
—

Contingent consideration - other long-term liabilities
72.7

 
72.7

 
—

 
—

 
72.7

Total liabilities
$
74.2

 
$
74.2

 
$
—

 
$
1.5

 
$
72.7


 
 
 
Fair Value Measurements Using
 
Carrying Amount
 
Total as of December 31, 2017
 
Quoted
Prices in
Active
Markets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
Assets:
 
 
 
 
 
 
 
 
 
Money market mutual funds
$
30.3

 
$
30.3

 
$
30.3

 
$
—

 
$
—

Bonds - restricted cash and marketable securities and other assets
92.1

 
92.1

 
—

 
92.1

 
—

Fuel hedges - other current assets
3.0

 
3.0

 
—

 
3.0

 
—

Interest rate swaps - other assets
8.0

 
8.0

 
—

 
8.0

 
—

Interest rate locks - other assets
19.1

 
19.1

 
—

 
19.1

 
—

Total assets
$
152.5

 
$
152.5

 
$
30.3

 
$
122.2

 
$
—

Liabilities:
 
 
 
 
 
 
 
 
 
Commodity hedges - other accrued liabilities
$
0.2

 
$
0.2

 
$
—

 
$
0.2

 
$
—

Contingent consideration- other long-term liabilities
73.3

 
73.3

 
—

 
—

 
73.3

Total liabilities
$
73.5

 
$
73.5

 
$
—

 
$
0.2

 
$
73.3