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Cash, Cash Equivalents and Restricted Cash (Tables)
 6 Months Ended
Jun. 30, 2018
Cash, Cash Equivalents and Restricted Cash [Abstract]  
Schedule of Cash and Cash Equivalents
The following table summarizes the Company’s cash, cash equivalents and restricted cash as presented on the unaudited condensed consolidated balance sheet to amounts on the condensed consolidated statement of cash flows (in millions):
 
June 30, 2018
 
December 31, 2017
 
 
 
 
Cash and cash equivalents
$
140.1

 
$
208.8

Restricted cash included in other current assets
16.4

 
16.3

Restricted cash included in other long-term assets
19.8

 
19.7

Total cash, cash equivalents and restricted cash
$
176.3

 
$
244.8
Restrictions on Cash and Cash Equivalents
The following provides additional detail regarding the Company’s restricted cash (in millions):
 
June 30,
 2018
 
December 31, 2017
Current assets
 
 
 
Deposits for surety bonds - NRC
$
16.2

 
$
16.1

Deposits for financial assurance - other
0.2

 
0.2

Included in other current assets
$
16.4

 
$
16.3

 
 
 
 
Long-term assets
 
 
 
Deposits for surety bonds - DOE
$
13.6

 
$
13.5

Deposits for financial assurance - workers compensation
5.9

 
5.9

Deposits for financial assurance - other
0.3

 
0.3

Deposits for financial assurance
$
19.8

 
$
19.7