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Financial Instruments, Guarantees with Off-Balance-Sheet Risk and Other Guarantees (Tables)
 3 Months Ended
Mar. 31, 2015
Financial Instruments And Guarantees With Off Balance Sheet Risk Disclosure [Abstract]  
Financial instruments with off-balance sheet risk:
As of March 31, 2015, the Company had the following financial instruments with off-balance sheet risk:
 
Reclamation
Obligations
 
Lease
Obligations
 
Workers’
Compensation
Obligations
 
Other (1)
 
Total
 
(Dollars in millions)
Self bonding
$
1,382.9

 
$
—

 
$
—

 
$
—

 
$
1,382.9

Surety bonds
322.8

 
104.4

 
91.9

 
11.4

 
530.5

Bank guarantees
367.2

 
—

 
—

 
112.9

 
480.1

Letters of credit
17.6

 
—

 
43.8

 
227.8

 
289.2

 
$
2,090.5

 
$
104.4

 
$
135.7

 
$
352.1

 
$
2,682.7

(1) 
Other includes the $79.7 million in letters of credit related to Dominion Terminal Associates and TXU Europe Limited described below and an additional $272.4 million in bank guarantees, letters of credit and surety bonds related to collateral for road maintenance, performance guarantees and other operations.