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Financial Instruments and Guarantees with Off-Balance-Sheet Risk (Tables)
 3 Months Ended
Mar. 31, 2014
Financial Instruments And Guarantees With Off Balance Sheet Risk Disclosure [Abstract]  
Financial instruments with off-balance sheet risk:
As of March 31, 2014, 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
$
1,365.1

 
$
—

 
$
—

 
$
—

 
$
1,365.1

Surety bonds
328.1

 
111.2

 
103.9

 
9.9

 
553.1

Bank guarantees
266.5

 
—

 
—

 
140.4

 
406.9

Letters of credit
17.6

 
—

 
31.1

 
105.6

 
154.3

 
$
1,977.3

 
$
111.2

 
$
135.0

 
$
255.9

 
$
2,479.4

(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 $176.2 million in bank guarantees, letters of credit and surety bonds related to collateral for road maintenance, performance guarantees and other operations.