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Financial Instruments, Guarantees with Off-Balance-Sheet Risk and Other Guarantees (Tables)
 9 Months Ended
Sep. 30, 2015
Financial Instruments And Guarantees With Off Balance Sheet Risk Disclosure [Abstract]  
Financial instruments with off-balance sheet risk:
As of September 30, 2015, the Company had the following financial instruments with off-balance sheet risk:
 
Reclamation
Obligations
 
Lease
Obligations
 
Workers’
Compensation
Obligations
 
Other (1)
 
Total
 
Letters of Credit in Support of Financial Instruments
 
(Dollars in millions)
Self bonding
$
1,470.0

 
$
—

 
$
—

 
$
—

 
$
1,470.0

 
$
—

Surety bonds (2)
304.7

 
110.6

 
27.8

 
14.7

 
457.8

 
40.6

Bank guarantees
287.0

 
—

 
—

 
79.1

 
366.1

 
81.2

Other letters of credit
—

 
—

 
38.8

 
139.9

 
178.7

 
—

Total
$
2,061.7

 
$
110.6

 
$
66.6

 
$
233.7

 
$
2,472.6

 
$
121.8


(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 $154.0 million in bank guarantees, letters of credit and surety bonds related to collateral for road maintenance, performance guarantees and other operations.
(2) 
A total of $81.0 million of letters of credit issued as collateral to support surety bonds related to Patriot have been excluded from above as they no longer represent off-balance sheet obligations as discussed in Note 19. "Matters Related to the Patriot Bankruptcy".