Financial Instruments and Guarantees with Off-Balance-Sheet Risk (Tables)

9 Months Ended

Sep. 30, 2012

Financial Instruments And Guarantees With Off Balance Sheet Risk Disclosure [Abstract]

Letters of credit, bank guarantees, surety bonds and corporate guarantees

As of September 30, 2012, 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	$	1,221.9	$	—	$	—	$	—	$	1,221.9
Surety bonds	372.1		105.3		11.8		9.8		499.0
Bank guarantees	225.9		—		—		204.7		430.6
Letters of credit	—		—		62.4		81.2		143.6
	$	1,819.9	$	105.3	$	74.2	$	295.7	$	2,295.1

⁽¹⁾  Other includes the $79.7 million in letters of credit described below and an additional $216.0 million in bank guarantees, surety bonds and letters of credit related to collateral for surety companies, road maintenance, performance guarantees and other operations.