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Supplementary Cash Flow Information
 3 Months Ended
Mar. 31, 2013
Supplemental Cash Flow Elements [Abstract]  
Supplementary Cash Flow Information
Supplementary Cash Flow Information
 (in millions)
For the Three Months Ended March 31,
 
2013
 
2012
Change in working capital accounts:
 
 
 
Accounts receivable
$
(5.9
)
 
$
20.2

Product inventory
0.6

 
(17.4
)
Material and supplies inventory
(2.6
)
 
1.4

Prepaid expenses and other current assets
(7.8
)
 
(2.2
)
Income and mining taxes receivable
4.6

 
0.7

Accounts payable and accrued liabilities
(7.1
)
 
(17.8
)
Income and mining taxes payable
—

 
1.2

 
$
(18.2
)
 
$
(13.9
)
Cash interest paid
$
7.9

 
$
0.2

Income and mining taxes (refund) paid, net
$
(1.1
)
 
$
2.2


For the three months ended March 31, 2013, the cash interest paid of $7.9 million was all capitalized interest payments related to the Company's debt, as described in Note 8. For the three months ended March 31, 2012, TCM had no capitalized interest payments; cash interest paid was related to equipment financing loans.
Non-cash Investing and Financing Activities
(in millions)
For the Three Months Ended March 31,
 
2013
 
2012
Investing activities
 
 
 
Increase in capital expenditure accrual
$
—

 
$
20.3

Capitalized interest
$
23.7

 
$
6.6