Accounts Payable and Accrued Liabilities (Tables)

3 Months Ended

Mar. 31, 2013

Accounts Payable and Accrued Liabilities [Abstract]

Schedule of accounts payable and accrued liabilities

The components of accounts payable and accrued liabilities consisted of the following:

	March 31, 2013		December 31, 2012
Commodities	$	383.5	$	416.8
Other goods and services		141.0		154.4
Interest		35.3		39.5
Compensation and benefits		30.4		40.7
Other		30.9		27.6
	$	621.1	$	679.0