OTHER FINANCIAL STATEMENT DATA

The following provides additional information concerning selected balance sheet accounts:



	December 31,
(in millions)	2014		2013
Receivables
Trade	$	624.9	$	460.1
Non-trade	132.1		84.9
	757.0		545.0
Less allowance for doubtful accounts	2.6		1.9
	$	754.4	$	543.1
Inventories
Raw materials	$	114.6	$	34.0
Work in process	505.1		433.6
Finished goods	1,025.5		891.6
Operating materials and supplies	73.1		73.7
	$	1,718.3	$	1,432.9
Other current assets
Final price deferred^(a)	$	49.9	$	154.3
Income and other taxes receivable	201.9		272.6
Prepaid expenses	63.8		115.8
Assets held for sale^(b)	6.0		111.9
Other	46.6		52.2
	$	368.2	$	706.8



	December 31,
(in millions)	2014		2013
Accrued liabilities
Non-income taxes	$	29.9	$	23.6
Payroll and employee benefits	172.8		111.8
Asset retirement obligations	87.9		86.3
Customer prepayments	101.6		131.9
Other	333.9		312.7
	$	726.1	$	666.3
Other noncurrent liabilities
Asset retirement obligations	$	771.6	$	637.6
Accrued pension and postretirement benefits	77.6		69.0
Unrecognized tax benefits	89.2		96.3
Other	261.6		124.2
	$	1,200.0	$	927.1

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(a)	Final price deferred is product that has shipped to customers, but the price has not yet been agreed upon. This has not been included in inventory as it is not held for sale.


(b)	See further description of assets held for sale in Footnote 22.

Interest expense, net was comprised of the following in the calendar year 2014, seven months ended December 31, 2013, and fiscal 2013 and 2012: