Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2018		Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 1,132.8		$ 931.8
Accounts receivable, net	785.1		579.6
Accounts receivable from related parties	17.0		2.1
Inventories, net of inventory valuation reserves	881.5		808.4
Assets held for sale	25.2		160.0
Other current assets	107.7		129.9
Total current assets	2,949.3		2,611.8
Property, plant and equipment:
Property, plant and equipment	2,812.4		2,772.5
Less: accumulated depreciation	(708.8)		(631.7)
Property, plant and equipment, net	2,103.6		2,140.8
Goodwill	857.8		816.6
Other intangibles, net	106.1		101.1
Equity method investments	130.5		138.1
Other non-current assets	64.5		126.8
Total assets	6,211.8	[1]	5,935.2
Current liabilities:
Accounts payable	1,050.6		973.4
Accounts payable to related parties	1.8		1.7
Current portion of long-term debt	180.8		590.2
Obligation under Supply and Offtake Agreements	471.2		435.6
Liabilities associated with assets held for sale	12.0		105.9
Accrued expenses and other current liabilities	445.0		564.9
Total current liabilities	2,161.4		2,671.7
Non-current liabilities:
Long-term debt, net of current portion	1,861.7		875.4
Environmental liabilities, net of current portion	135.7		68.9
Asset retirement obligations	71.8		72.1
Deferred tax liabilities	127.2		199.9
Other non-current liabilities	74.7		83.0
Total non-current liabilities	2,271.1		1,299.3
Stockholders’ equity:
Preferred stock, $0.01 par value, 10,000,000 shares authorized, no shares issued and outstanding	0.0		0.0
Common stock, $0.01 par value, 110,000,000 shares authorized, 87,631,115 shares and 81,533,548 shares issued at June 30, 2018 and December 31, 2017, respectively	0.9		0.8
Additional paid-in capital	1,041.8		900.1
Accumulated other comprehensive (loss) income	(42.4)		6.9
Treasury stock, 3,703,826 shares and 762,623 shares, at cost, as of June 30, 2018 and December 31, 2017, respectively	(140.3)		(25.0)
Retained earnings	742.8		767.8
Non-controlling interests in subsidiaries	176.5		313.6
Total stockholders’ equity	1,779.3		1,964.2
Total liabilities and stockholders’ equity	$ 6,211.8		$ 5,935.2

[1] Assets held for sale of $25.2 million are included in the corporate, other and eliminations segment as of June 30, 2018.