Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 807.9	$ 955.3
Accounts receivable, net	518.7	792.6
Inventories, net of inventory valuation reserves	672.0	946.7
Other current assets	515.9	268.7
Total current assets	2,514.5	2,963.3
Property, plant and equipment:
Property, plant and equipment	3,515.7	3,362.8
Less: accumulated depreciation	(1,091.8)	(934.5)
Property, plant and equipment, net	2,423.9	2,428.3
Operating lease right-of-use assets	180.3	183.6
Goodwill	855.7	855.7
Other intangibles, net	109.0	110.3
Equity method investments	373.1	407.3
Other non-current assets	68.5	67.8
Total assets	6,525.0	7,016.3
Current liabilities:
Accounts payable	973.1	1,599.7
Current portion of long-term debt	33.4	36.4
Obligation under Supply and Offtake Agreements	102.8	332.5
Current portion of operating lease liabilities	47.8	40.5
Accrued expenses and other current liabilities	657.1	346.8
Total current liabilities	1,814.2	2,355.9
Non-current liabilities:
Long-term debt, net of current portion	2,440.6	2,030.7
Obligation Under Supply And Offtake Agreements, Noncurrent	220.4	144.8
Environmental liabilities, net of current portion	106.1	137.9
Asset retirement obligations	37.2	68.6
Deferred tax liabilities	316.2	267.9
Operating lease liabilities, net of current portion	132.6	144.3
Other non-current liabilities	37.4	30.9
Total non-current liabilities	3,290.5	2,825.1
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, 91,301,229 shares and 90,987,025 shares issued at September 30, 2020 and December 31, 2019, respectively	0.9	0.9
Additional paid-in capital	1,180.1	1,151.9
Accumulated other comprehensive income	0.0	0.1
Treasury stock, 17,575,527 shares and 17,516,814 shares, at cost, as of September 30, 2020 and December 31, 2019, respectively	(694.1)	(692.2)
Retained earnings	815.3	1,205.6
Non-controlling interests in subsidiaries	118.1	169.0
Total stockholders’ equity	1,420.3	1,835.3
Total liabilities and stockholders’ equity	$ 6,525.0	$ 7,016.3