Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 793.5	$ 787.5
Accounts receivable, net	720.2	527.9
Inventories, net of inventory valuation reserves	1,034.6	727.7
Other current assets	358.2	256.4
Total current assets	2,906.5	2,299.5
Property, plant and equipment:
Property, plant and equipment	3,580.7	3,519.5
Less: accumulated depreciation	(1,212.9)	(1,152.3)
Property, plant and equipment, net	2,367.8	2,367.2
Operating lease right-of-use assets	174.1	182.0
Goodwill	729.7	729.7
Other intangibles, net	106.9	107.8
Equity method investments	360.2	363.6
Other non-current assets	98.8	84.3
Total assets	6,744.0	6,134.1
Current liabilities:
Accounts payable	1,353.6	1,144.0
Current portion of long-term debt	13.4	33.4
Obligation under Supply and Offtake Agreements	125.0	129.2
Current portion of operating lease liabilities	47.5	50.2
Accrued expenses and other current liabilities	961.8	546.4
Total current liabilities	2,501.3	1,903.2
Non-current liabilities:
Long-term debt, net of current portion	2,354.4	2,315.0
Obligation Under Supply And Offtake Agreements, Noncurrent	287.1	224.9
Environmental liabilities, net of current portion	107.0	107.4
Asset retirement obligations	37.8	37.5
Deferred tax liabilities	258.5	255.5
Operating lease liabilities, net of current portion	125.9	131.8
Other non-current liabilities	43.1	33.7
Total non-current liabilities	3,213.8	3,105.8
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, 91,450,724 shares and 91,356,868 shares issued at March 31, 2021 and December 31, 2020, respectively	0.9	0.9
Additional paid-in capital	1,188.6	1,185.1
Accumulated other comprehensive loss	$ (7.4)	$ (7.2)
Treasury stock, shares (in shares)	17,575,527	17,575,527
Treasury stock, 17,575,527 shares, at cost, as of March 31, 2021 and December 31, 2020, respectively	$ (694.1)	$ (694.1)
Retained earnings	423.2	522.0
Non-controlling interests in subsidiaries	117.7	118.4
Total stockholders’ equity	1,028.9	1,125.1
Total liabilities and stockholders’ equity	$ 6,744.0	$ 6,134.1