Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 628.6	$ 618.7
Short-term marketable debt securities	81.3	86.1
Accounts receivable, net of allowance for credit losses and customer deductions of $20.0 million and $14.3 million as of March 31, 2022 and December 31, 2021, respectively	1,140.7	1,071.0
Inventories	941.2	902.5
Prepaid expenses and other current assets	77.6	47.0
Federal and state income taxes receivable		7.4
Total current assets	2,869.4	2,732.7
Property, plant, and equipment, net	3,670.7	3,529.0
Goodwill	923.1	923.5
Other intangible assets, net	298.2	308.4
Operating lease right-of-use assets	264.4	238.3
Long-term marketable debt securities	68.5	60.0
Other long-term assets	43.5	44.9
Total assets	8,137.8	7,836.8
Current liabilities:
Operating lease obligations	69.7	67.1
Finance lease obligations	1.8	1.7
Accounts payable	546.7	452.4
Dividends payable	96.9	96.3
Accrued liabilities	188.6	255.0
Accrued interest	26.0	12.3
Federal and state income taxes payable	38.2
Total current liabilities	967.9	884.8
Long-term liabilities:
Long-term debt	2,472.0	2,471.5
Operating lease obligations	202.6	179.3
Finance lease obligations	12.2	12.7
Deferred income taxes	488.8	465.9
Compensation and benefits	157.0	157.4
Other long-term liabilities	58.0	58.0
Total long-term liabilities	3,390.6	3,344.8
Commitments and contingent liabilities
Stockholders' equity:
Common stock, par value $0.01 per share, 300.0 million shares authorized, 95.0 million and 93.5 million shares issued as of March 31, 2022 and December 31, 2021, respectively	0.9	0.9
Additional paid in capital	591.7	579.4
Retained earnings	3,261.9	3,102.1
Accumulated other comprehensive loss	(75.2)	(75.2)
Total stockholders' equity	3,779.3	3,607.2
Total liabilities and stockholders' equity	$ 8,137.8	$ 7,836.8