Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 613.6	$ 648.0
Short-term marketable debt securities ($90.8 million and $93.5 million measured at fair value as of June 30, 2024 and December 31, 2023, respectively)	490.8	493.5
Accounts receivable, net of allowance for credit losses and customer deductions of $0.0 million and $13.1 million as of June 30, 2024 and December 31, 2023, respectively	1,145.2	1,033.2
Inventories	1,029.5	1,013.1
Prepaid expenses and other current assets	204.5	62.3
Federal and state income taxes receivable	0.3	4.3
Total current assets	3,483.9	3,254.4
Property, plant, and equipment, net	3,961.5	3,863.8
Goodwill	922.4	922.4
Other intangible assets, net	210.7	229.6
Operating lease right-of-use assets	266.8	279.6
Long-term marketable debt securities	68.4	64.1
Other long-term assets	68.4	67.2
Total assets	8,982.1	8,681.1
Current liabilities:
Current maturities of long-term debt	399.9	399.6
Operating lease obligations	80.3	78.6
Finance lease obligations	2.1	2.0
Accounts payable	474.5	402.4
Dividends payable	115.4	115.9
Accrued liabilities	345.6	253.5
Accrued interest	13.7	13.7
Total current liabilities	1,431.5	1,265.7
Long-term liabilities:
Long-term debt	2,473.2	2,472.2
Operating lease obligations	197.1	212.1
Finance lease obligations	7.7	8.7
Deferred income taxes	552.1	558.0
Compensation and benefits	114.9	106.4
Other long-term liabilities	79.0	60.7
Total long-term liabilities	3,424.0	3,418.1
Commitments and contingent liabilities
Stockholders' equity:
Common stock, par value $0.01 per share, 300.0 million shares authorized, 89.8 million and 89.6 million shares issued as of June 30, 2024 and December 31, 2023, respectively	0.9	0.9
Additional paid in capital	650.3	620.1
Retained earnings	3,544.4	3,447.2
Accumulated other comprehensive loss	(69.0)	(70.9)
Total stockholders' equity	4,126.6	3,997.3
Total liabilities and stockholders' equity	$ 8,982.1	$ 8,681.1