Condensed Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating Activities
Net income	$ 403.2	$ 1,130.3
Gains on disposition of property, plant and equipment	(27.0)	(13.0)
Adjustments to reconcile net income to net cash and cash equivalents provided by (used for) operating activities:
Stock-based compensation	13.2	10.4
Depreciation and amortization	404.9	450.3
Deferred income taxes	(60.6)	(3.7)
Write-off of equipment and facility included in restructuring charges	17.7	0.0
Qualified pension plan contributions	(1.6)	(0.9)
Qualified pension plan income	(15.0)	(24.7)
Change in:
Receivables	28.4	(25.8)
Income taxes receivable/payable	55.3	75.5
Inventories	(43.4)	(102.9)
Other current assets	9.8	5.8
Accounts payable and accrued liabilities	(222.7)	31.7
Other assets	(27.2)	(17.5)
Other noncurrent liabilities	29.5	(9.1)
Other operating activities	(6.8)	3.3
Net operating activities	557.7	1,509.7
Investing Activities
Capital expenditures	(173.0)	(168.4)
Payments under other long-term supply contracts	(46.2)	0.0
Proceeds from disposition of property, plant and equipment	28.8	14.9
Other investing activities	(3.6)	0.0
Net investing activities	(194.0)	(153.5)
Long-term debt:
Borrowings	587.7	215.0
Repayments	(381.1)	(415.9)
Common stock repurchased and retired	(595.1)	(1,100.6)
Stock options exercised	22.3	21.3
Dividends paid	(76.6)	(89.4)
Contributions received from noncontrolling interests	44.1	0.0
Net financing activities	(398.7)	(1,369.6)
Effect of exchange rate changes on cash and cash equivalents	(0.7)	(3.5)
Net decrease in cash and cash equivalents	(35.7)	(16.9)
Cash and cash equivalents, beginning of year	194.0	180.5
Cash and cash equivalents, end of period	158.3	163.6
Cash paid for interest and income taxes:
Interest, net	148.9	122.1
Income taxes, net of refunds	81.9	213.0
Non-cash investing activities:
Decrease in capital expenditures included in accounts payable and accrued liabilities	$ 17.9	$ 12.0