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Consolidated Statements of Cash Flows - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Cash Flows from Operating Activities: |  |  |
Net income | $ 765.2 | $ 1,029.8 | $ 841.1
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation, depletion, and amortization of intangibles | 517.7 | 456.8 | 417.5
Amortization of deferred financing costs | 2.2 | 2.1 | 4.4
Loss on early extinguishment of debt | 0.0 | 0.0 | 56.1
Share-based compensation expense | 40.0 | 35.6 | 35.5
Deferred income tax provision | 5.2 | 86.0 | 59.4
Net loss on asset disposals | 9.1 | 15.2 | 6.1
Pension and post-retirement benefits expense, net of contributions | (30.8) | (47.4) | (50.5)
Other, net | 13.3 | 2.0 | 11.9
(Increase) decrease in assets - |  |  |
Accounts receivable | (1.4) | 39.3 | (227.2)
Inventories | (35.8) | (75.2) | (105.5)
Prepaid expenses and other current assets | (4.2) | (11.0) | (2.7)
Increase (decrease) in liabilities — |  |  |
Accounts payable | 11.4 | (18.1) | 12.2
Accrued liabilities | (8.2) | 8.3 | 37.9
Federal and state income tax payable / receivable | 31.4 | (28.4) | (2.1)
Net cash provided by operating activities | 1,315.1 | 1,495.0 | 1,094.1
Cash Flows from Investing Activities: |  |  |
Additions to property, plant, and equipment | (469.7) | (824.2) | (605.1)
Acquisitions of businesses, net of cash acquired | 0.0 | 0.0 | (194.9)
Additions to other long-term assets | (2.6) | (6.2) | (1.8)
Proceeds from asset disposals | 1.6 | 2.2 | 7.9
Purchases of held-to-maturity debt securities | (400.0) | 0.0 | 0.0
Purchases of marketable debt securities | (107.2) | (126.1) | (127.4)
Proceeds from sales of available-for-sale debt securities | 5.5 | 31.1 | 26.7
Proceeds from maturities of available-for-sale debt securities | 97.3 | 87.6 | 100.2
Other, net | 0.0 | 1.9 | 0.0
Net cash used for investing activities | (875.1) | (833.7) | (794.4)
Cash Flows from Financing Activities: |  |  |
Repayments of debt and finance lease obligations | (1.9) | (1.7) | (757.7)
Net proceeds received from issuance of debt | 397.1 | 0.0 | 690.2
Financing costs paid | (1.1) | 0.0 | (2.4)
Common stock dividends paid | (448.9) | (420.3) | (379.8)
Repurchases of common stock | (41.5) | (522.6) | (193.0)
Shares withheld to cover employee restricted stock taxes | (15.7) | (15.4) | (12.9)
Net cash used for financing activities | (112.0) | (960.0) | (655.6)
Net increase (decrease) in cash and cash equivalents | 328.0 | (298.7) | (355.9)
Cash and cash equivalents, beginning of year | 320.0 | 618.7 | 974.6
Cash and cash equivalents, end of year | $ 648.0 | $ 320.0 | $ 618.7

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