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Unaudited Consolidated Statements of Cash Flows - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Cash provided by operating activities:    
Net income $ 453.7 $ 383.9
Adjustments to reconcile net income to cash provided by operating activities:    
Depreciation, amortization, depletion and accretion 425.8 382.8
Non-cash interest expense 22.0 24.7
Stock-based compensation 11.2 11.6
Deferred tax provision 47.5 14.5
Provision for doubtful accounts, net of adjustments 7.3 7.8
Loss on extinguishment of debt 0.0 0.2
Gain on disposition of assets and asset impairments, net (0.1) (3.8)
Loss (gain) from unconsolidated equity method investments 8.7 (1.0)
Other non-cash items (0.1) (1.6)
Change in assets and liabilities, net of effects from business acquisitions and divestitures:    
Accounts receivable (1.1) (3.3)
Prepaid expenses and other assets 18.1 87.2
Accounts payable (1.2) (71.1)
Capping, closure and post-closure expenditures (8.9) (8.8)
Remediation expenditures (9.8) (11.6)
Other liabilities (161.6) (126.2)
Proceeds for retirement of certain hedging relationships 0.0 2.4
Cash provided by operating activities 811.5 687.7 CloseClose
Cash used in investing activities:    
Purchases of property and equipment (514.5) (378.6)
Proceeds from sales of property and equipment 2.4 6.0
Cash used in acquisitions and investments, net of cash and restricted cash acquired (166.3) (290.9)
Cash paid for business divestitures 0.0 (0.7)
Purchases of restricted marketable securities (12.0) (4.5)
Sales of restricted marketable securities 11.5 4.4
Other 0.0 11.0
Cash used in investing activities (678.9) (653.3) CloseClose
Cash used in financing activities:    
Proceeds from credit facilities and notes payable, net of fees 6,436.8 6,675.5
Proceeds from issuance of senior notes, net of discount and fees 0.0 1,183.6
Payments of credit facilities and notes payable (6,440.8) (7,729.5)
Issuances of common stock, net (25.3) (11.0)
Cash dividends paid (168.3) (156.4)
Distributions paid to non-controlling interests in consolidated subsidiary (0.3) 0.0
Contingent consideration payments (3.3) (4.2)
Cash used in financing activities (201.2) (42.0) CloseClose
Effect of foreign exchange rate changes on cash (0.5) 0.0 CloseClose
Increase in cash, cash equivalents, restricted cash and restricted cash equivalents (69.1) (7.6)
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of period 227.5 214.3
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period $ 158.4 $ 206.7