CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities
Net income (loss)	$ 279.8	$ 332.6
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Amortization in interest expense	3.9	3.7
Compensation on equity grants	17.6	14.6
Depreciation and amortization expense	367.6	340.5
Deferred income tax expense (benefit)	56.9	79.8
Equity (earnings) loss of unconsolidated affiliates	(5.5)	(2.8)
Distributions of earnings received from unconsolidated affiliates	2.4	5.6
Risk management activities	248.8	22.0
Other, net	3.9	1.5
Changes in operating assets and liabilities, net of acquisitions:
Receivables and other assets	217.1	39.8
Inventories	78.8	147.0
Accounts payable, accrued liabilities and other liabilities	(169.3)	(64.5)
Interest payable	(147.6)	(43.4)
Net cash provided by (used in) operating activities	954.4	876.4
Cash flows from investing activities
Outlays for property, plant and equipment	(792.2)	(669.8)
Investments in unconsolidated affiliates	(23.8)	(9.4)
Return of capital from unconsolidated affiliates	2.5	0.7
Other, net	0.2	0.6
Net cash provided by (used in) investing activities	(813.3)	(677.9)
Debt obligations:
Proceeds from borrowings of commercial paper notes	25,432.0	14,025.0
Repayments of commercial paper notes	(25,642.5)	(13,840.0)
Proceeds from borrowings under accounts receivable securitization facility	870.0	25.0
Repayments of accounts receivable securitization facility	(600.0)	(100.0)
Proceeds from issuance of senior unsecured notes	1,993.9
Principal payments of finance leases	(14.6)	(10.8)
Costs incurred in connection with financing arrangements	(29.3)
Repurchases of common stock	(124.9)	(123.7)
Shares tendered for tax withholding obligations	(46.5)	(36.5)
Contributions from noncontrolling interests		1.8
Distributions to noncontrolling interests	(17.9)	(53.2)
Repurchase of noncontrolling interests	(1,800.0)	(1.3)
Dividends paid to common shareholders	(167.2)	(116.6)
Net cash provided by (used in) financing activities	(147.0)	(230.3)
Net change in cash and cash equivalents	(5.9)	(31.8)
Cash and cash equivalents, beginning of period	157.3	141.7
Cash and cash equivalents, end of period	$ 151.4	$ 109.9