CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net income (loss)	$ (24.7)	$ 38.9
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Amortization in interest expense	2.6	2.7
Compensation on equity grants	16.5	13.2
Depreciation and amortization expense	237.4	198.1
Accretion of asset retirement obligations	1.0	0.9
Increase (decrease) in redemption value of mandatorily redeemable preferred interests		(72.5)
Deferred income tax expense (benefit)	(2.9)	8.9
Equity (earnings) loss of unconsolidated affiliates	(2.8)	(1.5)
Distributions of earnings received from unconsolidated affiliates	4.8	4.2
Risk management activities	7.2	10.9
(Gain) loss on sale or disposition of assets	3.2	(0.1)
(Gain) loss from financing activities	1.4
Change in contingent considerations	9.7	56.1
Changes in operating assets and liabilities, net of business acquisitions:
Receivables and other assets	78.2	123.7
Inventories	(60.6)	110.2
Accounts payable and other liabilities	36.6	(139.3)
Net cash provided by operating activities	307.6	354.4
Cash flows from investing activities
Outlays for property, plant and equipment	(943.3)	(595.9)
Proceeds from sale of assets	0.5
Investments in unconsolidated affiliates	(117.4)	(88.0)
Return of capital from unconsolidated affiliates		1.5
Other, net	(9.0)	5.1
Net cash used in investing activities	(1,069.2)	(677.3)
Debt obligations:
Proceeds from borrowings under credit facilities	765.0	640.0
Repayments of credit facilities	(795.0)	(280.0)
Proceeds from borrowings under accounts receivable securitization facility	378.0
Repayments of accounts receivable securitization facility	(350.4)	(50.0)
Proceeds from issuance of senior notes	1,500.0
Redemption of senior notes	(749.4)
Principal payments of finance leases	(2.7)
Proceeds from issuance of common stock		58.1
Costs incurred in connection with financing arrangements	(12.8)	(0.4)
Repurchase of shares and units under compensation plans	(9.6)	(0.4)
Contributions from noncontrolling interests	196.8	280.1
Distributions to noncontrolling interests	(18.6)	(16.5)
Distributions to Partnership unitholders	(2.8)	(2.8)
Dividends paid to common and Series A preferred shareholders	(244.1)	(222.6)
Net cash provided by financing activities	654.4	405.5
Net change in cash and cash equivalents	(107.2)	82.6
Cash and cash equivalents, beginning of period	232.1	137.2
Cash and cash equivalents, end of period	$ 124.9	$ 219.8