Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating activities
Net income	$ 205.6	$ 18.6
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion	242.7	242.3
Amortization of debt-related deferred costs and fair value adjustment	2.5	1.7
Unit-based compensation	25.7	26.8
Loss on long-lived assets, net	4.8	186.9
Gain on acquisition	0.0	(75.3)
Earnings from unconsolidated affiliates, net, adjusted for cash distributions received	(133.3)	(0.9)
Deferred income taxes	(0.1)	1.1
Other	0.1	0.0
Changes in operating assets and liabilities	30.5	(123.9)
Net cash provided by operating activities	378.5	277.3
Investing activities
Acquisitions, net of cash acquired (Note 3)	0.0	(604.3)
Purchases of property, plant and equipment	(164.0)	(147.3)
Investments in unconsolidated affiliates	(7.2)	(90.2)
Capital distributions from unconsolidated affiliates	4.4	9.4
Net proceeds from sale of assets, including equity investments	188.2	315.2
Net cash provided by (used in) investing activities	21.4	(517.2)
Financing activities
Proceeds from the issuance of long-term debt	2,058.3	3,072.0
Payments on long-term debt	(2,127.4)	(2,393.1)
Payments on finance leases	(2.0)	(31.3)
Payments for deferred financing costs	(9.2)	(1.8)
Purchase of common units	0.0	(123.7)
Distributions to partners	(206.7)	(196.7)
Distributions to non-controlling partner	(31.0)	(31.0)
Distributions to preferred unitholders	(45.1)	(45.0)
Taxes paid for unit-based compensation vesting	(20.5)	(15.8)
Other	0.0	(0.6)
Net cash provided by (used in) financing activities	(383.6)	233.0
Net change in cash	16.3	(6.9)
Cash at beginning of period	7.5	13.3
Cash at end of period	23.8	6.4
Supplemental schedule of noncash investing activities
Net change to property, plant and equipment through accounts payable and accrued expenses	(18.4)	19.9
Crestwood Midstream Partners LP
Operating activities
Net income	217.8	(107.4)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion	242.5	248.0
Amortization of debt-related deferred costs and fair value adjustment	2.5	1.7
Unit-based compensation	25.7	26.8
Loss on long-lived assets, net	4.8	311.9
Gain on acquisition	0.0	(75.3)
Earnings from unconsolidated affiliates, net, adjusted for cash distributions received	(133.3)	(0.9)
Deferred income taxes	0.2	1.2
Other	0.1	0.0
Changes in operating assets and liabilities	31.2	(123.9)
Net cash provided by operating activities	391.5	282.1
Investing activities
Acquisitions, net of cash acquired (Note 3)	0.0	(602.7)
Purchases of property, plant and equipment	(164.0)	(146.6)
Investments in unconsolidated affiliates	(7.2)	(90.2)
Capital distributions from unconsolidated affiliates	4.4	9.4
Net proceeds from sale of assets, including equity investments	188.2	315.2
Net cash provided by (used in) investing activities	21.4	(514.9)
Financing activities
Proceeds from the issuance of long-term debt	2,058.3	3,072.0
Payments on long-term debt	(2,127.4)	(2,393.1)
Payments on finance leases	(2.0)	(31.3)
Payments for deferred financing costs	(9.2)	(1.8)
Contributions from partner	0.0	164.3
Distributions to partners	(264.8)	(537.6)
Distributions to non-controlling partner	(31.0)	(31.0)
Taxes paid for unit-based compensation vesting	(20.5)	(15.8)
Net cash provided by (used in) financing activities	(396.6)	225.7
Net change in cash	16.3	(7.1)
Cash at beginning of period	7.1	12.9
Cash at end of period	23.4	5.8
Supplemental schedule of noncash investing activities
Net change to property, plant and equipment through accounts payable and accrued expenses	$ (18.4)	$ 19.9