Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating activities
Net income (loss)	$ (23.4)	$ 14.1
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and accretion	56.1	39.8
Amortization of debt-related deferred costs	1.6	1.4
Unit-based compensation charges	(4.4)	17.3
Loss on long-lived assets, net	1.0	2.0
Goodwill, Impairment Loss	80.3	0.0
Earnings from unconsolidated affiliates, net, adjusted for cash distributions received	4.5	3.3
Deferred income taxes	(0.2)	0.2
Changes in operating assets and liabilities	3.7	52.8
Net cash provided by operating activities	119.2	130.9
Investing activities
Purchases of property, plant and equipment	(86.8)	(68.5)
Investment in unconsolidated affiliates	(6.0)	(38.2)
Capital distributions from unconsolidated affiliates	9.5	16.7
Payments for (Proceeds from) Other Investing Activities	0.0	(1.0)
Net cash used in investing activities	(83.3)	(91.0)
Financing activities
Proceeds from the issuance of long-term debt	275.9	298.9
Payments on long-term debt	(246.9)	(284.4)
Payments on finance leases	(0.8)
Payments on capital leases		(1.1)
Payments for deferred financing costs	0.0	(0.2)
Distributions to partners	(45.3)	(43.1)
Distributions to non-controlling partner	(9.2)	(3.3)
Distributions to preferred unitholders	(15.0)	(15.0)
Taxes paid for unit-based compensation vesting	(15.1)	(7.0)
Other	0.0	(0.1)
Net cash provided by (used in) financing activities	(56.4)	(55.3)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(20.5)	(15.4)
Cash at beginning of period	25.7	17.2
Cash at end of period	5.2	1.8
Supplemental schedule of noncash investing activities
Net change to property, plant and equipment through accounts payable and accrued expenses	21.3	5.7
Crestwood Midstream Partners LP
Operating activities
Net income (loss)	(25.6)	11.6
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and accretion	59.6	43.4
Amortization of debt-related deferred costs	1.6	1.4
Unit-based compensation charges	(4.4)	17.3
Loss on long-lived assets, net	1.0	2.0
Goodwill, Impairment Loss	80.3	0.0
Earnings from unconsolidated affiliates, net, adjusted for cash distributions received	4.5	3.3
Changes in operating assets and liabilities	(1.2)	51.9
Net cash provided by operating activities	115.8	130.9
Investing activities
Purchases of property, plant and equipment	(86.8)	(68.5)
Investment in unconsolidated affiliates	(6.0)	(38.2)
Capital distributions from unconsolidated affiliates	9.5	16.7
Payments for (Proceeds from) Other Investing Activities	0.0	(1.0)
Net cash used in investing activities	(83.3)	(91.0)
Financing activities
Proceeds from the issuance of long-term debt	275.9	298.9
Payments on long-term debt	(246.9)	(284.4)
Payments on finance leases	(0.8)
Payments on capital leases		(1.1)
Payments for deferred financing costs	0.0	(0.2)
Distributions to partners	(57.0)	(57.8)
Distributions to non-controlling partner	(9.2)	(3.3)
Taxes paid for unit-based compensation vesting	(15.1)	(7.0)
Net cash provided by (used in) financing activities	(53.1)	(54.9)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(20.6)	(15.0)
Cash at beginning of period	25.4	16.5
Cash at end of period	4.8	1.5
Supplemental schedule of noncash investing activities
Net change to property, plant and equipment through accounts payable and accrued expenses	$ 21.3	$ 5.7