Certain Balance Sheet Information (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2016

Dec. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Property, Plant And Equipment

Property, plant and equipment of the following at December 31, 2015 and 2014 (in millions):

	CEQP				CMLP
	December 31,				December 31,
	2015		2014		2015		2014
Gathering systems and pipelines	$	1,070.4	$	1,410.9	$	1,213.2	$	1,279.5
Facilities and equipment		1,505.9		1,648.3		1,691.0		1,653.8
Buildings, land, rights-of-way, storage contracts and easements		833.4		841.5		837.1		840.0
Vehicles		46.3		45.2		44.6		43.5
Construction in process		114.5		156.5		114.5		156.5
Base gas		37.3		37.5		37.3		37.5
Salt deposits		120.5		120.5		120.5		120.5
Office furniture and fixtures		19.4		13.5		19.5		13.3
		3,747.7		4,273.9		4,077.7		4,144.6
Less: accumulated depreciation and depletion		436.9		380.1		552.0		398.6
Total property, plant and equipment, net	$	3,310.8	$	3,893.8	$	3,525.7	$	3,746.0

Intangible Assets

Intangible assets consisted of the following at December 31, 2015 and 2014 (in millions):

	CEQP				CMLP
	December 31,				December 31,
	2015		2014		2015		2014
Customer accounts	$	583.7	$	583.7	$	583.7	$	583.7
Covenants not to compete		6.6		9.6		5.6		8.6
Gas gathering, compression and processing contracts		325.2		730.2		325.2		431.4
Acquired storage contracts		29.0		29.0		29.0		29.0
Trademarks		31.3		32.2		15.8		16.7
Deferred financing costs		63.3		57.2		63.3		54.3
		1,039.1		1,441.9		1,022.6		1,123.7
Less: accumulated amortization		229.0		210.6		220.3		154.1
Total intangible assets, net	$	810.1	$	1,231.3	$	802.3	$	969.6

Schedule of Intangible Assets, Future Amortization Expense

Estimated amortization of our intangible assets for the next five years is as follows (in millions):

Year Ending December 31,	CEQP		CMLP
2016	$	82.9	$	79.6
2017		69.8		66.7
2018		57.4		55.9
2019		53.8		53.8
2020		52.6		52.6

Schedule of Accrued Liabilities

Accrued expenses and other liabilities consisted of the following at March 31, 2016 and December 31, 2015 (in millions):

	CEQP				CMLP
	March 31,		December 31,		March 31,		December 31,
	2016		2015		2016		2015
Accrued expenses	$	30.7	$	46.4	$	29.0	$	44.1
Accrued property taxes		5.4		4.8		5.4		4.8
Accrued product purchases payable		1.4		1.5		1.4		1.5
Tax payable		1.3		0.5		0.8		0.5
Interest payable		35.6		26.2		35.6		26.2
Accrued additions to property, plant and equipment		5.3		10.4		5.3		10.4
Capital leases		1.4		1.6		1.4		1.6
Deferred revenue		15.7		14.2		15.7		14.2
Total accrued expenses and other liabilities	$	96.8	$	105.6	$	94.6	$	103.3

Accrued expenses and other liabilities consisted of the following at December 31, 2015 and 2014 (in millions):

	CEQP				CMLP
	December 31,				December 31,
	2015		2014		2015		2014
Accrued expenses	$	46.4	$	52.5	$	44.1	$	50.0
Accrued property taxes		4.8		2.2		4.8		2.2
Accrued product purchases payable		1.5		0.7		1.5		0.7
Tax payable		0.5		1.6		0.5		1.2
Interest payable		26.2		23.5		26.2		21.9
Accrued additions to property, plant and equipment		10.4		20.0		10.4		20.0
Commitments and contingent liabilities (Note 15)		—		40.0		—		40.0
Capital leases		1.6		1.9		1.6		1.9
Deferred revenue		14.2		12.2		14.2		12.2
Total accrued expenses and other liabilities	$	105.6	$	154.6	$	103.3	$	150.1