Certain Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2016

Balance Sheet Related Disclosures [Abstract]

Property, Plant And Equipment

Property, plant and equipment of the following at December 31, 2016 and 2015 (in millions):

	CEQP				CMLP
	December 31,				December 31,
	2016		2015		2016		2015
Gathering systems and pipelines and related assets	$	639.4	$	1,075.7	$	782.3	$	1,218.5
Facilities and equipment	1,328.3		1,505.9		1,513.4		1,691.0
Buildings, land, rights-of-way, storage rights and easements	315.4		833.4		319.1		837.1
Vehicles	45.7		46.3		44.0		44.6
Construction in process	85.9		114.5		85.9		114.5
Base gas	—		32.0		—		32.0
Salt deposits	120.5		120.5		120.5		120.5
Office furniture and fixtures	20.2		19.4		20.3		19.5
	2,555.4		3,747.7		2,885.5		4,077.7
Less: accumulated depreciation and depletion	457.8		436.9		587.1		552.0
Total property, plant and equipment, net	$	2,097.6	$	3,310.8	$	2,298.4	$	3,525.7

Intangible Assets

Certain intangible assets are amortized on a straight-line basis over their estimated economic lives, as follows:

	Weighted-Average Life (years)
Customer accounts	20
Covenants not to compete	5
Trademarks	6 - 8

Intangible assets consisted of the following at December 31, 2016 and 2015 (in millions):

	CEQP				CMLP
	December 31,				December 31,
	2016		2015		2016		2015
Customer accounts	$	541.9	$	583.7	$	541.9	$	583.7
Covenants not to compete	1.0		6.6		1.0		5.6
Gas gathering, compression and processing contracts	325.2		325.2		325.2		325.2
Acquired storage contracts	—		29.0		—		29.0
Trademarks	30.5		31.3		15.0		15.8
	898.6		975.8		883.1		959.3
Less: accumulated amortization	241.2		206.6		230.2		197.9
Total intangible assets, net	$	657.4	$	769.2	$	652.9	$	761.4

The following table summarizes the total of accumulated amortization of intangible assets by the type of intangible asset at December 31, 2016 and 2015 (in millions):

	CEQP				CMLP
	December 31,				December 31,
	2016		2015		2016		2015
Customer accounts	$	162.4	$	130.1	$	162.4	$	130.1
Covenants not to compete	—		2.5		—		1.7
Gas gathering, compression and processing contracts	63.2		44.3		63.2		44.3
Acquired storage contracts	—		18.5		—		18.5
Trademarks	15.6		11.2		4.6		3.3
Total accumulated amortization	$	241.2	$	206.6	$	230.2	$	197.9

Schedule of Intangible Assets, Future Amortization Expense

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

	CEQP		CMLP
Year Ending December 31,
2017	$	53.7	$	50.6
2018	43.6		42.2
2019	41.9		41.9
2020	41.9		41.9
2021	41.9		41.9

Schedule of Accrued Liabilities

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

	CEQP				CMLP
	December 31,				December 31,
	2016		2015		2016		2015
Accrued expenses	$	46.9	$	46.4	$	45.5	$	44.1
Accrued property taxes	4.2		4.8		4.2		4.8
Accrued natural gas purchases	4.9		1.5		4.9		1.5
Tax payable	1.2		0.5		—		0.5
Interest payable	22.8		26.2		22.8		26.2
Accrued additions to property, plant and equipment	1.7		10.4		1.7		10.4
Capital leases	1.3		1.6		1.3		1.6
Deferred revenue	7.5		14.2		7.5		14.2
Total accrued expenses and other liabilities	$	90.5	$	105.6	$	87.9	$	103.3