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

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