Basis of Presentation and Summary of Significant Accounting Policies (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2016

Dec. 31, 2015

Accounting Policies [Abstract]

Estimated Useful Lives Of Property, Plant And Equipment

Depreciation is computed by the straight-line method over the estimated useful lives of the assets, as follows:

	Years
Gathering systems and pipelines		20
Facilities and equipment		20 – 25
Buildings, rights-of-way and easements		20 – 40
Office furniture and fixtures		5 – 10
Vehicles		5

Intangible Assets, Useful life

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

	Weighted-Average Life (years)
Customer accounts		22
Covenants not to compete		5
Trademarks		6

Schedule of Goodwill

The following table summarizes the goodwill of our various reporting units (in millions):

	Goodwill at December 31, 2015		Goodwill Impairments during the Three Months Ended March 31, 2016		Goodwill at March 31, 2016
Gathering and Processing Marcellus	$	8.6	$	8.6	$	—
Arrow		45.9		—		45.9
Storage and Transportation
Northeast Storage and Transportation		726.3		—		726.3
COLT		44.9		13.7		31.2
Marketing, Supply and Logistics
Supply and Logistics		167.2		65.5		101.7
Storage and Terminals		50.5		14.1		36.4
US Salt		12.6		—		12.6
Trucking		29.5		7.8		21.7
Total	$	1,085.5	$	109.7	$	975.8

The following table summarizes the goodwill of our various reporting units (in millions):

	Goodwill at December 31, 2013		Final Purchase Price Allocation Adjustments			Goodwill Impairments during the Year Ended December 31, 2014		Goodwill at December 31, 2014		Goodwill Impairments during the Year Ended December 31, 2015(1)		Goodwill at December 31, 2015
Gathering and Processing
Fayetteville	$	76.8	$	—		$	4.3	$	72.5	$	72.5	$	—
Granite Wash		14.2		—			14.2		—		—		—
Marcellus		8.6		—			—		8.6		—		8.6
Arrow		45.5		0.4			—		45.9		—		45.9
Storage and Transportation
Northeast Storage and Transportation		727.1		(0.8	)		—		726.3		—		726.3
COLT		670.5		(2.2	)		—		668.3		623.4		44.9
Marketing, Supply and Logistics
West Coast		89.1		(3.2	)		—		85.9		85.9		—
Supply and Logistics		269.5		(3.3	)		—		266.2		99.0		167.2
Storage and Terminals		104.7		(0.5	)		—		104.2		53.7		50.5
US Salt		16.1		(1.3	)		2.2		12.6		—		12.6
Trucking		178.4		(0.5	)		—		177.9		148.4		29.5
Watkins Glen		94.6		(0.3	)		28.1		66.2		66.2		—
Total Crestwood Midstream	$	2,295.1	$	(11.7	)	$	48.8	$	2,234.6	$	1,149.1	$	1,085.5
Barnett (Gathering and Processing)		257.2		—			—		257.2		257.2		—
Total Crestwood Equity	$	2,552.3	$	(11.7	)	$	48.8	$	2,491.8	$	1,406.3	$	1,085.5

(1) Included in these amounts are approximately $515.4 million and $470.6 million of goodwill impairments recorded at Crestwood Equity and Crestwood Midstream, respectively, during the three months ended December 31, 2015, which primarily resulted from the finalization of the preliminary goodwill impairments recorded on these reporting units during the three months ended September 30, 2015.