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

3 Months Ended

Mar. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

	Goodwill at December 31, 2015		Goodwill Impairments during the  Three Months Ended		Goodwill at March 31, 2016
			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