Goodwill and Other Intangibles (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill by reportable business segment as of both March 31, 2018 and December 31, 2017 is as follows:



	(in millions)
Natural Gas Distribution	$	746
Energy Services	110		(1)
Other Operations	11
Total	$	867


(1)	Amount presented is net of the accumulated goodwill impairment charge of $252 million recorded in 2012.

Schedule of Finite-Lived Intangible Assets [Table Text Block]

The tables below present information on CERC’s other intangible assets recorded in Other non-current assets on the Condensed Consolidated Balance Sheets.



		March 31, 2018							December 31, 2017
	Useful Lives	Gross Carrying Amount		Accumulated Amortization			Net Balance		Gross Carrying Amount		Accumulated Amortization			Net Balance
	(in years)	(in millions)
Customer relationships	15	$	86	$	(23	)	$	63	$	86	$	(21	)	$	65
Covenants not to compete	4	4		(2		)	2		4		(2		)	2
Other	Various	15		(9		)	6		15		(8		)	7
Total		$	105	$	(34	)	$	71	$	105	$	(31	)	$	74

Finite-lived Intangible Assets Amortization Expense [Table Text Block]



	Three Months Ended March 31,
	2018		2017
	(in millions)
Amortization expense of intangible assets	$	3	$	2