Reportable Business Segments (Tables)

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

As of June 30, 2019, reportable segments by Registrant were as follows:

Registrants	Houston Electric T&D	Indiana Electric Integrated	Natural Gas Distribution	Energy  Services	Infrastructure Services	Midstream Investments	Corporate and Other
CenterPoint Energy	X	X	X	X	X	X	X
Houston Electric	X
CERC			X	X			X

Financial data for reportable segments is as follows:

CenterPoint Energy

	Three Months Ended June 30,
	2019									2018
	Revenues from External Customers			Net Intersegment Revenues			Operating Income (Loss)			Revenues from External Customers			Net Intersegment Revenues			Operating Income
	(in millions)
Houston Electric T&D	$	765	(1)	$	—		$	169		$	854	(1)	$	—		$	181
Indiana Electric Integrated	140			—			25			—			—			—
Natural Gas Distribution	650			10			47			487			8			7
Energy Services	838			17			29			841			19			15
Infrastructure Services	325			1			24			—			—			—
Midstream Investments (2)	—			—			—			—			—			—
Corporate and Other	80			—			(7		)	4			—			(16		)
Eliminations	—			(28		)	—			—			(27		)	—
Consolidated	$	2,798		$	—		$	287		$	2,186		$	—		$	187

	Six Months Ended June 30,
	2019									2018
	Revenues from External Customers			Net Intersegment Revenues			Operating Income (Loss)			Revenues from External Customers			Net Intersegment Revenues			Operating Income (Loss)
	(in millions)
Houston Electric T&D	$	1,454	(1)	$	—		$	253		$	1,605	(1)	$	—		$	296
Indiana Electric Integrated	223			—			16			—			—			—
Natural Gas Distribution	2,039			20			214			1,630			18			163
Energy Services	2,020			81			62			2,098			47			(11		)
Infrastructure Services	471			1			8			—			—			—
Midstream Investments (2)	—			—			—			—			—			—
Corporate and Other	122			—			(21		)	8			—			(10		)
Eliminations	—			(102		)	—			—			(65		)	—
Consolidated	$	6,329		$	—		$	532		$	5,341		$	—		$	438

(1) Houston Electric T&D revenues from major external customers are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
	(in millions)
Affiliates of NRG	$	165	$	169	$	316	$	330
Affiliates of Vistra Energy Corp.	59		59		113		113

(2) CenterPoint Energy’s Midstream Investments’ equity earnings, net are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
	(in millions)
Enable	$	74	$	58	$	136	$	127

Houston Electric

Houston Electric consists of a single reportable segment; therefore, a tabular reportable segment presentation has not been

included.

(1) Houston Electric T&D revenues from major external customers are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
	(in millions)
Affiliates of NRG	$	165	$	169	$	316	$	330
Affiliates of Vistra Energy Corp.	59		59		113		113

CERC

	Three Months Ended June 30,
	2019							2018
	Revenues from External Customers		Net Intersegment Revenues			Operating Income (Loss)		Revenues from External Customers		Net Intersegment Revenues			Operating Income (Loss)
	(in millions)
Natural Gas Distribution	$	503	$	10		$	28	$	487	$	8		$	7
Energy Services	839		16			29		841		19			15
Other Operations	—		—			1		—		—			—
Eliminations	—		(26		)	—		—		(27		)	—
Consolidated	$	1,342	$	—		$	58	$	1,328	$	—		$	22

	Six Months Ended June 30,
	2019							2018
	Revenues from External Customers		Net Intersegment Revenues			Operating Income (Loss)		Revenues from External Customers		Net Intersegment Revenues			Operating Income  (Loss)
	(in millions)
Natural Gas Distribution	$	1,688	$	20		$	192	$	1,630	$	18		$	163
Energy Services	2,021		80			62		2,098		47			(11		)
Corporate and Other	1		—			—		—		—			1
Eliminations	—		(100		)	—		—		(65		)	—
Consolidated	$	3,710	$	—		$	254	$	3,728	$	—		$	153

CenterPoint Energy and CERC

	Total Assets
	June 30, 2019							December 31, 2018
	CenterPoint  Energy				CERC			CenterPoint Energy				CERC
	(in millions)
Houston Electric T&D	$	11,478			$	—		$	10,509			$	—
Indiana Electric Integrated (1)	2,989				—			—				—
Natural Gas Distribution (1)	12,946				6,843			6,956				6,956
Energy Services	1,262				1,262			1,558				1,558
Infrastructure Services (1)	1,303				—			—				—
Midstream Investments	2,915				—			2,482				—
Corporate and Other (1)	4,278			(2)	108			6,156			(2)	66
Eliminations	(2,982		)		(398		)	(652		)		(366		)
Consolidated	$	34,189			$	7,815		$	27,009			$	8,214

(1) Total assets by reportable segment include assets acquired in the Merger, which are based on preliminary estimates and allocations and are subject to change. See Note 3.

(2)

Includes pension and other postemployment-related regulatory assets of $639 million and $665 million, respectively, as of June 30, 2019 and December 31, 2018. Additionally, total assets as of December 31, 2018 included $3.9 billion of temporary investments included in Cash and cash equivalents on CenterPoint Energy’s Consolidated Balance Sheets.

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

Houston Electric T&D revenues from major external customers are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
	(in millions)
Affiliates of NRG	$	165	$	169	$	316	$	330
Affiliates of Vistra Energy Corp.	59		59		113		113

Midstream Investments [Table Text Block]

CenterPoint Energy’s Midstream Investments’ equity earnings, net are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
	(in millions)
Enable	$	74	$	58	$	136	$	127