Reportable Business Segments (Tables)

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

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

Financial data for reportable segments is as follows:

CenterPoint Energy

	Three Months Ended September 30,
	2019								2018
	Revenues from External Customers			Net Intersegment Revenues			Operating Income		Revenues from External Customers			Net Intersegment Revenues			Operating Income
	(in millions)
Houston Electric T&D	$	859	(1)	$	—		$	269	$	897	(1)	$	—		$	227
Indiana Electric Integrated	165			—			48		—			—			—
Natural Gas Distribution	515			9			27		402			8			3
Energy Services	734			11			2		910			10			(9		)
Infrastructure Services	376			1			42		—			—			—
Midstream Investments (2)	—			—			—		—			—			—
Corporate and Other	93			—			4		3			—			5
Eliminations	—			(21		)	—		—			(18		)	—
Consolidated	$	2,742		$	—		$	392	$	2,212		$	—		$	226

	Nine Months Ended September 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	$	2,313	(1)	$	—		$	522		$	2,502	(1)	$	—		$	523
Indiana Electric Integrated	388			—			64			—			—			—
Natural Gas Distribution	2,554			29			241			2,032			26			166
Energy Services	2,754			92			64			3,008			57			(20		)
Infrastructure Services	847			2			50			—			—			—
Midstream Investments (2)	—			—			—			—			—			—
Corporate and Other	215			—			(17		)	11			—			(5		)
Eliminations	—			(123		)	—			—			(83		)	—
Consolidated	$	9,071		$	—		$	924		$	7,553		$	—		$	664

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
	(in millions)
Affiliates of NRG	$	231	$	213	$	547	$	543
Affiliates of Vistra Energy Corp.	83		79		196		192

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
	(in millions)
Enable	$	77	$	81	$	213	$	208

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 September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
	(in millions)
Affiliates of NRG	$	231	$	213	$	547	$	543
Affiliates of Vistra Energy Corp.	83		79		196		192

CERC

	Three Months Ended September 30,
	2019							2018
	Revenues from External Customers		Net Intersegment Revenues			Operating Income		Revenues from External Customers		Net Intersegment Revenues			Operating Income (Loss)
	(in millions)
Natural Gas Distribution	$	389	$	9		$	20	$	402	$	8		$	3
Energy Services	734		11			2		910		10			(9		)
Other Operations	3		—			1		—		—			(1		)
Eliminations	—		(20		)	—		—		(18		)	—
Consolidated	$	1,126	$	—		$	23	$	1,312	$	—		$	(7	)

	Nine Months Ended September 30,
	2019							2018
	Revenues from External Customers		Net Intersegment Revenues			Operating Income		Revenues from External Customers		Net Intersegment Revenues			Operating Income  (Loss)
	(in millions)
Natural Gas Distribution	$	2,077	$	29		$	212	$	2,032	$	26		$	166
Energy Services	2,755		91			64		3,008		57			(20		)
Corporate and Other	4		—			1		—		—			—
Eliminations	—		(120		)	—		—		(83		)	—
Consolidated	$	4,836	$	—		$	277	$	5,040	$	—		$	146

CenterPoint Energy and CERC

	Total Assets
	September 30, 2019							December 31, 2018
	CenterPoint  Energy				CERC			CenterPoint Energy				CERC
	(in millions)
Houston Electric T&D	$	11,463			$	—		$	10,509			$	—
Indiana Electric Integrated (1)	3,009				—			—				—
Natural Gas Distribution (1)	13,235				7,018			6,956				6,956
Energy Services	1,264				1,264			1,558				1,558
Infrastructure Services (1)	1,284				—			—				—
Midstream Investments	2,529				—			2,482				—
Corporate and Other (1)	4,884			(2)	121			6,156			(2)	66
Eliminations	(3,026		)		(474		)	(652		)		(366		)
Consolidated	$	34,642			$	7,929		$	27,009			$	8,214

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

(2)

Includes pension and other postemployment-related regulatory assets of $625 million and $665 million, respectively, as of September 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 September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
	(in millions)
Affiliates of NRG	$	231	$	213	$	547	$	543
Affiliates of Vistra Energy Corp.	83		79		196		192

Midstream Investments [Table Text Block]

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
	(in millions)
Enable	$	77	$	81	$	213	$	208