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Revenue Recognition (Tables)
 6 Months Ended
Jun. 30, 2019
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue [Table Text Block]
The following tables disaggregate revenues by reportable segment and major source:

CenterPoint Energy
 
 
Three Months Ended June 30, 2019
 
 
Houston Electric T&D (1)
 
Indiana
 Electric Integrated (1)
 
Natural Gas Distribution (1)
 
Energy
Services (2)
 
Infrastructure Services (2)
 
Corporate and Other (2)
 
Total
 
 
(in millions)
Revenue from contracts
 
$
768

 
$
140

 
$
657

 
$
87

 
$
326

 
$
78

 
$
2,056

Derivatives income
 
—

 
—

 
—

 
768

 
—

 
—

 
768

Other (3)
 
(3
)
 
—

 
3

 
—

 
—

 
2

 
2

Eliminations
 
—

 
—

 
(10
)
 
(17
)
 
(1
)
 
—

 
(28
)
Total revenues
 
$
765

 
$
140

 
$
650

 
$
838

 
$
325

 
$
80

 
$
2,798

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Six Months Ended June 30, 2019
 
 
Houston Electric T&D (1)
 
Indiana
 Electric Integrated (1) (4)
 
Natural Gas Distribution (1) (4)
 
Energy
Services (2)
 
Infrastructure Services (2) (4)
 
Corporate and Other (2) (4)
 
Total
 
 
(in millions)
Revenue from contracts
 
$
1,458

 
$
223

 
$
2,063

 
$
260

 
$
472

 
$
119

 
$
4,595

Derivatives income
 
3

 
—

 
—

 
1,841

 
—

 
—

 
1,844

Other (3)
 
(7
)
 
—

 
(4
)
 
—

 
—

 
3

 
(8
)
Eliminations
 
—

 
—

 
(20
)
 
(81
)
 
(1
)
 
—

 
(102
)
Total revenues
 
$
1,454

 
$
223

 
$
2,039

 
$
2,020

 
$
471

 
$
122

 
$
6,329


 
 
Three Months Ended June 30, 2018
 
 
Houston Electric T&D (1)
 
Indiana
Electric Integrated (1)
 
Natural Gas Distribution (1)
 
Energy
Services (2)
 
Infrastructure Services (2)
 
Corporate and Other (2)
 
Total
 
 
(in millions)
Revenue from contracts
 
$
860

 
$
—

 
$
509

 
$
78

 
$
—

 
$
2

 
$
1,449

Derivatives income
 
—

 
—

 
—

 
782

 
—

 
—

 
782

Other (3)
 
(6
)
 
—

 
(14
)
 
—

 
—

 
2

 
(18
)
Eliminations
 
—

 
—

 
(8
)
 
(19
)
 
—

 
—

 
(27
)
Total revenues
 
$
854

 
$
—

 
$
487

 
$
841

 
$
—

 
$
4

 
$
2,186

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Six Months Ended June 30, 2018
 
 
Houston Electric T&D (1)
 
Indiana
Electric Integrated (1)
 
Natural Gas Distribution (1)
 
Energy
Services (2)
 
Infrastructure Services (2)
 
Corporate and Other (2)
 
Total
 
 
(in millions)
Revenue from contracts
 
$
1,621

 
$
—

 
$
1,695

 
$
256

 
$
—

 
$
3

 
$
3,575

Derivatives income
 
(4
)
 
—

 
—

 
1,889

 
—

 
—

 
1,885

Other (3)
 
(12
)
 
—

 
(47
)
 
—

 
—

 
5

 
(54
)
Eliminations
 
—

 
—

 
(18
)
 
(47
)
 
—

 
—

 
(65
)
Total revenues
 
$
1,605

 
$
—

 
$
1,630

 
$
2,098

 
$
—

 
$
8

 
$
5,341


(1)
Reflected in Utility revenues in the Condensed Statements of Consolidated Income.

(2)
Reflected in Non-utility revenues in the Condensed Statements of Consolidated Income.

(3)
Primarily consists of income from ARPs and leases. ARPs are contracts between the utility and its regulators, not between the utility and a customer. The Registrants recognize ARP revenue as other revenues when the regulator-specified conditions for recognition have been met. Upon recovery of ARP revenue through incorporation in rates charged for utility service to customers, ARP revenue is reversed and recorded as revenue from contracts with customers. The recognition of ARP revenues and the reversal of ARP revenues upon recovery through rates charged for utility service may not occur in the same period.

(4)
Reflects revenues from Vectren subsidiaries for the period from February 1, 2019 to June 30, 2019.

Houston Electric
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
 
2019
 
2018
 
2019
 
2018
 
 
(in millions)
Revenue from contracts
 
$
768

 
$
860

 
$
1,458

 
$
1,621

Other (1)
 
(3
)
 
(6
)
 
(7
)
 
(12
)
Total revenues
 
$
765

 
$
854

 
$
1,451

 
$
1,609


(1)
Primarily consists of income from ARPs and leases. ARPs are contracts between the utility and its regulators, not between the utility and a customer. The Registrants recognize ARP revenue as other revenues when the regulator-specified conditions for recognition have been met. Upon recovery of ARP revenue through incorporation in rates charged for utility service to customers, ARP revenue is reversed and recorded as revenue from contracts with customers. The recognition of ARP revenues and the reversal of ARP revenues upon recovery through rates charged for utility service may not occur in the same period.

CERC
 
 
Three Months Ended June 30,
 
 
2019
 
2018
 
 
Natural Gas Distribution (1)
 
Energy
 Services
 (2)
 
Other Operations (2)
 
Total
 
Natural Gas Distribution (1)
 
Energy
 Services
 (2)
 
Other Operations (2)
 
Total
 
 
(in millions)
Revenue from contracts
 
$
510

 
$
87

 
$
—

 
$
597

 
$
509

 
$
78

 
$
—

 
$
587

Derivatives income
 
—

 
768

 
—

 
768

 
—

 
782

 
—

 
782

Other (3)
 
3

 
—

 
—

 
3

 
(14
)
 
—

 
—

 
(14
)
Eliminations
 
(10
)
 
(16
)
 
—

 
(26
)
 
(8
)
 
(19
)
 
—

 
(27
)
Total revenues
 
$
503

 
$
839

 
$
—

 
$
1,342

 
$
487

 
$
841

 
$
—

 
$
1,328

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Six Months Ended June 30,
 
 
2019
 
2018
 
 
Natural Gas Distribution (1)
 
Energy
 Services (2)
 
Corporate and Other (2)
 
Total
 
Natural Gas Distribution (1)
 
Energy
 Services (2)
 
Corporate and Other (2)
 
Total
 
 
(in millions)
Revenue from contracts
 
$
1,708

 
$
260

 
$
1

 
$
1,969

 
$
1,695

 
$
256

 
$
—

 
$
1,951

Derivatives income
 
—

 
1,841

 
—

 
1,841

 
—

 
1,889

 
—

 
1,889

Other (3)
 
—

 
—

 
—

 
—

 
(47
)
 
—

 
—

 
(47
)
Eliminations
 
(20
)
 
(80
)
 
—

 
(100
)
 
(18
)
 
(47
)
 
—

 
(65
)
Total revenues
 
$
1,688

 
$
2,021

 
$
1

 
$
3,710

 
$
1,630

 
$
2,098

 
$
—

 
$
3,728


(1)
Reflected in Utility revenues in the Condensed Statements of Consolidated Income.

(2)
Reflected in Non-utility revenues in the Condensed Statements of Consolidated Income.

(3)
Primarily consists of income from ARPs and leases. ARPs are contracts between the utility and its regulators, not between the utility and a customer. The Registrants recognize ARP revenue as other revenues when the regulator-specified conditions for recognition have been met. Upon recovery of ARP revenue through incorporation in rates charged for utility service to customers, ARP revenue is reversed and recorded as revenue from contracts with customers. The recognition of ARP revenues and the reversal of ARP revenues upon recovery through rates charged for utility service may not occur in the same period.
Contract with Customer, Asset and Liability [Table Text Block]
The opening and closing balances of accounts receivable, other accrued unbilled revenue, contract assets and contract liabilities from contracts with customers for the six months ended June 30, 2019 are as follows:

CenterPoint Energy
 
Accounts Receivable
 
Other Accrued Unbilled Revenues
 
Contract
Assets
 
Contract Liabilities
 
(in millions)
Opening balance as of December 31, 2018 (1)
$
763

 
$
575

 
$
37

 
$
47

Closing balance as of June 30, 2019
831

 
362

 
56

 
54

Increase (decrease)
$
68

 
$
(213
)
 
$
19

 
$
7


(1)
Opening balances related to Vectren are as of February 1, 2019.

The amount of revenue recognized in the six-month period ended June 30, 2019 that was included in the opening contract liability was $38 million. The difference between the opening and closing balances of the contract liabilities primarily results from the timing difference between CenterPoint Energy’s performance and the customer’s payment.

Houston Electric
 
Accounts Receivable
 
Other Accrued Unbilled Revenues
 
Contract Liabilities
 
(in millions)
Opening balance as of December 31, 2018
$
234

 
$
110

 
$
3

Closing balance as of June 30, 2019
305

 
122

 
5

Increase
$
71

 
$
12

 
$
2


The amount of revenue recognized in the six-month period ended June 30, 2019 that was included in the opening contract liability was $2 million. The difference between the opening and closing balances of the contract liabilities primarily results from the timing difference between Houston Electric’s performance and the customer’s payment.

CERC
 
Accounts Receivable
 
Other Accrued Unbilled Revenues
 
(in millions)
Opening balance as of December 31, 2018
$
282

 
$
263

Closing balance as of June 30, 2019
191

 
87

Decrease
$
(91
)
 
$
(176
)

CERC does not have any opening or closing contract asset or contract liability balances.
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]
Remaining Performance Obligations (CenterPoint Energy). The table below discloses (1) the aggregate amount of the transaction price allocated to performance obligations that are unsatisfied (or partially unsatisfied) as of the end of the reporting period for contracts and (2) when CenterPoint Energy expects to recognize this revenue. Such contracts include fixed price contracts in the Infrastructure Services reportable segment.
 
Rolling 12 Months
 
Thereafter
 
Total
 
(in millions)
Revenue expected to be recognized on contracts in place as of June 30, 2019:
 
 
 
 
 
Fixed price (bid)
$
317

 
$
—

 
$
317

 
$
317

 
$
—

 
$
317