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Revenue Recognition (Tables)
 9 Months Ended
Sep. 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 September 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
 
$
861

 
$
165

 
$
518

 
$
81

 
$
377

 
$
91

 
$
2,093

Derivatives income
 
—

 
—

 
—

 
664

 
—

 
—

 
664

Other (3)
 
(2
)
 
—

 
6

 
—

 
—

 
2

 
6

Eliminations
 
—

 
—

 
(9
)
 
(11
)
 
(1
)
 
—

 
(21
)
Total revenues
 
$
859

 
$
165

 
$
515

 
$
734

 
$
376

 
$
93

 
$
2,742

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Nine Months Ended September 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
 
$
2,319

 
$
388

 
$
2,581

 
$
341

 
$
849

 
$
210

 
$
6,688

Derivatives income
 
3

 
—

 
—

 
2,505

 
—

 
—

 
2,508

Other (3)
 
(9
)
 
—

 
2

 
—

 
—

 
5

 
(2
)
Eliminations
 
—

 
—

 
(29
)
 
(92
)
 
(2
)
 
—

 
(123
)
Total revenues
 
$
2,313

 
$
388

 
$
2,554

 
$
2,754

 
$
847

 
$
215

 
$
9,071


 
 
Three Months Ended September 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
 
$
904

 
$
—

 
$
398

 
$
82

 
$
—

 
$
1

 
$
1,385

Derivatives income
 
—

 
—

 
—

 
838

 
—

 
—

 
838

Other (3)
 
(7
)
 
—

 
12

 
—

 
—

 
2

 
7

Eliminations
 
—

 
—

 
(8
)
 
(10
)
 
—

 
—

 
(18
)
Total revenues
 
$
897

 
$
—

 
$
402

 
$
910

 
$
—

 
$
3

 
$
2,212

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Nine Months Ended September 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
 
$
2,525

 
$
—

 
$
2,093

 
$
338

 
$
—

 
$
4

 
$
4,960

Derivatives income
 
(4
)
 
—

 
—

 
2,727

 
—

 
—

 
2,723

Other (3)
 
(19
)
 
—

 
(35
)
 
—

 
—

 
7

 
(47
)
Eliminations
 
—

 
—

 
(26
)
 
(57
)
 
—

 
—

 
(83
)
Total revenues
 
$
2,502

 
$
—

 
$
2,032

 
$
3,008

 
$
—

 
$
11

 
$
7,553


(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 September 30, 2019.

Houston Electric
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2019
 
2018
 
2019
 
2018
 
(in millions)
Revenue from contracts
$
861

 
$
904

 
$
2,319

 
$
2,525

Other (1)
(2
)
 
(7
)
 
(9
)
 
(19
)
Total revenues
$
859

 
$
897

 
$
2,310

 
$
2,506


(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 September 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
 
$
393

 
$
81

 
$
3

 
$
477

 
$
398

 
$
82

 
$
—

 
$
480

Derivatives income
 
—

 
664

 
—

 
664

 
—

 
838

 
—

 
838

Other (3)
 
5

 
—

 
—

 
5

 
12

 
—

 
—

 
12

Eliminations
 
(9
)
 
(11
)
 
—

 
(20
)
 
(8
)
 
(10
)
 
—

 
(18
)
Total revenues
 
$
389

 
$
734

 
$
3

 
$
1,126

 
$
402

 
$
910

 
$
—

 
$
1,312

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Nine Months Ended September 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
 
$
2,101

 
$
341

 
$
4

 
$
2,446

 
$
2,093

 
$
338

 
$
—

 
$
2,431

Derivatives income
 
—

 
2,505

 
—

 
2,505

 
—

 
2,727

 
—

 
2,727

Other (3)
 
5

 
—

 
—

 
5

 
(35
)
 
—

 
—

 
(35
)
Eliminations
 
(29
)
 
(91
)
 
—

 
(120
)
 
(26
)
 
(57
)
 
—

 
(83
)
Total revenues
 
$
2,077

 
$
2,755

 
$
4

 
$
4,836

 
$
2,032

 
$
3,008

 
$
—

 
$
5,040


(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 nine months ended September 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 September 30, 2019
779

 
403

 
75

 
42

Increase (decrease)
$
16

 
$
(172
)
 
$
38

 
$
(5
)

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

The amount of revenue recognized in the nine-month period ended September 30, 2019 that was included in the opening contract liability was $46 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 September 30, 2019
325

 
136

 
4

Increase
$
91

 
$
26

 
$
1


The amount of revenue recognized in the nine-month period ended September 30, 2019 that was included in the opening contract liability was $3 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 September 30, 2019
137

 
82

Decrease
$
(145
)
 
$
(181
)

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 September 30, 2019:
 
 
 
 
 
Fixed price (bid)
$
365

 
$
—

 
$
365

 
$
365

 
$
—

 
$
365