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Revenue Recognition (Tables)
 3 Months Ended
Mar. 31, 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 March 31, 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
 
$
690

 
$
83

 
$
1,406

 
$
173

 
$
146

 
$
41

 
$
2,539

Derivatives income
 
3

 
—

 
—

 
1,073

 
—

 
—

 
1,076

Other (3)
 
(4
)
 
—

 
(7
)
 
—

 
—

 
1

 
(10
)
Eliminations
 
—

 
—

 
(10
)
 
(64
)
 
—

 
—

 
(74
)
Total revenues
 
$
689

 
$
83

 
$
1,389

 
$
1,182

 
$
146

 
$
42

 
$
3,531


 
 
Three Months Ended March 31, 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
 
$
761

 
$
—

 
$
1,186

 
$
178

 
$
—

 
$
1

 
$
2,126

Derivatives income
 
(4
)
 
—

 
—

 
1,107

 
—

 
—

 
1,103

Other (3)
 
(6
)
 
—

 
(33
)
 
—

 
—

 
3

 
(36
)
Eliminations
 
—

 
—

 
(10
)
 
(28
)
 
—

 
—

 
(38
)
Total revenues
 
$
751

 
$
—

 
$
1,143

 
$
1,257

 
$
—

 
$
4

 
$
3,155


(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 March 31, 2019.

Houston Electric
 
 
 
Three Months Ended March 31,
 
 
 
2019
 
2018
 
 
(in millions)
Revenue from contracts
 
 
$
690

 
$
761

Other (1)
 
 
(4
)
 
(6
)
Total revenues
 
 
$
686

 
$
755


(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 March 31,
 
 
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
 
$
1,198

 
$
173

 
$
1

 
$
1,372

 
$
1,186

 
$
178

 
$
—

 
$
1,364

Derivatives income
 
—

 
1,073

 
—

 
1,073

 
—

 
1,107

 
—

 
1,107

Other (3)
 
(3
)
 
—

 
—

 
(3
)
 
(33
)
 
—

 
—

 
(33
)
Eliminations
 
(10
)
 
(64
)
 
—

 
(74
)
 
(10
)
 
(28
)
 
—

 
(38
)
Total revenues
 
$
1,185

 
$
1,182

 
$
1

 
$
2,368

 
$
1,143

 
$
1,257

 
$
—

 
$
2,400


(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.
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 February 1, 2019:
 
 
 
 
 
Fixed price (bid)
$
455

 
$
—

 
$
455

 
$
455

 
$
—

 
$
455