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Revenue Recognition
 3 Months Ended
Mar. 31, 2019
Revenue from Contract with Customer [Abstract]  
Revenue Recognition
Revenue Recognition
Performance Obligations
As of March 31, 2019, estimated future fixed fee performance obligations are $500 million, $500 million, $535 million, $284 million and $29 million for fiscal years 2019, 2020, 2021, 2022 and 2023, respectively. These performance obligations are for cleared auction MWs in the PJM, ISO-NE, NYISO and MISO capacity auctions and are subject to penalties for non performance.
 
Disaggregated Revenues     
The following table represents the Company’s disaggregation of revenue from contracts with customers for the three months ended March 31, 2019 and March 31, 2018, along with the reportable segment for each category:
 
Three months ended March 31, 2019
 
 
 
Generation
 
 
 
 
(In millions)
Retail
 
Texas
 
East/West/Other
 
Subtotal
 
Corporate/Eliminations
 
Total
Energy revenue(a)(b)
$
—

 
$
358

 
$
224

 
$
582

 
$
(276
)
 
$
306

Capacity revenue(a)
—

 
—

 
155

 
155

 
(1
)
 
154

Retail revenue
 
 
 
 
 
 
 
 
 
 
 
Mass customers
1,321

 
—

 
—

 
—

 
(1
)
 
1,320

Business Solutions customers
286

 
—

 
—

 
—

 
—

 
286

Total retail revenue
1,607

 
—

 
—

 
—

 
(1
)
 
1,606

Mark-to-market for economic hedging activities(b)(c)
—

 
13

 
(8
)
 
5

 
15

 
20

Other revenues(a)
—

 
29

 
52

 
81

 
(2
)
 
79

Total operating revenue
1,607

 
400

 
423

 
823

 
(265
)
 
2,165

Less: Lease revenue
3

 
—

 
2

 
2

 
—

 
5

Less: Realized and unrealized ASC 815 revenue(b)
—

 
546

 
97

 
643

 
(262
)
 
381

Total revenue from contracts with customers
$
1,604

 
$
(146
)
 
$
324

 
$
178

 
$
(3
)
 
$
1,779

(a) The following amounts of energy and capacity revenue primarily relate to derivative instruments and are accounted for under ASC 815
 
Retail
 
Texas
 
East/West/Other
 
Subtotal
 
Corporate/Eliminations
 
Total
Energy revenue
$
—

 
$
525

 
$
88

 
$
613

 
$
(277
)
 
$
336

Capacity revenue
—

 
—

 
18

 
18

 
—

 
18

Other revenue
—

 
8

 
(1
)
 
7

 
—

 
7

(b) Generation includes higher revenues due to the Company's large internal transfer of power based on average annualized market prices, which are offset by higher cost of operations within Retail
(c) Revenue relates entirely to unrealized gains and losses on derivative instruments accounted for under ASC 815
 
 
Three months ended March 31, 2018
 
 
 
Generation
 
 
 
 
(In millions)
Retail
 
Texas
 
East/West/Other
 
Subtotal
 
Corporate/Eliminations
 
Total
Energy revenue(a)(b)
$
—

 
$
265

 
$
339

 
$
604

 
$
(161
)
 
$
443

Capacity revenue(a)
—

 
—

 
142

 
142

 
—

 
142

Retail revenue
 
 
 
 
 
 
 
 
 
 
 
Mass customers
1,176

 
—

 
—

 
—

 
(1
)
 
1,175

Business Solutions customers
310

 
—

 
—

 
—

 
—

 
310

Total retail revenue
1,486

 
—

 
—

 
—

 
(1
)
 
1,485

Mark-to-market for economic hedging activities(b)(c)
(6
)
 
(569
)
 
(5
)
 
(574
)
 
484

 
(96
)
Other revenues(a)
—

 
53

 
45

 
98

 
(7
)
 
91

Total operating revenue
1,480

 
(251
)
 
521

 
270

 
315

 
2,065

Less: Lease revenue
3

 
—

 
2

 
2

 
—

 
5

Less: Realized and unrealized ASC 815 revenue(b)
(6
)
 
(150
)
 
85

 
(65
)
 
327

 
256

Total revenue from contracts with customers
$
1,483

 
$
(101
)
 
$
434

 
$
333

 
$
(12
)
 
$
1,804

(a) The following amounts of energy and capacity revenue relate to derivative instruments and are accounted for under ASC 815
 
Retail
 
Texas
 
East/West/Other
 
Subtotal
 
Corporate/Eliminations
 
Total
Energy revenue
$
—

 
$
413

 
$
60

 
$
473

 
$
(157
)
 
$
316

Capacity revenue
—

 
—

 
26

 
26

 
—

 
26

Other revenue
—

 
5

 
3

 
8

 
—

 
8

(b) Generation includes higher revenues due to the Company's large internal transfer of power based on average annualized market prices, which are offset by higher cost of operations within Retail
(c) Revenue relates entirely to unrealized gains and losses on derivative instruments accounted for under ASC 815


Contract Balances
The following table reflects the contract assets and liabilities included in the Company’s balance sheet as of March 31, 2019 and December 31, 2018:
(In millions)
March 31, 2019
 
December 31, 2018
Deferred customer acquisition costs
$
117

 
$
111

 
 
 
 
Accounts receivable, net - Contracts with customers
870

 
999

Accounts receivable, net - Derivative instruments
22

 
20

Accounts receivable, net - Affiliate
6

 
5

Total accounts receivable, net
$
898

 
$
1,024

 
 
 
 
Unbilled revenues (included within Accounts receivable, net - Contracts with customers)
$
305

 
$
392

Deferred revenues
80

 
67