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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Planned Capital Expenditures
At December 31, 2017, estimated capital expenditures for 2018 through 2022 for which applicable internal approvals (and also, if required, regulatory approvals such as FPSC approvals for FPL) have been received were as follows:
 
2018
 
2019
 
2020
 
2021
 
2022
 
Total
 
(millions)
FPL:
 
 
 
 
 
 
 
 
 
 
 
Generation:(a)
 
 
 
 
 
 
 
 
 
 
 
New(b)
$
665

 
$
555

 
$
1,250

 
$
1,105

 
$
1,110

 
$
4,685

Existing
1,365

 
695

 
485

 
530

 
490

 
3,565

Transmission and distribution
2,395

 
2,155

 
2,280

 
2,545

 
2,570

 
11,945

Nuclear fuel
170

 
150

 
135

 
145

 
165

 
765

General and other
460

 
325

 
290

 
300

 
280

 
1,655

Total
$
5,055

 
$
3,880

 
$
4,440

 
$
4,625

 
$
4,615

 
$
22,615

NEER:
 

 
 

 
 

 
 

 
 

 
 

Wind(c)
$
2,105

 
$
1,810

 
$
110

 
$
40

 
$
40

 
$
4,105

Solar(d)
85

 
—

 
—

 
—

 
—

 
85

Nuclear, including nuclear fuel
265

 
225

 
205

 
195

 
240

 
1,130

Natural gas pipelines(e)
955

 
50

 
25

 
10

 
25

 
1,065

Other
655

 
50

 
45

 
35

 
35

 
820

Total
$
4,065

 
$
2,135

 
$
385

 
$
280

 
$
340

 
$
7,205

Corporate and Other
$
45

 
$
25

 
$
20

 
$
15

 
$
5

 
$
110

______________________
(a)
Includes AFUDC of approximately $118 million, $58 million, $49 million, $33 million and $16 million for 2018 through 2022, respectively.
(b)
Includes land, generation structures, transmission interconnection and integration and licensing.
(c)
Consists of capital expenditures for new wind projects, repowering of existing wind projects and related transmission totaling approximately 3,600 MW.
(d)
Includes capital expenditures for new solar projects and related transmission totaling approximately 140 MW.
(e)
Includes equity contributions associated with an equity investment in a joint venture that is constructing a natural gas pipeline. The natural gas pipeline is pending FERC approval to proceed with construction.
Required Capacity and/or Minimum Payments

The required capacity and/or minimum payments under contracts, including those discussed above at December 31, 2017, were estimated as follows:
 
2018
 
2019
 
2020
 
2021
 
2022
 
Thereafter
 
(millions)
FPL:
 
 
 
 
 
 
 
 
 
 
 
Capacity charges(a)
$
20

 
$
20

 
$
20

 
$
20

 
$
20

 
$
225

Minimum charges, at projected prices:(b)
 
 
 
 
 
 
 
 
 
 
 
Natural gas, including transportation and storage(c)
$
1,310

 
$
865

 
$
910

 
$
905

 
$
895

 
$
11,240

Coal, including transportation
$
35

 
$
5

 
$
—

 
$
—

 
$
—

 
$
—

NEER
$
1,700

 
$
205

 
$
120

 
$
80

 
$
100

 
$
290

Corporate and Other(d)(e)
$
80

 
$
15

 
$
15

 
$
10

 
$
—

 
$
—

______________________
(a)
Capacity charges, substantially all of which are recoverable through the capacity clause, totaled approximately $72 million, $175 million and $434 million for the years ended December 31, 2017, 2016 and 2015, respectively. Energy charges, which are recoverable through the fuel clause, totaled approximately $90 million, $126 million and $262 million for the years ended December 31, 2017, 2016 and 2015, respectively.
(b)
Recoverable through the fuel clause.
(c)
Includes approximately $295 million, $290 million, $360 million, $390 million, $390 million and $7,175 million in 2018 through 2022 and thereafter, respectively, of firm commitments related to the natural gas transportation agreements with Sabal Trail and Florida Southeast Connection, LLC.
(d)
Includes an approximately $75 million commitment to invest in clean power and technology businesses through 2021.
(e)
Excludes approximately $60 million in 2018 of joint obligations of NEECH and NEER which are included in the NEER amounts above.