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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Legal Reserves
The following tables contain information regarding reserves for probable and estimable costs related to the various environmental sites. These reserves are recorded in Accounts payable within Current Liabilities and Other within Other Noncurrent Liabilities on the Consolidated Balance Sheets.
 
 
 
Duke

 
 
 
Duke

 
Duke

 
Duke

 
Duke

 
 
Duke

 
Energy

 
Progress

 
Energy

 
Energy

 
Energy

 
Energy

 
(in millions)
Energy

 
Carolinas

 
Energy

 
Progress

 
Florida

 
Ohio

 
Indiana

Piedmont

Balance at December 31, 2016
$
98

 
$
10

 
$
18

 
$
3

 
$
14

 
$
59

 
$
10

$
1

Provisions/adjustments
8

 
3

 
3

 
2

 
2

 
3

 
(4
)
1

Cash reductions
(25
)
 
(3
)
 
(6
)
 
(2
)
 
(4
)
 
(15
)
 
(1
)
—

Balance at December 31, 2017
81

 
10

 
15

 
3

 
12

 
47

 
5

2

Provisions/adjustments
26

 
3

 
2

 
3

 
(2
)
 
21

 
1

1

Cash reductions
(30
)
 
(2
)
 
(6
)
 
(2
)
 
(4
)
 
(20
)
 
(1
)
(1
)
Balance at December 31, 2018
77

 
11

 
11

 
4

 
6

 
48

 
5

2

Provisions/adjustments
33

 
6

 
9

 
2

 
5

 
11

 
—

7

Cash reductions
(52
)
 
(6
)
 
(4
)
 
(2
)
 
(2
)
 
(40
)
 
(1
)
(1
)
Balance at December 31, 2019
$
58

 
$
11

 
$
16

 
$
4

 
$
9

 
$
19

 
$
4

$
8


The table below presents recorded reserves based on management’s best estimate of probable loss for legal matters, excluding asbestos-related reserves. Reserves are classified on the Consolidated Balance Sheets in Other within Other Noncurrent Liabilities and Other within Current Liabilities. The reasonably possible range of loss in excess of recorded reserves is not material, other than as described above.
 
December 31,
(in millions)  
2019

 
2018

Reserves for Legal Matters
 
 
 
Duke Energy
$
62

 
$
65

Duke Energy Carolinas
2

 
9

Progress Energy
55

 
54

Duke Energy Progress
12

 
12

Duke Energy Florida
22

 
24

Piedmont
1

 
1
Schedule of Additional Possible Losses in Excess of Recorded Environmental Reserves
Additional losses in excess of recorded reserves that could be incurred for the stages of investigation, remediation and monitoring for environmental sites that have been evaluated at this time are not material except as presented in the table below.
(in millions)
 
Duke Energy
$
59

Duke Energy Carolinas
11

Duke Energy Ohio
42

Piedmont
2
Schedule of Purchase Power Obligations
The following table presents executory purchased power contracts with terms exceeding one year, excluding contracts classified as leases.
 
 
 
Minimum Purchase Amount at December 31, 2019
 
Contract
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(in millions)
Expiration
 
2020

 
2021

 
2022

 
2023

 
2024

 
Thereafter

 
Total

Duke Energy Progress(a)
2021-2032
 
$
46

 
$
66

 
$
63

 
$
55

 
$
56

 
$
123

 
$
409

Duke Energy Florida(b)
2021-2025
 
374

 
356

 
354

 
374

 
262

 
91

 
1,811

Duke Energy Ohio(c)(d)
2021-2022
 
132

 
107

 
32

 
—

 
—

 
—

 
271

(a)
Contracts represent either 100% of net plant output or vary.
(b)
Contracts represent between 81% and 100% of net plant output.
(c)
Contracts represent between 1% and 9% of net plant output.
(d)
Excludes PPA with OVEC. See Note 18 for additional information.
Schedule of Natural Gas Supply Contract Commitments
The following table presents future unconditional purchase obligations under natural gas supply and capacity contracts as of December 31, 2019.
(in millions)
Duke Energy
Duke Energy Ohio
Piedmont
2020
$
297

$
39

$
258

2021
280

33

247

2022
225

14

211

2023
129

3

126

2024
118

—

118

Thereafter
714

—

714

Total
$
1,763

$
89

$
1,674