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COMMITMENTS AND CONTINGENCIES ARO (Tables)
 12 Months Ended
Dec. 31, 2018
Change in Asset Retirement Obligations [Line Items]  
Change in Asset Retirement Obligations [Table Text Block]
A reconciliation of the beginning and ending aggregate carrying amount of AROs is as follows: 
 
 
The Company
 
Consolidated SCE&G
Millions of dollars
 
2018
 
2017
 
2018
 
2017
Beginning balance
 
$
568

 
$
558

 
$
529

 
$
522

Liabilities incurred
 
—

 
—

 
—

 
—

Liabilities settled
 
(15
)
 
(10
)
 
(15
)
 
(9
)
Accretion expense
 
25

 
25

 
23

 
23

Revisions in estimated cash flows
 
(1
)
 
(5
)
 
4

 
(7
)
Ending balance
 
$
577

 
$
568

 
$
541

 
$
529
SCE&G  
Change in Asset Retirement Obligations [Line Items]  
Change in Asset Retirement Obligations [Table Text Block]
A reconciliation of the beginning and ending aggregate carrying amount of AROs is as follows: 
 
 
The Company
 
Consolidated SCE&G
Millions of dollars
 
2018
 
2017
 
2018
 
2017
Beginning balance
 
$
568

 
$
558

 
$
529

 
$
522

Liabilities incurred
 
—

 
—

 
—

 
—

Liabilities settled
 
(15
)
 
(10
)
 
(15
)
 
(9
)
Accretion expense
 
25

 
25

 
23

 
23

Revisions in estimated cash flows
 
(1
)
 
(5
)
 
4

 
(7
)
Ending balance
 
$
577

 
$
568

 
$
541

 
$
529