SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2015

Significant Accounting Policies

Schedule of weighted avg depreciation rates [Table Text Block]

	2015		2014		2013
SCE&G	2.55	%	2.85	%	2.96	%
GENCO	2.66	%	2.66	%	2.66	%
CGT	—		2.11	%	2.19	%
PSNC Energy	2.94	%	2.98	%	3.01	%
Weighted average of above	2.61	%	2.84	%	2.93	%

Schedule of Jointly Owned Utility Plants [Table Text Block]

As of December 31,	2015						2014
	Unit 1			New Units			Unit 1			New Units
Percent owned	66.7%			55.0%			66.7%			55.0%
Plant in service	$	1.2	billion	—			$	1.2	billion	—
Accumulated depreciation	$	620.4	million	—			$	578.3	million	—
Construction work in progress	$	214.6	million	$	3.4	billion	$	199.3	million	$	2.7	billion

SCE&G

Significant Accounting Policies

Schedule of Jointly Owned Utility Plants [Table Text Block]

As of December 31,	2015						2014
	Unit 1			New Units			Unit 1			New Units
Percent owned	66.7%			55.0%			66.7%			55.0%
Plant in service	$	1.2	billion	—			$	1.2	billion	—
Accumulated depreciation	$	620.4	million	—			$	578.3	million	—
Construction work in progress	$	214.6	million	$	3.4	billion	$	199.3	million	$	2.7	billion