LONG-TERM AND SHORT-TERM DEBT (Tables)

9 Months Ended

Sep. 30, 2017

Short-term Debt [Line Items]

Schedule of Line of Credit Facilities [Table Text Block]

September 30, 2017 (Millions of dollars)	Total		SCANA			Consolidated SCE&G			PSNC  Energy
Lines of credit:	+
Five-year, expiring December 2020	$	1,300.0	$	400.0		$	700.0		$	200.0
Fuel Company five-year, expiring December 2020	500.0		—			500.0			—
Three-year, expiring December 2018	200.0		—			200.0			—
Total committed long-term	2,000.0		400.0			1,400.0			200.0
Outstanding commercial paper (270 or fewer days)	1,022.1		33.0			944.8			44.3
Weighted average interest rate			1.78		%	1.49		%	1.49		%
Letters of credit supported by LOC	3.3		3.0			0.3			—
Available	$	974.6	$	364.0		$	454.9		$	155.7

December 31, 2016 (Millions of dollars)	Total		SCANA			Consolidated SCE&G			PSNC  Energy
Lines of credit:
Five-year, expiring December 2020	$	1,300.0	$	400.0		$	700.0		$	200.0
Fuel Company five-year, expiring December 2020	500.0		—			500.0			—
Three-year, expiring December 2018	200.0		—			200.0			—
Total committed long-term	2,000.0		400.0			1,400.0			200.0
Outstanding commercial paper (270 or fewer days)	940.5		64.4			804.3			71.8
Weighted average interest rate			1.43		%	1.04		%	1.07		%
Letters of credit supported by LOC	3.3		3.0			0.3			—
Available	$	1,056.2	$	332.6		$	595.4		$	128.2

SCEG

Short-term Debt [Line Items]

Schedule of Line of Credit Facilities [Table Text Block]

September 30, 2017 (Millions of dollars)	Total		SCANA			Consolidated SCE&G			PSNC  Energy
Lines of credit:	+
Five-year, expiring December 2020	$	1,300.0	$	400.0		$	700.0		$	200.0
Fuel Company five-year, expiring December 2020	500.0		—			500.0			—
Three-year, expiring December 2018	200.0		—			200.0			—
Total committed long-term	2,000.0		400.0			1,400.0			200.0
Outstanding commercial paper (270 or fewer days)	1,022.1		33.0			944.8			44.3
Weighted average interest rate			1.78		%	1.49		%	1.49		%
Letters of credit supported by LOC	3.3		3.0			0.3			—
Available	$	974.6	$	364.0		$	454.9		$	155.7

December 31, 2016 (Millions of dollars)	Total		SCANA			Consolidated SCE&G			PSNC  Energy
Lines of credit:
Five-year, expiring December 2020	$	1,300.0	$	400.0		$	700.0		$	200.0
Fuel Company five-year, expiring December 2020	500.0		—			500.0			—
Three-year, expiring December 2018	200.0		—			200.0			—
Total committed long-term	2,000.0		400.0			1,400.0			200.0
Outstanding commercial paper (270 or fewer days)	940.5		64.4			804.3			71.8
Weighted average interest rate			1.43		%	1.04		%	1.07		%
Letters of credit supported by LOC	3.3		3.0			0.3			—
Available	$	1,056.2	$	332.6		$	595.4		$	128.2