FAIR VALUE MEASUREMENTS 2 (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nuclear decommissioning trusts - equity securities	$ 652		$ 614
Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	106		117
Nuclear decomissioning trusts - Municipal debt securities	114		111
Nuclear decommissioning trusts - Other debt securities	196		153
Nuclear decommissioning trusts - Total debt securities	416		381
Total nuclear decommissioning trusts	1,068	[1]	995	[1]
Interest rate instruments, assets	62		56
Commodity contracts subject to rate recovery, assets	128		133
Commodity contracts not subject to rate recovery, assets	19		23
Total fair value of assets measured on a recurring basis	1,277		1,207
Interest rate instruments, liabilities	119		117
Commodity contracts subject to rate recovery, liabilities	12		13
Commodity contracts not subject to rate recovery, liabilities	3		7
Total fair value of liabilities measured on a recurring basis	134		137
San Diego Gas and Electric Company and Subsidiary [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nuclear decommissioning trusts - equity securities	652		614
Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	106		117
Nuclear decomissioning trusts - Municipal debt securities	114		111
Nuclear decommissioning trusts - Other debt securities	196		153
Nuclear decommissioning trusts - Total debt securities	416		381
Total nuclear decommissioning trusts	1,068	[1]	995	[1]
Commodity contracts subject to rate recovery, assets	125		130
Commodity contracts not subject to rate recovery, assets	1		1
Total fair value of assets measured on a recurring basis	1,194		1,126
Interest rate instruments, liabilities	53		55
Commodity contracts subject to rate recovery, liabilities	11		12
Total fair value of liabilities measured on a recurring basis	64		67
Southern California Gas Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity contracts subject to rate recovery, assets	2		3
Commodity contracts not subject to rate recovery, assets	3		2
Total fair value of assets measured on a recurring basis	5		5
Commodity contracts subject to rate recovery, liabilities	1		1
Total fair value of liabilities measured on a recurring basis	1		1
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nuclear decommissioning trusts - equity securities	652		614
Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	51		59
Nuclear decomissioning trusts - Municipal debt securities	0		0
Nuclear decommissioning trusts - Other debt securities	0		0
Nuclear decommissioning trusts - Total debt securities	51		59
Total nuclear decommissioning trusts	703	[1]	673	[1]
Interest rate instruments, assets	0		0
Commodity contracts subject to rate recovery, assets	8		2
Commodity contracts not subject to rate recovery, assets	3		1
Total fair value of assets measured on a recurring basis	714		676
Interest rate instruments, liabilities	0		0
Commodity contracts subject to rate recovery, liabilities	0		0
Commodity contracts not subject to rate recovery, liabilities	0		4
Total fair value of liabilities measured on a recurring basis	0		4
Level 1 | San Diego Gas and Electric Company and Subsidiary [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nuclear decommissioning trusts - equity securities	652		614
Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	51		59
Nuclear decomissioning trusts - Municipal debt securities	0		0
Nuclear decommissioning trusts - Other debt securities	0		0
Nuclear decommissioning trusts - Total debt securities	51		59
Total nuclear decommissioning trusts	703	[1]	673	[1]
Commodity contracts subject to rate recovery, assets	8		1
Commodity contracts not subject to rate recovery, assets	0		0
Total fair value of assets measured on a recurring basis	711		674
Interest rate instruments, liabilities	0		0
Commodity contracts subject to rate recovery, liabilities	0		0
Total fair value of liabilities measured on a recurring basis	0		0
Level 1 | Southern California Gas Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity contracts subject to rate recovery, assets	0		1
Commodity contracts not subject to rate recovery, assets	0		0
Total fair value of assets measured on a recurring basis	0		1
Commodity contracts subject to rate recovery, liabilities	0		0
Total fair value of liabilities measured on a recurring basis	0		0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nuclear decommissioning trusts - equity securities	0		0
Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	55		58
Nuclear decomissioning trusts - Municipal debt securities	114		111
Nuclear decommissioning trusts - Other debt securities	196		153
Nuclear decommissioning trusts - Total debt securities	365		322
Total nuclear decommissioning trusts	365	[1]	322	[1]
Interest rate instruments, assets	62		56
Commodity contracts subject to rate recovery, assets	3		1
Commodity contracts not subject to rate recovery, assets	4		5
Total fair value of assets measured on a recurring basis	434		384
Interest rate instruments, liabilities	119		117
Commodity contracts subject to rate recovery, liabilities	12		13
Commodity contracts not subject to rate recovery, liabilities	3		8
Total fair value of liabilities measured on a recurring basis	134		138
Level 2 | San Diego Gas and Electric Company and Subsidiary [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nuclear decommissioning trusts - equity securities	0		0
Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	55		58
Nuclear decomissioning trusts - Municipal debt securities	114		111
Nuclear decommissioning trusts - Other debt securities	196		153
Nuclear decommissioning trusts - Total debt securities	365		322
Total nuclear decommissioning trusts	365	[1]	322	[1]
Commodity contracts subject to rate recovery, assets	2		1
Commodity contracts not subject to rate recovery, assets	0		0
Total fair value of assets measured on a recurring basis	367		323
Interest rate instruments, liabilities	53		55
Commodity contracts subject to rate recovery, liabilities	11		12
Total fair value of liabilities measured on a recurring basis	64		67
Level 2 | Southern California Gas Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity contracts subject to rate recovery, assets	0		0
Commodity contracts not subject to rate recovery, assets	1		0
Total fair value of assets measured on a recurring basis	1		0
Commodity contracts subject to rate recovery, liabilities	1		1
Total fair value of liabilities measured on a recurring basis	1		1
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nuclear decommissioning trusts - equity securities	0		0
Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	0		0
Nuclear decomissioning trusts - Municipal debt securities	0		0
Nuclear decommissioning trusts - Other debt securities	0		0
Nuclear decommissioning trusts - Total debt securities	0		0
Total nuclear decommissioning trusts	0	[1]	0	[1]
Interest rate instruments, assets	0		0
Commodity contracts subject to rate recovery, assets	85		99
Commodity contracts not subject to rate recovery, assets	0		0
Total fair value of assets measured on a recurring basis	85		99
Interest rate instruments, liabilities	0		0
Commodity contracts subject to rate recovery, liabilities	0		0
Commodity contracts not subject to rate recovery, liabilities	0		0
Total fair value of liabilities measured on a recurring basis	0		0
Level 3 | San Diego Gas and Electric Company and Subsidiary [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nuclear decommissioning trusts - equity securities	0		0
Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	0		0
Nuclear decomissioning trusts - Municipal debt securities	0		0
Nuclear decommissioning trusts - Other debt securities	0		0
Nuclear decommissioning trusts - Total debt securities	0		0
Total nuclear decommissioning trusts	0	[1]	0	[1]
Commodity contracts subject to rate recovery, assets	85		99
Commodity contracts not subject to rate recovery, assets	0		0
Total fair value of assets measured on a recurring basis	85		99
Interest rate instruments, liabilities	0		0
Commodity contracts subject to rate recovery, liabilities	0		0
Total fair value of liabilities measured on a recurring basis	0		0
Level 3 | Southern California Gas Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity contracts subject to rate recovery, assets	0		0
Commodity contracts not subject to rate recovery, assets	0		0
Total fair value of assets measured on a recurring basis	0		0
Commodity contracts subject to rate recovery, liabilities	0		0
Total fair value of liabilities measured on a recurring basis	0		0
Collateral Netted [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nuclear decommissioning trusts - equity securities	0	[2]	0	[2]
Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	0	[2]	0	[2]
Nuclear decomissioning trusts - Municipal debt securities	0	[2]	0	[2]
Nuclear decommissioning trusts - Other debt securities	0	[2]	0	[2]
Nuclear decommissioning trusts - Total debt securities	0	[2]	0	[2]
Total nuclear decommissioning trusts	0	[1],[2]	0	[1],[2]
Interest rate instruments, assets	0	[2]	0	[2]
Commodity contracts subject to rate recovery, assets	32	[2]	31	[2]
Commodity contracts not subject to rate recovery, assets	12	[2]	17	[2]
Total fair value of assets measured on a recurring basis	44	[2]	48	[2]
Interest rate instruments, liabilities	0	[2]	0	[2]
Commodity contracts subject to rate recovery, liabilities	0	[2]	0	[2]
Commodity contracts not subject to rate recovery, liabilities	0	[2]	(5)	[2]
Total fair value of liabilities measured on a recurring basis	0	[2]	(5)	[2]
Collateral Netted [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nuclear decommissioning trusts - equity securities	0	[2]	0	[2]
Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	0	[2]	0	[2]
Nuclear decomissioning trusts - Municipal debt securities	0	[2]	0	[2]
Nuclear decommissioning trusts - Other debt securities	0	[2]	0	[2]
Nuclear decommissioning trusts - Total debt securities	0	[2]	0	[2]
Total nuclear decommissioning trusts	0	[1],[2]	0	[1],[2]
Commodity contracts subject to rate recovery, assets	30	[2]	29	[2]
Commodity contracts not subject to rate recovery, assets	1	[2]	1	[2]
Total fair value of assets measured on a recurring basis	31	[2]	30	[2]
Interest rate instruments, liabilities	0	[2]	0	[2]
Commodity contracts subject to rate recovery, liabilities	0	[2]	0	[2]
Total fair value of liabilities measured on a recurring basis	0	[2]	0	[2]
Collateral Netted [Member] | Southern California Gas Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity contracts subject to rate recovery, assets	2	[2]	2	[2]
Commodity contracts not subject to rate recovery, assets	2	[2]	2	[2]
Total fair value of assets measured on a recurring basis	4	[2]	4	[2]
Commodity contracts subject to rate recovery, liabilities	0	[2]	0	[2]
Total fair value of liabilities measured on a recurring basis	$ 0	[2]	$ 0	[2]

[1] Excludes cash balances and cash equivalents.

[2] Includes the effect of the contractual ability to settle contracts under master netting agreements and with cash collateral, as well as cash collateral not offset.