FAIR VALUE MEASUREMENTS 2 (Details) - USD ($)
$ in Millions |
Jun. 30, 2015 |
Dec. 31, 2014 |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Nuclear decommissioning trusts - equity securities |
|
$ 665
|
$ 655
|
| Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies |
|
98
|
109
|
| Nuclear decomissioning trusts - Municipal debt securities |
|
152
|
129
|
| Nuclear decommissioning trusts - Other debt securities |
|
209
|
207
|
| Nuclear decommissioning trusts - Total debt securities |
|
459
|
445
|
| Total nuclear decommissioning trusts |
[1] |
1,124
|
1,100
|
| Interest rate instruments, assets |
|
43
|
48
|
| Commodity contracts not subject to rate recovery, assets |
|
36
|
33
|
| Commodity contracts subject to rate recovery, assets |
|
115
|
122
|
| Total fair value of assets measured on a recurring basis |
|
1,318
|
1,303
|
| Interest rate instruments, liabilities |
|
172
|
155
|
| Commodity contracts not subject to rate recovery, liabilities |
|
2
|
8
|
| Commodity contracts subject to rate recovery, liabilities |
|
57
|
16
|
| Total fair value of liabilities measured on a recurring basis |
|
231
|
179
|
| San Diego Gas and Electric Company [Member] |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Nuclear decommissioning trusts - equity securities |
|
665
|
655
|
| Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies |
|
98
|
109
|
| Nuclear decomissioning trusts - Municipal debt securities |
|
152
|
129
|
| Nuclear decommissioning trusts - Other debt securities |
|
209
|
207
|
| Nuclear decommissioning trusts - Total debt securities |
|
459
|
445
|
| Total nuclear decommissioning trusts |
[1] |
1,124
|
1,100
|
| Commodity contracts not subject to rate recovery, assets |
|
1
|
|
| Commodity contracts subject to rate recovery, assets |
|
113
|
119
|
| Total fair value of assets measured on a recurring basis |
|
1,238
|
1,219
|
| Interest rate instruments, liabilities |
|
43
|
47
|
| Commodity contracts not subject to rate recovery, liabilities |
|
0
|
0
|
| Commodity contracts subject to rate recovery, liabilities |
|
57
|
15
|
| Total fair value of liabilities measured on a recurring basis |
|
100
|
62
|
| Southern California Gas Company [Member] |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Commodity contracts not subject to rate recovery, assets |
|
2
|
|
| Commodity contracts subject to rate recovery, assets |
|
2
|
3
|
| Total fair value of assets measured on a recurring basis |
|
4
|
3
|
| Commodity contracts not subject to rate recovery, liabilities |
|
0
|
0
|
| Commodity contracts subject to rate recovery, liabilities |
|
|
1
|
| Total fair value of liabilities measured on a recurring basis |
|
0
|
1
|
| Level 1 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Nuclear decommissioning trusts - equity securities |
|
665
|
655
|
| Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies |
|
50
|
62
|
| Nuclear decomissioning trusts - Municipal debt securities |
|
0
|
0
|
| Nuclear decommissioning trusts - Other debt securities |
|
0
|
0
|
| Nuclear decommissioning trusts - Total debt securities |
|
50
|
62
|
| Total nuclear decommissioning trusts |
[1] |
715
|
717
|
| Interest rate instruments, assets |
|
0
|
0
|
| Commodity contracts not subject to rate recovery, assets |
|
6
|
28
|
| Commodity contracts subject to rate recovery, assets |
|
0
|
0
|
| Total fair value of assets measured on a recurring basis |
|
721
|
745
|
| Interest rate instruments, liabilities |
|
0
|
0
|
| Commodity contracts not subject to rate recovery, liabilities |
|
4
|
3
|
| Commodity contracts subject to rate recovery, liabilities |
|
0
|
0
|
| Total fair value of liabilities measured on a recurring basis |
|
4
|
3
|
| Level 1 | San Diego Gas and Electric Company [Member] |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Nuclear decommissioning trusts - equity securities |
|
665
|
655
|
| Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies |
|
50
|
62
|
| Nuclear decomissioning trusts - Municipal debt securities |
|
0
|
0
|
| Nuclear decommissioning trusts - Other debt securities |
|
0
|
0
|
| Nuclear decommissioning trusts - Total debt securities |
|
50
|
62
|
| Total nuclear decommissioning trusts |
[1] |
715
|
717
|
| Commodity contracts not subject to rate recovery, assets |
|
0
|
|
| Commodity contracts subject to rate recovery, assets |
|
0
|
0
|
| Total fair value of assets measured on a recurring basis |
|
715
|
717
|
| Interest rate instruments, liabilities |
|
0
|
0
|
| Commodity contracts not subject to rate recovery, liabilities |
|
1
|
1
|
| Commodity contracts subject to rate recovery, liabilities |
|
0
|
0
|
| Total fair value of liabilities measured on a recurring basis |
|
1
|
1
|
| Level 1 | Southern California Gas Company [Member] |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Commodity contracts not subject to rate recovery, assets |
|
0
|
|
| Commodity contracts subject to rate recovery, assets |
|
0
|
0
|
| Total fair value of assets measured on a recurring basis |
|
0
|
0
|
| Commodity contracts not subject to rate recovery, liabilities |
|
1
|
2
|
| Commodity contracts subject to rate recovery, liabilities |
|
|
0
|
| Total fair value of liabilities measured on a recurring basis |
|
1
|
2
|
| 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 |
|
48
|
47
|
| Nuclear decomissioning trusts - Municipal debt securities |
|
152
|
129
|
| Nuclear decommissioning trusts - Other debt securities |
|
209
|
207
|
| Nuclear decommissioning trusts - Total debt securities |
|
409
|
383
|
| Total nuclear decommissioning trusts |
[1] |
409
|
383
|
| Interest rate instruments, assets |
|
43
|
48
|
| Commodity contracts not subject to rate recovery, assets |
|
13
|
16
|
| Commodity contracts subject to rate recovery, assets |
|
1
|
1
|
| Total fair value of assets measured on a recurring basis |
|
466
|
448
|
| Interest rate instruments, liabilities |
|
172
|
155
|
| Commodity contracts not subject to rate recovery, liabilities |
|
4
|
9
|
| Commodity contracts subject to rate recovery, liabilities |
|
54
|
52
|
| Total fair value of liabilities measured on a recurring basis |
|
230
|
216
|
| Level 2 | San Diego Gas and Electric Company [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 |
|
48
|
47
|
| Nuclear decomissioning trusts - Municipal debt securities |
|
152
|
129
|
| Nuclear decommissioning trusts - Other debt securities |
|
209
|
207
|
| Nuclear decommissioning trusts - Total debt securities |
|
409
|
383
|
| Total nuclear decommissioning trusts |
[1] |
409
|
383
|
| Commodity contracts not subject to rate recovery, assets |
|
0
|
|
| Commodity contracts subject to rate recovery, assets |
|
0
|
0
|
| Total fair value of assets measured on a recurring basis |
|
409
|
383
|
| Interest rate instruments, liabilities |
|
43
|
47
|
| Commodity contracts not subject to rate recovery, liabilities |
|
0
|
0
|
| Commodity contracts subject to rate recovery, liabilities |
|
54
|
51
|
| Total fair value of liabilities measured on a recurring basis |
|
97
|
98
|
| Level 2 | Southern California Gas Company [Member] |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Commodity contracts not subject to rate recovery, assets |
|
0
|
|
| Commodity contracts subject to rate recovery, assets |
|
1
|
1
|
| Total fair value of assets measured on a recurring basis |
|
1
|
1
|
| Commodity contracts not subject to rate recovery, liabilities |
|
0
|
0
|
| Commodity contracts subject to rate recovery, liabilities |
|
|
1
|
| Total fair value of liabilities measured on a recurring basis |
|
0
|
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 |
[1] |
0
|
0
|
| Interest rate instruments, assets |
|
0
|
0
|
| Commodity contracts not subject to rate recovery, assets |
|
0
|
0
|
| Commodity contracts subject to rate recovery, assets |
|
87
|
107
|
| Total fair value of assets measured on a recurring basis |
|
87
|
107
|
| Interest rate instruments, liabilities |
|
0
|
0
|
| Commodity contracts not subject to rate recovery, liabilities |
|
0
|
0
|
| Commodity contracts subject to rate recovery, liabilities |
|
45
|
0
|
| Total fair value of liabilities measured on a recurring basis |
|
45
|
0
|
| Level 3 | San Diego Gas and Electric Company [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 |
[1] |
0
|
0
|
| Commodity contracts not subject to rate recovery, assets |
|
0
|
|
| Commodity contracts subject to rate recovery, assets |
|
87
|
107
|
| Total fair value of assets measured on a recurring basis |
|
87
|
107
|
| Interest rate instruments, liabilities |
|
0
|
0
|
| Commodity contracts not subject to rate recovery, liabilities |
|
0
|
0
|
| Commodity contracts subject to rate recovery, liabilities |
|
45
|
0
|
| Total fair value of liabilities measured on a recurring basis |
|
45
|
0
|
| Level 3 | Southern California Gas Company [Member] |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Commodity contracts not subject to rate recovery, assets |
|
0
|
|
| Commodity contracts subject to rate recovery, assets |
|
0
|
0
|
| Total fair value of assets measured on a recurring basis |
|
0
|
0
|
| Commodity contracts not subject to rate recovery, liabilities |
|
0
|
0
|
| Commodity contracts subject to rate recovery, liabilities |
|
|
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 |
[2] |
0
|
0
|
| Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies |
[2] |
0
|
0
|
| Nuclear decomissioning trusts - Municipal debt securities |
[2] |
0
|
0
|
| Nuclear decommissioning trusts - Other debt securities |
[2] |
0
|
0
|
| Nuclear decommissioning trusts - Total debt securities |
[2] |
0
|
0
|
| Total nuclear decommissioning trusts |
[1],[2] |
0
|
0
|
| Interest rate instruments, assets |
[2] |
0
|
0
|
| Commodity contracts not subject to rate recovery, assets |
[2] |
17
|
(11)
|
| Commodity contracts subject to rate recovery, assets |
[2] |
27
|
14
|
| Total fair value of assets measured on a recurring basis |
[2] |
44
|
3
|
| Interest rate instruments, liabilities |
[2] |
0
|
0
|
| Commodity contracts not subject to rate recovery, liabilities |
[2] |
(6)
|
(4)
|
| Commodity contracts subject to rate recovery, liabilities |
[2] |
(42)
|
(36)
|
| Total fair value of liabilities measured on a recurring basis |
[2] |
(48)
|
(40)
|
| Collateral Netted [Member] | San Diego Gas and Electric Company [Member] |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Nuclear decommissioning trusts - equity securities |
[2] |
0
|
0
|
| Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies |
[2] |
0
|
0
|
| Nuclear decomissioning trusts - Municipal debt securities |
[2] |
0
|
0
|
| Nuclear decommissioning trusts - Other debt securities |
[2] |
0
|
0
|
| Nuclear decommissioning trusts - Total debt securities |
[2] |
0
|
0
|
| Total nuclear decommissioning trusts |
[1],[2] |
0
|
0
|
| Commodity contracts not subject to rate recovery, assets |
[2] |
1
|
|
| Commodity contracts subject to rate recovery, assets |
[2] |
26
|
12
|
| Total fair value of assets measured on a recurring basis |
[2] |
27
|
12
|
| Interest rate instruments, liabilities |
[2] |
0
|
0
|
| Commodity contracts not subject to rate recovery, liabilities |
[2] |
(1)
|
(1)
|
| Commodity contracts subject to rate recovery, liabilities |
[2] |
(42)
|
(36)
|
| Total fair value of liabilities measured on a recurring basis |
[2] |
(43)
|
(37)
|
| Collateral Netted [Member] | Southern California Gas Company [Member] |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Commodity contracts not subject to rate recovery, assets |
[2] |
2
|
|
| Commodity contracts subject to rate recovery, assets |
[2] |
1
|
2
|
| Total fair value of assets measured on a recurring basis |
[2] |
3
|
2
|
| Commodity contracts not subject to rate recovery, liabilities |
[2] |
(1)
|
(2)
|
| Commodity contracts subject to rate recovery, liabilities |
[2] |
|
0
|
| Total fair value of liabilities measured on a recurring basis |
[2] |
$ (1)
|
$ (2)
|
|
|