OTHER FINANCIAL DATA - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($)
$ in Millions |
3 Months Ended |
9 Months Ended |
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
| Accumulated Other Comprehensive Income (Loss) [Line Items] |
|
|
|
|
|
| AOCI, beginning balance |
$ (852)
|
$ (596)
|
$ (806)
|
[1] |
$ (497)
|
| Other comprehensive income (loss), before reclassifications |
(20)
|
(171)
|
(71)
|
|
(273)
|
| Amounts reclassified from accumulated other comprehensive income |
7
|
6
|
12
|
|
9
|
| Total other comprehensive loss |
(13)
|
(165)
|
(59)
|
|
(264)
|
| AOCI, ending balance |
(865)
|
(761)
|
(865)
|
|
(761)
|
| Foreign currency translation adjustments [Member] |
|
|
|
|
|
| Accumulated Other Comprehensive Income (Loss) [Line Items] |
|
|
|
|
|
| AOCI, beginning balance |
(503)
|
(427)
|
(582)
|
|
(322)
|
| Other comprehensive income (loss), before reclassifications |
(28)
|
(92)
|
51
|
|
(197)
|
| Amounts reclassified from accumulated other comprehensive income |
0
|
0
|
0
|
|
0
|
| Total other comprehensive loss |
(28)
|
(92)
|
51
|
|
(197)
|
| AOCI, ending balance |
(531)
|
(519)
|
(531)
|
|
(519)
|
| Financial instruments [Member] |
|
|
|
|
|
| Accumulated Other Comprehensive Income (Loss) [Line Items] |
|
|
|
|
|
| AOCI, beginning balance |
(264)
|
(86)
|
(137)
|
|
(90)
|
| Other comprehensive income (loss), before reclassifications |
8
|
(79)
|
(122)
|
|
(76)
|
| Amounts reclassified from accumulated other comprehensive income |
5
|
1
|
8
|
|
2
|
| Total other comprehensive loss |
13
|
(78)
|
(114)
|
|
(74)
|
| AOCI, ending balance |
(251)
|
(164)
|
(251)
|
|
(164)
|
| Pension and other postretirement benefits [Member] |
|
|
|
|
|
| Accumulated Other Comprehensive Income (Loss) [Line Items] |
|
|
|
|
|
| AOCI, beginning balance |
(85)
|
(83)
|
(87)
|
|
(85)
|
| Other comprehensive income (loss), before reclassifications |
0
|
0
|
0
|
|
0
|
| Amounts reclassified from accumulated other comprehensive income |
2
|
5
|
4
|
|
7
|
| Total other comprehensive loss |
2
|
5
|
4
|
|
7
|
| AOCI, ending balance |
(83)
|
(78)
|
(83)
|
|
(78)
|
| Southern California Gas Company [Member] |
|
|
|
|
|
| Accumulated Other Comprehensive Income (Loss) [Line Items] |
|
|
|
|
|
| AOCI, beginning balance |
(19)
|
(18)
|
(19)
|
[1] |
(18)
|
| Amounts reclassified from accumulated other comprehensive income |
1
|
0
|
1
|
|
0
|
| Total other comprehensive loss |
1
|
|
1
|
|
|
| AOCI, ending balance |
(18)
|
(18)
|
(18)
|
|
(18)
|
| Southern California Gas Company [Member] | Financial instruments [Member] |
|
|
|
|
|
| Accumulated Other Comprehensive Income (Loss) [Line Items] |
|
|
|
|
|
| AOCI, beginning balance |
(14)
|
(14)
|
(14)
|
|
(14)
|
| Amounts reclassified from accumulated other comprehensive income |
1
|
|
1
|
|
|
| Total other comprehensive loss |
1
|
|
1
|
|
|
| AOCI, ending balance |
(13)
|
(14)
|
(13)
|
|
(14)
|
| Southern California Gas Company [Member] | Pension and other postretirement benefits [Member] |
|
|
|
|
|
| Accumulated Other Comprehensive Income (Loss) [Line Items] |
|
|
|
|
|
| AOCI, beginning balance |
(5)
|
(4)
|
(5)
|
|
(4)
|
| Amounts reclassified from accumulated other comprehensive income |
0
|
|
0
|
|
|
| Total other comprehensive loss |
0
|
|
0
|
|
|
| AOCI, ending balance |
$ (5)
|
$ (4)
|
$ (5)
|
|
$ (4)
|
|
|