CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017		Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income		$ 452		$ 364	[1],[2]
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		360		328	[1],[2]
Deferred income taxes and investment tax credits		268		78	[1]
Equity losses		5		5	[1]
Fixed-price contracts and other derivatives		(106)		4	[1]
Other		(22)		36	[1]
Net change in other working capital components		84		165	[1]
Insurance receivable for Aliso Canyon costs		(15)		(335)	[1]
Changes in other assets		(41)		(29)	[1]
Changes in other liabilities		19		10	[1]
Net cash provided by operating activities		1,004		626	[1]
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment		(992)		(971)	[1]
Expenditures for investments		(59)		(30)	[1]
Distributions from investments		17		9	[1]
Purchases of nuclear decommissioning and other trust assets		(350)		(94)	[1]
Proceeds from sales by nuclear decommissioning and other trusts		357		93	[1]
Increases in restricted cash		(93)		(16)	[1]
Decreases in restricted cash		93		20	[1]
Advances to unconsolidated affiliates		(5)		(6)	[1]
Repayments of advances to unconsolidated affiliates		2		9	[1]
Other		4		(3)	[1]
Net cash used in investing activities		(1,026)		(989)	[1]
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid		(176)		(161)	[1]
Issuances of common stock		17		15	[1]
Repurchases of common stock		(14)		(54)	[1]
Issuances of debt (maturities greater than 90 days)		542		55	[1]
Payments on debt (maturities greater than 90 days)		(313)		(54)	[1]
(Decrease) increase in short-term debt, net		(97)		531	[1]
Other		(5)		(2)	[1]
Net cash (used in) provided by financing activities		(46)		330	[1]
Effect of exchange rate changes on cash and cash equivalents		9		6	[1]
Increase (decrease) in cash and cash equivalents		(59)		(27)	[1]
Cash and cash equivalents, January 1		349	[3]	403	[1]
Cash and cash equivalents, March 31		290		376	[1]
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized		106		97	[1]
Income tax payments, net of refunds		47		41	[1]
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued capital expenditures		378		423	[1]
Equitization of note receivable due from unconsolidated affiliate		19		0	[1]
Common dividends issued in stock		13		13	[1]
Dividends declared but not paid		216		197	[1]
San Diego Gas and Electric Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income		157		137	[1],[2]
Net income		155		136	[2]
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		163		159	[1],[2]
Deferred income taxes and investment tax credits		34		13	[1]
Fixed-price contracts and other derivatives		0		(1)	[1]
Other		(12)		(9)	[1]
Net change in other working capital components		84		103	[1]
Changes in other assets		(34)		(34)	[1]
Changes in other liabilities		(6)		1	[1]
Net cash provided by operating activities		386		369	[1]
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment		(418)		(329)	[1]
Purchases of nuclear decommissioning trust assets		(350)		(93)	[1]
Proceeds from sales by nuclear decommissioning trusts		357		93	[1]
Increases in restricted cash		(10)		(10)	[1]
Decreases in restricted cash		9		10	[1]
(Increase) decrease in loans to affiliate, net		31		0	[1]
Other		0		(1)	[1]
Net cash used in investing activities		(381)		(330)	[1]
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid		(175)		0	[1]
Payments on debt (maturities greater than 90 days)		(160)		(20)	[1]
(Decrease) increase in short-term debt, net		343		(2)	[1]
Capital distributions made by VIE		(3)		(1)	[1]
Net cash (used in) provided by financing activities		5		(23)	[1]
Increase (decrease) in cash and cash equivalents		10		16	[1]
Cash and cash equivalents, January 1		8	[3]	20	[1]
Cash and cash equivalents, March 31		18		36	[1]
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized		40		46	[1]
Income tax payments, net of refunds		0		(8)	[1]
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued capital expenditures		126		104	[1]
Southern California Gas Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	[2]	203		199	[1]
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		126		122	[1],[2]
Deferred income taxes and investment tax credits		80		55	[1]
Other		(5)		(7)	[1]
Net change in other working capital components		96		243	[1]
Insurance receivable for Aliso Canyon costs		(15)		(335)	[1]
Changes in other assets		(21)		(37)	[1]
Changes in other liabilities		(1)		1	[1]
Net cash provided by operating activities		463		241	[1]
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment		(357)		(340)	[1]
(Increase) decrease in loans to affiliate, net		(35)		50	[1]
Net cash used in investing activities		(392)		(290)	[1]
CASH FLOWS FROM FINANCING ACTIVITIES
(Decrease) increase in short-term debt, net		(62)		5	[1]
Net cash (used in) provided by financing activities		(62)		5	[1]
Increase (decrease) in cash and cash equivalents		9		(44)	[1]
Cash and cash equivalents, January 1		12	[3]	58	[1]
Cash and cash equivalents, March 31		21		14	[1]
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized		16		17	[1]
Income tax payments, net of refunds		0		3	[1]
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued capital expenditures		$ 147		$ 148	[1]

[1] As adjusted for the adoption of ASU 2016-09 as of January 1, 2016.

[2] As adjusted for the adoption of ASU 2016-09 as of January 1, 2016.

[3] Derived from audited financial statements.