CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 928	$ 947
Less: Income from discontinued operations, net of income tax	0	(80)
Income from continuing operations, net of income tax	928	867
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	442	412
Deferred income taxes and investment tax credits	97	(243)
Equity earnings	(318)	(263)
Foreign currency transaction losses, net	19	123
Share-based compensation expense	17	22
Unrealized Gain (Loss) on Derivatives and Commodity Contracts	130	68
Other	59	56
Net change in working capital components	84	217
Distributions from investments	208	73
Insurance receivable for Aliso Canyon costs	31	(172)
Changes in other noncurrent assets and liabilities, net	(195)	90
Net cash provided by continuing operations	1,502	1,250
Net cash provided by discontinued operations	0	68
Net cash provided by operating activities	1,502	1,318
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(1,181)	(1,010)
Expenditures for investments and acquisitions	(115)	(86)
Proceeds from sale of assets	0	5
Purchases of nuclear decommissioning trust assets	(288)	(552)
Proceeds from sales of nuclear decommissioning trust assets	288	552
Advances to unconsolidated affiliates	(8)	(30)
Intercompany activities with discontinued operations, net	0	(3)
Other	3	8
Net cash used in continuing operations	(1,301)	(1,116)
Net cash used in discontinued operations	0	(65)
Net cash used in investing activities	(1,301)	(1,181)
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid	(301)	(269)
Preferred dividends paid	(36)	(36)
Issuances of common stock	0	11
Repurchases of common stock	(37)	(57)
Issuances of debt (maturities greater than 90 days)	102	1,619
Payments on debt (maturities greater than 90 days) and finance leases	(1,093)	(1,433)
Decrease in short-term debt, net	932	2,127
Advances from unconsolidated affiliates	20	64
Proceeds from sale of noncontrolling interests	7	0
Purchases of noncontrolling interests	0	(16)
Intercompany activities with discontinued operations, net	0	(2)
Other	(1)	(5)
Net cash (used in) provided by continuing operations	(407)	2,003
Net cash provided by discontinued operations	0	111
Net cash (used in) provided by financing activities	(407)	2,114
Effect of exchange rate changes in continuing operations	(1)	(6)
Effect of exchange rate changes in discontinued operations	0	(8)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(1)	(14)
(Decrease) increase in cash, cash equivalents and restricted cash, including discontinued operations	(207)	2,237
Cash, cash equivalents and restricted cash, including discontinued operations, January 1	985	217
Cash, cash equivalents and restricted cash, including discontinued operations, March 31	778	2,454
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized	225	263
Income tax payments, including discontinued operations, net of refunds	30	68
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued capital expenditures	499	437
Increase in finance lease obligations for investment in property, plant and equipment	15	20
Equitization of long-term debt for deficit held by NCI	0	22
Common dividends issued in stock	0	14
Preferred stock [Member]
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Dividends declared but not paid	32	36
Common Stock [Member]
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Dividends declared but not paid	333	306
San Diego Gas and Electric Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	212	262
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	213	201
Deferred income taxes and investment tax credits	27	(8)
Other	1	(10)
Net change in working capital components	16	73
Changes in other noncurrent assets and liabilities, net	(73)	(20)
Net cash provided by operating activities	396	498
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(555)	(402)
Purchases of nuclear decommissioning trust assets	(288)	(552)
Proceeds from sales of nuclear decommissioning trust assets	288	552
Net cash used in investing activities	(555)	(402)
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid	0	(200)
Issuances of debt (maturities greater than 90 days)	0	400
Payments on debt (maturities greater than 90 days) and finance leases	(224)	(23)
Decrease in short-term debt, net	130	(80)
Net cash (used in) provided by financing activities	(94)	97
(Decrease) increase in cash, cash equivalents and restricted cash, including discontinued operations	(253)	193
Cash, cash equivalents and restricted cash, including discontinued operations, January 1	262	10
Cash, cash equivalents and restricted cash, including discontinued operations, March 31	9	203
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized	75	79
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued capital expenditures	146	128
Increase in finance lease obligations for investment in property, plant and equipment	6	4
Southern California Gas Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	407	303
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	173	159
Deferred income taxes and investment tax credits	(14)	4
Other	27	6
Net change in working capital components	299	343
Insurance receivable for Aliso Canyon costs	31	(172)
Changes in other noncurrent assets and liabilities, net	(124)	114
Net cash provided by operating activities	799	757
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(459)	(388)
Net cash used in investing activities	(459)	(388)
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid	(25)	0
Issuances of debt (maturities greater than 90 days)	0	649
Payments on finance leases	(3)	(3)
Decrease in short-term debt, net	(113)	(630)
Debt issuance costs	0	(6)
Net cash (used in) provided by financing activities	(141)	10
(Decrease) increase in cash, cash equivalents and restricted cash, including discontinued operations	199	379
Cash, cash equivalents and restricted cash, including discontinued operations, January 1	4	10
Cash, cash equivalents and restricted cash, including discontinued operations, March 31	203	389
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized	44	37
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued capital expenditures	150	126
Increase in finance lease obligations for investment in property, plant and equipment	9	16
Dividends declared but not paid	$ 25	$ 0