CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,383	$ 3,252
Less: Income from discontinued operations, net of income tax	0	(1,857)
Income from continuing operations, net of income tax	1,383	1,395
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	905	824
Deferred income taxes and investment tax credits	193	(94)
Equity earnings	(631)	(496)
Foreign currency transaction (gains) losses, net	(7)	110
Share-based compensation expense	34	36
Fixed-price contracts and other derivatives	199	7
Other	54	42
Net change in working capital components	(63)	375
Distributions from investments	532	220
Insurance receivable for Aliso Canyon costs	31	(166)
Changes in other noncurrent assets and liabilities, net	(375)	(185)
Net cash provided by continuing operations	2,255	2,068
Net cash used in discontinued operations	0	(1,041)
Net cash provided by operating activities	2,255	1,027
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(2,424)	(2,198)
Expenditures for investments and acquisitions	(165)	(140)
Proceeds from sale of assets	0	5
Purchases of nuclear decommissioning trust assets	(542)	(797)
Proceeds from sales of nuclear decommissioning trust assets	542	797
Advances to unconsolidated affiliates	(8)	(25)
Other	9	17
Net cash used in continuing operations	(2,588)	(2,341)
Net cash provided by discontinued operations	0	5,195
Net cash (used in) provided by investing activities	(2,588)	2,854
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid	(634)	(567)
Preferred dividends paid	(68)	(71)
Issuances of preferred stock	0	891
Issuances of common stock	5	13
Repurchases of common stock	(38)	(64)
Issuances of debt (maturities greater than 90 days)	285	4,059
Payments on debt (maturities greater than 90 days) and finance leases	(1,432)	(1,970)
Increase (decrease) in short-term debt, net	1,584	(1,871)
Advances from unconsolidated affiliates	20	64
Proceeds from sale of noncontrolling interests	7	0
Purchases of noncontrolling interests	(10)	(27)
Other	(1)	(16)
Net cash (used in) provided by continuing operations	(282)	441
Net cash provided by discontinued operations	0	401
Net cash (used in) provided by financing activities	(282)	842
Effect of exchange rate changes in continuing operations	1	(7)
Effect of exchange rate changes in discontinued operations	0	(3)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	1	(10)
(Decrease) increase in cash, cash equivalents and restricted cash, including discontinued operations	(614)	4,713
Cash, cash equivalents and restricted cash, including discontinued operations, January 1	985	217
Cash, cash equivalents and restricted cash, including discontinued operations, June 30	371	4,930
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized	488	540
Income tax payments, including discontinued operations, net of refunds	73	1,303
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Increase in Cameron LNG JV investment for guarantee	22	0
Accrued capital expenditures	526	434
Increase in finance lease obligations for investment in PP&E	24	56
Issuance of common stock in exchange for NCI and related AOCI	1,373	0
Distribution from Oncor Holdings	8	0
Equitization of long-term debt for deficit held by NCI	0	22
Conversion of mandatory convertible preferred stock	1,693	0
Common dividends issued in stock	0	22
Preferred stock [Member]
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Dividends declared but not paid	20	37
Common Stock [Member]
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Dividends declared but not paid	347	305
San Diego Gas and Electric Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	398	455
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	433	398
Deferred income taxes and investment tax credits	41	29
Other	(13)	(13)
Net change in working capital components	(136)	(36)
Changes in other noncurrent assets and liabilities, net	(113)	(95)
Net cash provided by operating activities	610	738
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(1,072)	(850)
Purchases of nuclear decommissioning trust assets	(542)	(797)
Proceeds from sales of nuclear decommissioning trust assets	542	797
Other	7	8
Net cash (used in) provided by investing activities	(1,065)	(842)
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid	0	(200)
Issuances of debt (maturities greater than 90 days)	0	799
Payments on debt (maturities greater than 90 days) and finance leases	(231)	(229)
Increase (decrease) in short-term debt, net	437	(80)
Debt issuance costs	0	(4)
Net cash (used in) provided by financing activities	206	286
(Decrease) increase in cash, cash equivalents and restricted cash, including discontinued operations	(249)	182
Cash, cash equivalents and restricted cash, including discontinued operations, January 1	262	10
Cash, cash equivalents and restricted cash, including discontinued operations, June 30	13	192
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized	201	198
Income tax payments, including discontinued operations, net of refunds	58	0
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued capital expenditures	192	136
Increase in ARO for investment in PP&E	18	0
Increase in finance lease obligations for investment in PP&E	13	20
Southern California Gas Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	502	450
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	353	321
Deferred income taxes and investment tax credits	18	(17)
Other	42	14
Net change in working capital components	297	713
Insurance receivable for Aliso Canyon costs	31	(166)
Changes in other noncurrent assets and liabilities, net	(280)	(117)
Net cash provided by operating activities	963	1,198
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(936)	(885)
Net cash (used in) provided by investing activities	(936)	(885)
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid	(50)	0
Preferred dividends paid	(1)	(1)
Issuances of debt (maturities greater than 90 days)	0	649
Payments on finance leases	(6)	(5)
Increase (decrease) in short-term debt, net	30	(630)
Debt issuance costs	0	(6)
Net cash (used in) provided by financing activities	(27)	7
(Decrease) increase in cash, cash equivalents and restricted cash, including discontinued operations	0	320
Cash, cash equivalents and restricted cash, including discontinued operations, January 1	4	10
Cash, cash equivalents and restricted cash, including discontinued operations, June 30	4	330
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized	76	70
Income tax payments, including discontinued operations, net of refunds	82	0
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued capital expenditures	156	158
Increase in finance lease obligations for investment in PP&E	11	36
Dividends declared but not paid	$ 25	$ 50