CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)		Dec. 31, 2016 USD ($)
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,126	$ 351	[1]	$ 1,519	[1]
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,549	1,490	[1]	1,312	[1]
Deferred income taxes and investment tax credits	(182)	1,160		217
Write-off of wildfire regulatory asset	0	351	[1]	0	[1]
Impairment losses	1,122	72	[1]	153	[1]
Gain on sale of assets	(524)	(3)		(134)
Remeasurement of equity method investment	0	0		(617)
Equity earnings, net	(176)	(76)		(84)
Share-based compensation expense	83	82		52
Fixed-price contracts and other derivatives	(10)	7		21
Other	315	67		10
Net change in other working capital components	173	57		(59)
Insurance receivable for Aliso Canyon costs	(43)	188		(281)
Changes in other noncurrent assets and liabilities, net	14	(121)		202
Changes in working capital components:
Accounts receivable	(144)	17		(42)
Income taxes receivable, net	83	(70)		3
Inventories	23	(49)		(20)
Regulatory balancing accounts	263	108		198
Other current assets	(81)	(12)		(41)
Accounts payable	92	83		122
Reserve for Aliso Canyon costs	56	31		(221)
Other current liabilities	(119)	(51)		(58)
Net cash provided by operating activities	3,447	3,625		2,311
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(3,784)	(3,949)		(4,214)
Expenditures for investments and acquisitions, net of cash, cash equivalents and restricted cash acquired	(10,376)	(270)		(1,504)
Proceeds from sale of assets, net of cash and restricted cash sold	1,593	17		763
Distributions from investments	10	26		25
Purchases of nuclear decommissioning trust assets	(890)	(1,314)		(1,034)
Proceeds from sales by nuclear decommissioning trust assets	890	1,314		1,134
Advances to unconsolidated affiliates	(102)	(531)		(25)
Repayments of advances to unconsolidated affiliates	71	9		11
Other	31	(2)		9
Net cash used in investing activities	(12,557)	(4,700)		(4,835)
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid	(877)	(755)		(686)
Preferred dividends paid	(89)	0		0
Preferred dividends paid by subsidiary	1	1		1
Issuances of mandatory convertible preferred stock, net of $42 in offering costs in 2018	2,258	0		0
Issuances of common stock, net of $41 in offering costs in 2018	2,272	47		51
Repurchases of common stock	(21)	(15)		(56)
Issuances of debt (maturities greater than 90 days)	9,174	4,509		2,951
Payments on debt (maturities greater than 90 days)	(3,510)	(2,800)		(2,057)
(Decrease) increase in short-term debt, net	(124)	(36)		692
Advances from unconsolidated affiliates	0	35		0
Proceeds from sale of noncontrolling interests, net of $1, $3 and $40 in offering costs, respectively	90	196		1,692
Net distributions to noncontrolling interests	(43)	(130)		(63)
Settlement of cross-currency swaps	(33)	0		0
Other	(90)	(43)		(21)
Net cash provided by financing activities	9,006	1,007		2,502
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(14)	7		(3)
Decrease in cash, cash equivalents and restricted cash	(118)	(61)		(25)
Cash, cash equivalents and restricted cash, January 1	364	425		450
Cash, cash equivalents and restricted cash, December 31	246	364		425
Cash and cash equivalents, January 1	288
Cash and cash equivalents, December 31	190	288
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized	812	619		532
Income tax payments (refunds), net	174	172		160
Noncash acquisition of businesses:
Assets acquired, net of cash, cash equivalents and restricted cash	9,921	436		3,808
Value of equity method investment immediately prior to acquisition	0	(28)		(1,144)
Liabilities assumed	(145)	(261)		(1,322)
Cash paid, net of cash, cash equivalents and restricted cash acquired	9,776	147		1,342
Other Noncash Investing and Financing Items [Abstract]
Accrued capital expenditures	459	562		626
Increase in capital lease obligations for investment in property, plant and equipment	558	504		0
Accrued Merger-related transaction costs	0	31		0
Equitization of note receivable due from unconsolidated affiliate	0	19		0
Common dividends issued in stock	54	53		53
San Diego Gas and Electric Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	676	421	[1]	565	[1]
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	688	670	[1]	646	[1]
Deferred income taxes and investment tax credits	39	(10)		258
Write-off of wildfire regulatory asset	0	351	[1]	0	[1]
Fixed-price contracts and other derivatives	(3)	(2)		(3)
Other	(14)	(22)		(35)
Changes in other noncurrent assets and liabilities, net	9	(30)		(9)
Changes in working capital components:
Accounts receivable	30	(76)		(31)
Due to/from affiliates, net	(2)	(10)		(19)
Inventories	3	(25)		(5)
Regulatory balancing accounts	138	56		35
Other current assets	(6)	9		25
Income taxes	23	136		(115)
Accounts payable	(1)	75		39
Other current liabilities	4	4		(28)
Net cash provided by operating activities	1,584	1,547		1,323
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(1,542)	(1,555)		(1,399)
Purchases of nuclear decommissioning trust assets	(890)	(1,314)		(1,034)
Proceeds from sales by nuclear decommissioning trusts	890	1,314		1,134
Decrease (increase) in loans to affiliate, net	0	31		(31)
Other	0	9		6
Net cash used in investing activities	(1,542)	(1,515)		(1,324)
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid	(250)	(450)		(175)
Issuances of debt (maturities greater than 90 days)	618	398		498
Payments on debt (maturities greater than 90 days)	(492)	(186)		(204)
(Decrease) increase in short-term debt, net	38	253		(114)
Net distributions to noncontrolling interests	57	(34)		(21)
Debt issuance costs	(5)	(4)		(6)
Net cash provided by financing activities	(34)	(23)		(22)
Increase (decrease) in cash, cash equivalents and restricted cash	8	9		(23)
Cash, cash equivalents and restricted cash, January 1	29	20		43
Cash, cash equivalents and restricted cash, December 31	37	29		20
Cash and cash equivalents, January 1	12
Cash and cash equivalents, December 31	8	12
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized	214	195		187
Income tax payments (refunds), net	112	27		137
Other Noncash Investing and Financing Items [Abstract]
Accrued capital expenditures	159	217		227
Increase in capital lease obligations for investment in property, plant and equipment	550	500		0
Southern California Gas Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	401	397	[1]	350	[1]
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	556	515	[1]	476	[1]
Deferred income taxes and investment tax credits	78	137		103
Impairment losses	0	0	[1]	22	[1]
Other	(7)	11		(26)
Insurance receivable for Aliso Canyon costs	(43)	188		(281)
Changes in other noncurrent assets and liabilities, net	(144)	(93)		42
Changes in working capital components:
Accounts receivable	(87)	72		37
Due to/from affiliates, net	(10)	7		6
Inventories	(2)	(66)		4
Regulatory balancing accounts	125	53		163
Other current assets	11	0		(13)
Income taxes	14	(5)		(2)
Accounts payable	71	39		36
Reserve for Aliso Canyon costs	56	31		(221)
Other current liabilities	(6)	20		(25)
Net cash provided by operating activities	1,013	1,306		671
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(1,538)	(1,367)		(1,319)
Decrease (increase) in loans to affiliate, net	0	0		50
Other	7	4		0
Net cash used in investing activities	(1,531)	(1,363)		(1,269)
CASH FLOWS FROM FINANCING ACTIVITIES
Common dividends paid	(50)	0		0
Preferred dividends paid	(1)	(1)		(1)
Issuances of debt (maturities greater than 90 days)	949	0		499
Payments on debt (maturities greater than 90 days)	(500)	0		(3)
(Decrease) increase in short-term debt, net	140	54		62
Debt issuance costs	(10)	0		(5)
Net cash provided by financing activities	528	53		552
Increase (decrease) in cash and cash equivalents	10	(4)		(46)
Cash and cash equivalents, January 1	8	12		58
Cash and cash equivalents, December 31	18	8		12
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest payments, net of amounts capitalized	105	97		92
Income tax payments (refunds), net	0	28		41
Other Noncash Investing and Financing Items [Abstract]
Accrued capital expenditures	191	208		207
Preferred Stock [Member]
Other Noncash Investing and Financing Items [Abstract]
Dividends declared but not paid	36	0		0
Common Stock [Member]
Other Noncash Investing and Financing Items [Abstract]
Dividends declared but not paid	245	207		189
Non-controlling interests [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	76	94		148
Other Noncash Investing and Financing Items [Abstract]
Dividends declared but not paid	8	7		7
Non-controlling interests [Member] | San Diego Gas and Electric Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 7	$ 14		$ (5)

[1] As adjusted for the retrospective adoption of ASU 2017-07, which we discuss in Note 2, and a reclassification to conform to current year presentation, which we discuss in Note 1.