Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash Flows from Operating Activities
Net income	$ 320	$ 440
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and decommissioning	1,396	1,282
Allowance for equity funds used during construction	(54)	(53)
Deferred income taxes and tax credits, net	350	219
Disallowed capital expenditures	425	128
Other	179	149
Effect of changes in operating assets and liabilities:
Accounts receivable	(338)	(241)
Inventories	(30)	20
Accounts payable	179	78
Income taxes receivable/payable	(79)	6
Other current assets and liabilities	308	77
Regulatory assets, liabilities, and balancing accounts, net	(769)	(62)
Other noncurrent assets and liabilities	(106)	(184)
Net cash provided by operating activities	1,781	1,859
Cash Flows from Investing Activities
Capital expenditures	(2,651)	(2,410)
Proceeds from sales and maturities of nuclear decommissioning trust investments	721	779
Purchases of nuclear decommissioning trust investments	(762)	(879)
Other	6	24
Net cash used in investing activities	(2,686)	(2,486)
Cash Flows from Financing Activities
Net issuances (repayments) of commercial paper, net of discount of $3 and $2 at respective dates	257	681
Short-term debt financing	250	0
Short-term debt matured	0	(300)
Proceeds from issuance of long-term debt, net of discount and issuance costs of $6 and $14 at respective dates	594	486
Common stock issued	289	252
Common stock dividends paid	(440)	(424)
Other	21	30
Net cash provided by financing activities	971	725
Net change in cash and cash equivalents	66	98
Cash and cash equivalents at January 1	123	151
Cash and cash equivalents at June 30	189	249
Supplemental Cash Flow Information [Abstract]
Interest, net of amounts capitalized	(357)	(334)
Income taxes, net	54	0
Supplemental disclosures of noncash investing and financing activities
Common stock dividends declared but not yet paid	244	219
Capital expenditures financed through accounts payable	309	177
Noncash common stock issuances	10	10
Pacific Gas And Electric Company [Member]
Cash Flows from Operating Activities
Net income	317	410
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and decommissioning	1,396	1,282
Allowance for equity funds used during construction	(54)	(53)
Deferred income taxes and tax credits, net	352	219
Disallowed capital expenditures	425	128
Other	144	119
Effect of changes in operating assets and liabilities:
Accounts receivable	(339)	(242)
Inventories	(30)	20
Accounts payable	190	134
Income taxes receivable/payable	(78)	8
Other current assets and liabilities	310	67
Regulatory assets, liabilities, and balancing accounts, net	(769)	(62)
Other noncurrent assets and liabilities	(95)	(170)
Net cash provided by operating activities	1,769	1,860
Cash Flows from Investing Activities
Capital expenditures	(2,651)	(2,410)
Proceeds from sales and maturities of nuclear decommissioning trust investments	721	779
Purchases of nuclear decommissioning trust investments	(762)	(879)
Other	6	24
Net cash used in investing activities	(2,686)	(2,486)
Cash Flows from Financing Activities
Net issuances (repayments) of commercial paper, net of discount of $3 and $2 at respective dates	257	676
Short-term debt financing	250	0
Short-term debt matured	0	(300)
Proceeds from issuance of long-term debt, net of discount and issuance costs of $6 and $14 at respective dates	594	486
Preferred stock dividends paid	(7)	(7)
Common stock dividends paid	(423)	(358)
Equity contribution from PG&E Corporation	280	185
Other	27	37
Net cash provided by financing activities	978	719
Net change in cash and cash equivalents	61	93
Cash and cash equivalents at January 1	59	55
Cash and cash equivalents at June 30	120	148
Supplemental Cash Flow Information [Abstract]
Interest, net of amounts capitalized	(352)	(330)
Income taxes, net	54	0
Supplemental disclosures of noncash investing and financing activities
Capital expenditures financed through accounts payable	$ 309	$ 177