Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash Flows from Operating Activities
Net income	$ 750	$ 1,315
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and decommissioning	1,935	1,766
Allowance for equity funds used during construction	(80)	(72)
Deferred income taxes and tax credits, net	260	209
Disallowed capital expenditures	270	0
Other	247	258
Effect of changes in operating assets and liabilities:
Accounts receivable	(322)	(177)
Inventories	5	(43)
Accounts payable	95	(57)
Income taxes receivable/payable	42	397
Other current assets and liabilities	(87)	358
Regulatory assets, liabilities, and balancing accounts, net	78	(994)
Other noncurrent assets and liabilities	(251)	(3)
Net cash provided by operating activities	2,942	2,957
Cash Flows from Investing Activities
Capital expenditures	(3,662)	(3,564)
Decrease in restricted cash	11	2
Proceeds from sales and maturities of nuclear decommissioning trust investments	1,023	1,059
Purchases of nuclear decommissioning trust investments	(1,124)	(1,065)
Other	18	107
Net cash used in investing activities	(3,734)	(3,461)
Cash Flows from Financing Activities
Repayments under revolving credit facilities	0	(260)
Net issuances (repayments) of commercial paper, net of discount of $2 and $1 at respective dates	545	(789)
Proceeds from issuance of short-term debt, net of issuance costs	0	300
Short-term debt matured	(300)	0
Proceeds from issuance of long-term debt, net of premium, discount, and issuance costs of $14 and $6, at respective dates, for PG&E Corporation and $14 and $3, at respective dates, for the Utility	486	1,819
Repayments of long-term debt	0	(889)
Common stock issued	689	743
Common stock dividends paid	(638)	(617)
Other	13	40
Net cash provided by financing activities	795	347
Net change in cash and cash equivalents	3	(157)
Cash and cash equivalents at January 1	151	296
Cash and cash equivalents at September 30	154	139
Cash received (paid) for:
Interest, net of amounts capitalized	(569)	(516)
Income taxes, net	0	409
Supplemental disclosures of noncash investing and financing activities
Common stock dividends declared but not yet paid	223	216
Capital expenditures financed through accounts payable	245	232
Noncash common stock issuances	15	16
Terminated capital leases	0	71
Pacific Gas And Electric Company [Member]
Cash Flows from Operating Activities
Net income	715	1,271
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and decommissioning	1,935	1,765
Allowance for equity funds used during construction	(80)	(72)
Deferred income taxes and tax credits, net	245	173
Disallowed capital expenditures	270	0
Other	200	212
Effect of changes in operating assets and liabilities:
Accounts receivable	(321)	(174)
Inventories	5	(43)
Accounts payable	148	(3)
Income taxes receivable/payable	14	407
Other current assets and liabilities	(45)	366
Regulatory assets, liabilities, and balancing accounts, net	78	(994)
Other noncurrent assets and liabilities	(232)	6
Net cash provided by operating activities	2,932	2,914
Cash Flows from Investing Activities
Capital expenditures	(3,662)	(3,564)
Decrease in restricted cash	11	2
Proceeds from sales and maturities of nuclear decommissioning trust investments	1,023	1,059
Purchases of nuclear decommissioning trust investments	(1,124)	(1,065)
Other	18	22
Net cash used in investing activities	(3,734)	(3,546)
Cash Flows from Financing Activities
Net issuances (repayments) of commercial paper, net of discount of $2 and $1 at respective dates	545	(789)
Proceeds from issuance of short-term debt, net of issuance costs	0	300
Short-term debt matured	(300)	0
Proceeds from issuance of long-term debt, net of premium, discount, and issuance costs of $14 and $6, at respective dates, for PG&E Corporation and $14 and $3, at respective dates, for the Utility	486	1,472
Repayments of long-term debt	0	(539)
Preferred stock dividends paid	(10)	(10)
Common stock dividends paid	(537)	(537)
Equity contribution from PG&E Corporation	605	705
Other	20	50
Net cash provided by financing activities	809	652
Net change in cash and cash equivalents	7	20
Cash and cash equivalents at January 1	55	65
Cash and cash equivalents at September 30	62	85
Cash received (paid) for:
Interest, net of amounts capitalized	(561)	(500)
Income taxes, net	0	408
Supplemental disclosures of noncash investing and financing activities
Capital expenditures financed through accounts payable	245	232
Terminated capital leases	$ 0	$ 71