Condensed Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash Flows from Operating Activities
Net income	$ 34	$ 230
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and decommissioning	631	538
Allowance for equity funds used during construction	(28)	(22)
Deferred income taxes and tax credits, net	113	15
Disallowed capital expenditures	53.0	0
Other	52	56
Effect of changes in operating assets and liabilities:
Accounts receivable	236	321
Inventories	58	62
Accounts payable	(46)	31
Income taxes receivable/payable	3	(28)
Other current assets and liabilities	(114)	(37)
Regulatory assets, liabilities, and balancing accounts, net	195	(376)
Other noncurrent assets and liabilities	(107)	(19)
Net cash provided by operating activities	1,080	771
Cash Flows from Investing Activities
Capital expenditures	(1,191)	(1,197)
Proceeds from sales and maturities of nuclear decommissioning trust investments	417	530
Purchases of nuclear decommissioning trust investments	(505)	(536)
Other	7	14
Net cash used in investing activities	(1,272)	(1,189)
Cash Flows from Financing Activities
Repayments under revolving credit facilities	0	(260)
Net issuances (repayments) of commercial paper, net of discount of $0 and $1 at respective dates	223	15
Proceeds from issuance of long-term debt, net of premium, discount, and issuance costs of $13 for PG&E Corporation and $10 for the Utility in 2014	0	1,237
Repayments of long-term debt	0	(889)
Common stock issued	151	302
Common stock dividends paid	(211)	(202)
Other	23	27
Net cash provided by financing activities	186	230
Net change in cash and cash equivalents	(6)	(188)
Cash and cash equivalents at January 1	151	296
Cash and cash equivalents at March 31	145	108
Cash received (paid) for:
Interest, net of amounts capitalized	(216)	(199)
Income taxes, net	0	1
Supplemental disclosures of noncash investing and financing activities
Common stock dividends declared but not yet paid	218	213
Capital expenditures financed through accounts payable	217	171
Noncash common stock issuances	5	5
Pacific Gas And Electric Company [Member]
Cash Flows from Operating Activities
Net income	4	228
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and decommissioning	631	538
Allowance for equity funds used during construction	(28)	(22)
Deferred income taxes and tax credits, net	112	(19)
Disallowed capital expenditures	53.0	0
Other	45	39
Effect of changes in operating assets and liabilities:
Accounts receivable	215	312
Inventories	58	62
Accounts payable	26	53
Income taxes receivable/payable	2	(25)
Other current assets and liabilities	(123)	26
Regulatory assets, liabilities, and balancing accounts, net	195	(376)
Other noncurrent assets and liabilities	(89)	(37)
Net cash provided by operating activities	1,101	779
Cash Flows from Investing Activities
Capital expenditures	(1,191)	(1,197)
Proceeds from sales and maturities of nuclear decommissioning trust investments	417	530
Purchases of nuclear decommissioning trust investments	(505)	(536)
Other	7	11
Net cash used in investing activities	(1,272)	(1,192)
Cash Flows from Financing Activities
Net issuances (repayments) of commercial paper, net of discount of $0 and $1 at respective dates	223	(33)
Proceeds from issuance of long-term debt, net of premium, discount, and issuance costs of $13 for PG&E Corporation and $10 for the Utility in 2014	0	890
Repayments of long-term debt	0	(539)
Preferred stock dividends paid	(3)	(3)
Common stock dividends paid	(179)	(179)
Equity contribution from PG&E Corporation	100	250
Other	25	30
Net cash provided by financing activities	166	416
Net change in cash and cash equivalents	(5)	3
Cash and cash equivalents at January 1	55	65
Cash and cash equivalents at March 31	50	68
Cash received (paid) for:
Interest, net of amounts capitalized	(211)	(188)
Income taxes, net	0	1
Supplemental disclosures of noncash investing and financing activities
Capital expenditures financed through accounts payable	$ 217	$ 171