Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Operating Activities
Net income	$ 1,450	$ 828	$ 830
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and decommissioning	2,433	2,077	2,272
Allowance for equity funds used during construction	(100)	(101)	(107)
Deferred income taxes and tax credits, net	690	1,075	648
PSEP disallowed capital expenditures	116	196	353
Other	286	355	290
Effect of changes in operating assets and liabilities:
Accounts receivable	13	(152)	(40)
Inventories	(22)	(10)	(24)
Accounts payable	(61)	113	(4)
Income taxes receivable/payable	376	(363)	(132)
Other current assets and liabilities	205	(469)	262
Regulatory assets, liabilities, and balancing accounts, net	(1,642)	(202)	291
Other noncurrent assets and liabilities	(67)	80	243
Net cash provided by operating activities	3,677	3,427	4,882
Cash Flows from Investing Activities
Capital expenditures	(4,833)	(5,207)	(4,624)
Decrease in restricted cash	3	29	50
Proceeds from sales and maturities of nuclear decommissioning trust investments	1,336	1,619	1,133
Purchases of nuclear decommissioning trust investments	(1,334)	(1,604)	(1,189)
Other	114	56	104
Net cash provided by (used in) investing activities	(4,714)	(5,107)	(4,526)
Cash Flows from Financing Activities
Borrowings under revolving credit facilities	0	140	120
Repayments under revolving credit facilities	(260)	0	0
Net issuances (repayments) of commercial paper, net of discount of $2, $2, and $3 at respective dates	(583)	542	(1,021)
Proceeds from issuance of short-term debt	300	0	0
Proceeds from issuance of long-term debt, net of premium, discount, and issuance costs of (for PG&E Corporaiton $17, $18, and $13 and for the Utility $14, $18, and $13, at respective dates)	2,308	1,532	1,137
Short-term debt matured	0	0	(250)
Repayments of long-term debt	(889)	(861)	(50)
Energy recovery bonds matured	0	0	(423)
Common stock issued	802	1,045	751
Common stock dividends paid	(828)	(782)	(746)
Other	42	(41)	14
Net cash provided by (used in) financing activities	892	1,575	(468)
Net change in cash and cash equivalents	(145)	(105)	(112)
Cash and cash equivalents at January 1	296	401	513
Cash and cash equivalents at December 31	151	296	401
Cash received (paid) for:
Interest, net of amounts capitalized	(633)	(623)	(594)
Income taxes, net	501	(41)	114
Supplemental disclosures of noncash investing and financing activities
Common stock dividends declared but not yet paid	217	(208)	(196)
Capital expenditures financed through accounts payable	339	(322)	(362)
Noncash common stock issuances	21	22	22
Terminated Capital Leases	71	0	136
Pacific Gas And Electric Company [Member]
Cash Flows from Operating Activities
Net income	1,433	866	811
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and decommissioning	2,432	2,077	2,272
Allowance for equity funds used during construction	(100)	(101)	(107)
Deferred income taxes and tax credits, net	731	1,103	684
PSEP disallowed capital expenditures	116	196	353
Other	226	299	236
Effect of changes in operating assets and liabilities:
Accounts receivable	16	(152)	(40)
Inventories	(22)	(10)	(24)
Accounts payable	(55)	99	(26)
Income taxes receivable/payable	395	(377)	(50)
Other current assets and liabilities	155	(404)	272
Regulatory assets, liabilities, and balancing accounts, net	(1,642)	(202)	291
Other noncurrent assets and liabilities	(66)	22	256
Net cash provided by operating activities	3,619	3,416	4,928
Cash Flows from Investing Activities
Capital expenditures	(4,833)	(5,207)	(4,624)
Decrease in restricted cash	3	29	50
Proceeds from sales and maturities of nuclear decommissioning trust investments	1,336	1,619	1,133
Purchases of nuclear decommissioning trust investments	(1,334)	(1,604)	(1,189)
Other	29	21	16
Net cash provided by (used in) investing activities	(4,799)	(5,142)	(4,614)
Cash Flows from Financing Activities
Net issuances (repayments) of commercial paper, net of discount of $2, $2, and $3 at respective dates	(583)	542	(1,021)
Proceeds from issuance of short-term debt	300	0	0
Proceeds from issuance of long-term debt, net of premium, discount, and issuance costs of (for PG&E Corporaiton $17, $18, and $13 and for the Utility $14, $18, and $13, at respective dates)	1,961	1,532	1,137
Short-term debt matured	0	0	(250)
Repayments of long-term debt	(539)	(861)	(50)
Energy recovery bonds matured	0	0	(423)
Preferred stock dividends paid	(14)	(14)	(14)
Common stock dividends paid	(716)	(716)	(716)
Equity contribution	705	1,140	885
Other	56	(26)	28
Net cash provided by (used in) financing activities	1,170	1,597	(424)
Net change in cash and cash equivalents	(10)	(129)	(110)
Cash and cash equivalents at January 1	65	194	304
Cash and cash equivalents at December 31	55	65	194
Cash received (paid) for:
Interest, net of amounts capitalized	(618)	(600)	(574)
Income taxes, net	500	(62)	174
Supplemental disclosures of noncash investing and financing activities
Capital expenditures financed through accounts payable	339	322	362
Terminated Capital Leases	$ 71	$ 0	$ 136