Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current Assets
Cash and cash equivalents	$ 108	$ 296
Restricted cash	299	301
Accounts receivable
Customers (net of allowance for doubtful accounts of $76 and $80 at respective dates)	877	1,091
Accrued unbilled revenue	638	766
Regulatory balancing accounts	1,707	1,124
Other	323	312
Regulatory assets	418	448
Inventories
Gas stored underground and fuel oil	78	137
Materials and supplies	314	317
Income taxes receivable	602	574
Other	528	611
Total current assets	5,892	5,977
Property, Plant, and Equipment
Electric	43,402	42,881
Gas	14,734	14,379
Construction work in progress	1,888	1,834
Other	2	2
Total property, plant, and equipment	60,026	59,096
Accumulated depreciation	(18,209)	(17,844)
Net property, plant, and equipment	41,817	41,252
Other Noncurrent Assets
Regulatory assets	4,823	4,913
Nuclear decommissioning trusts	2,351	2,342
Income taxes receivable	87	85
Other	1,017	1,036
Total other noncurrent assets	8,278	8,376
TOTAL ASSETS	55,987	55,605
Current Liabilities
Short-term borrowings	930	1,174
Long-term debt, classified as current	0	889
Accounts payable
Trade creditors	1,072	1,293
Disputed claims and customer refunds	154	154
Regulatory balancing accounts	1,031	1,008
Other	572	471
Interest payable	862	892
Other	1,526	1,612
Total current liabilities	6,147	7,493
Noncurrent Liabilities
Long-term debt	13,965	12,717
Regulatory liabilities	5,804	5,660
Pension and other postretirement benefits	1,592	1,601
Asset retirement obligations	3,540	3,539
Deferred income taxes	7,838	7,823
Other	2,169	2,178
Total noncurrent liabilities	34,908	33,518
Commitments and Contingencies (Note 10)
Shareholders' Equity
Common stock	9,869	9,550
Reinvested earnings	4,756	4,742
Accumulated other comprehensive income	55	50
Total shareholders' equity	14,680	14,342
Noncontrolling Interest - Preferred Stock of Subsidiary	252	252
Total equity	14,932	14,594
TOTAL LIABILITIES AND EQUITY	55,987	55,605
Pacific Gas And Electric Company [Member]
Current Assets
Cash and cash equivalents	68	65
Restricted cash	299	301
Accounts receivable
Customers (net of allowance for doubtful accounts of $76 and $80 at respective dates)	877	1,091
Accrued unbilled revenue	638	766
Regulatory balancing accounts	1,707	1,124
Other	333	313
Regulatory assets	418	448
Inventories
Gas stored underground and fuel oil	78	137
Materials and supplies	314	317
Income taxes receivable	588	563
Other	363	523
Total current assets	5,683	5,648
Property, Plant, and Equipment
Electric	43,402	42,881
Gas	14,734	14,379
Construction work in progress	1,888	1,834
Total property, plant, and equipment	60,024	59,094
Accumulated depreciation	(18,208)	(17,843)
Net property, plant, and equipment	41,816	41,251
Other Noncurrent Assets
Regulatory assets	4,823	4,913
Nuclear decommissioning trusts	2,351	2,342
Income taxes receivable	82	81
Other	831	814
Total other noncurrent assets	8,087	8,150
TOTAL ASSETS	55,586	55,049
Current Liabilities
Short-term borrowings	882	914
Long-term debt, classified as current	0	539
Accounts payable
Trade creditors	1,072	1,293
Disputed claims and customer refunds	154	154
Regulatory balancing accounts	1,031	1,008
Other	555	432
Interest payable	861	887
Other	1,272	1,382
Total current liabilities	5,827	6,609
Noncurrent Liabilities
Long-term debt	13,616	12,717
Regulatory liabilities	5,804	5,660
Pension and other postretirement benefits	1,520	1,530
Asset retirement obligations	3,540	3,539
Deferred income taxes	8,023	8,042
Other	2,124	2,111
Total noncurrent liabilities	34,627	33,599
Commitments and Contingencies (Note 10)
Shareholders' Equity
Preferred stock	258	258
Common stock	1,322	1,322
Additional paid-in capital	6,066	5,821
Reinvested earnings	7,473	7,427
Accumulated other comprehensive income	13	13
Total shareholders' equity	15,132	14,841
TOTAL LIABILITIES AND EQUITY	$ 55,586	$ 55,049