Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Current Assets
Cash and cash equivalents	$ 164	$ 177
Restricted cash	7	7
Accounts receivable
Customers (net of allowance for doubtful accounts of $59 and $58 at respective dates)	1,197	1,252
Accrued unbilled revenue	773	1,098
Regulatory balancing accounts	1,655	1,500
Other	799	801
Regulatory assets	486	423
Inventories
Gas stored underground and fuel oil	96	117
Materials and supplies	369	346
Income taxes receivable	160	160
Other	274	283
Total current assets	5,980	6,164
Property, Plant, and Equipment
Electric	53,074	52,556
Gas	18,045	17,853
Construction work in progress	2,446	2,184
Other	2	2
Total property, plant, and equipment	73,567	72,595
Accumulated depreciation	(22,487)	(22,014)
Net property, plant, and equipment	51,080	50,581
Other Noncurrent Assets
Regulatory assets	8,089	7,951
Nuclear decommissioning trusts	2,701	2,606
Income taxes receivable	70	70
Other	1,244	1,226
Total other noncurrent assets	12,104	11,853
TOTAL ASSETS	69,164	68,598
Current Liabilities
Short-term borrowings	763	1,516
Long-term debt, classified as current	700	700
Accounts payable
Trade creditors	1,117	1,495
Regulatory balancing accounts	908	645
Other	632	433
Disputed claims and customer refunds	236	236
Interest payable	168	216
Other	2,014	2,323
Total current liabilities	6,538	7,564
Noncurrent Liabilities
Long-term debt	16,813	16,220
Regulatory liabilities	6,991	6,805
Pension and other postretirement benefits	2,666	2,641
Asset retirement obligations	4,716	4,684
Deferred income taxes	10,488	10,213
Other	2,347	2,279
Total noncurrent liabilities	44,021	42,842
Commitments and Contingencies (Note 9)
Shareholders' Equity
Common stock	12,292	12,198
Reinvested earnings	6,070	5,751
Accumulated other comprehensive income (loss)	(9)	(9)
Total shareholders' equity	18,353	17,940
Noncontrolling Interest - Preferred Stock of Subsidiary	252	252
Total equity	18,605	18,192
TOTAL LIABILITIES AND EQUITY	69,164	68,598
Pacific Gas And Electric Company [Member]
Current Assets
Cash and cash equivalents	60	71
Restricted cash	7	7
Accounts receivable
Customers (net of allowance for doubtful accounts of $59 and $58 at respective dates)	1,197	1,252
Accrued unbilled revenue	773	1,098
Regulatory balancing accounts	1,655	1,500
Other	850	801
Regulatory assets	486	423
Inventories
Gas stored underground and fuel oil	96	117
Materials and supplies	369	346
Income taxes receivable	159	159
Other	274	282
Total current assets	5,926	6,056
Property, Plant, and Equipment
Electric	53,074	52,556
Gas	18,045	17,853
Construction work in progress	2,446	2,184
Total property, plant, and equipment	73,565	72,593
Accumulated depreciation	(22,485)	(22,012)
Net property, plant, and equipment	51,080	50,581
Other Noncurrent Assets
Regulatory assets	8,089	7,951
Nuclear decommissioning trusts	2,701	2,606
Income taxes receivable	70	70
Other	1,125	1,110
Total other noncurrent assets	11,985	11,737
TOTAL ASSETS	68,991	68,374
Current Liabilities
Short-term borrowings	763	1,516
Long-term debt, classified as current	700	700
Accounts payable
Trade creditors	1,117	1,494
Regulatory balancing accounts	908	645
Other	661	453
Disputed claims and customer refunds	236	236
Interest payable	167	214
Other	1,774	2,072
Total current liabilities	6,326	7,330
Noncurrent Liabilities
Long-term debt	16,464	15,872
Regulatory liabilities	6,991	6,805
Pension and other postretirement benefits	2,572	2,548
Asset retirement obligations	4,716	4,684
Deferred income taxes	10,793	10,510
Other	2,286	2,230
Total noncurrent liabilities	43,822	42,649
Commitments and Contingencies (Note 9)
Shareholders' Equity
Preferred stock	258	258
Common stock	1,322	1,322
Additional paid-in capital	8,175	8,050
Reinvested earnings	9,085	8,763
Accumulated other comprehensive income (loss)	3	2
Total shareholders' equity	18,843	18,395
TOTAL LIABILITIES AND EQUITY	$ 68,991	$ 68,374