CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash Flows from Operating Activities
Net income	$ 445	$ 579
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and decommissioning	752	712
Allowance for equity funds used during construction	(32)	(19)
Deferred income taxes and tax credits, net	178	252
Other	30	8
Effect of changes in operating assets and liabilities:
Accounts receivable	120	373
Butte-related insurance receivable	197	(7)
Inventories	28	(2)
Accounts payable	24	(13)
Butte-related third-party claims	(118)	(44)
Other current assets and liabilities	(145)	(137)
Regulatory assets, liabilities, and balancing accounts, net	114	(176)
Other noncurrent assets and liabilities	(81)	48
Net cash provided by operating activities	1,512	1,574
Cash Flows from Investing Activities
Capital expenditures	(1,470)	(1,216)
Proceeds from sales and maturities of nuclear decommissioning trust investments	494	470
Purchases of nuclear decommissioning trust investments	(505)	(493)
Other	6	4
Net cash used in investing activities	(1,475)	(1,235)
Cash Flows from Financing Activities
Net issuances (repayments) of commercial paper, net of discount of $0 and $2 at respective dates	36	(755)
Short-term debt financing	250	250
Short-term debt matured	(250)	(250)
Proceeds from issuance of long-term debt, net of discount and issuance costs of $0 and $10 at respective dates	0	590
Long-term debt matured or repurchased	(400)	0
Common stock issued	35	146
Common stock dividends paid	0	(243)
Other	(13)	(90)
Net cash used in financing activities	(342)	(352)
Net change in cash and cash equivalents	(305)	(13)
Cash and cash equivalents at January 1	449	177
Cash and cash equivalents at March 31	144	164
Supplemental disclosures of cash flow information
Interest, net of amounts capitalized	(268)	(246)
Income taxes, net	0	1
Supplemental disclosures of noncash investing and financing activities
Common stock dividends declared but not yet paid	0	250
Capital expenditures financed through accounts payable	255	237
Noncash common stock issuances	0	4
Terminated capital leases	137	0
Pacific Gas & Electric Co
Cash Flows from Operating Activities
Net income	452	569
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and decommissioning	752	712
Allowance for equity funds used during construction	(32)	(19)
Deferred income taxes and tax credits, net	175	264
Other	(1)	57
Effect of changes in operating assets and liabilities:
Accounts receivable	112	322
Butte-related insurance receivable	197	(7)
Inventories	28	(2)
Accounts payable	55	(3)
Butte-related third-party claims	(118)	(44)
Other current assets and liabilities	(131)	(113)
Regulatory assets, liabilities, and balancing accounts, net	114	(176)
Other noncurrent assets and liabilities	(87)	38
Net cash provided by operating activities	1,516	1,598
Cash Flows from Investing Activities
Capital expenditures	(1,470)	(1,216)
Proceeds from sales and maturities of nuclear decommissioning trust investments	494	470
Purchases of nuclear decommissioning trust investments	(505)	(493)
Other	6	4
Net cash used in investing activities	(1,475)	(1,235)
Cash Flows from Financing Activities
Net issuances (repayments) of commercial paper, net of discount of $0 and $2 at respective dates	47	(755)
Short-term debt financing	250	250
Short-term debt matured	(250)	(250)
Proceeds from issuance of long-term debt, net of discount and issuance costs of $0 and $10 at respective dates	0	590
Long-term debt matured or repurchased	(400)	0
Preferred stock dividends paid	0	(3)
Common stock dividends paid	0	(244)
Equity contribution from PG&E Corporation	0	125
Other	(13)	(87)
Net cash used in financing activities	(366)	(374)
Net change in cash and cash equivalents	(325)	(11)
Cash and cash equivalents at January 1	447	71
Cash and cash equivalents at March 31	122	60
Supplemental disclosures of cash flow information
Interest, net of amounts capitalized	(259)	(242)
Supplemental disclosures of noncash investing and financing activities
Capital expenditures financed through accounts payable	255	237
Terminated capital leases	$ 137	$ 0