Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Summary Of Significant Accounting Policies [Abstract]

Schedule Of Estimated Useful Lives And Balances Of Utility's Property, Plant And Equipment

	Estimated Useful	Balance at December 31,
(in millions, except estimated useful lives)	Lives (years)	2017		2016
Electricity generating facilities (1)	5 to 120	$	11,843		$	11,308
Electricity distribution facilities	15 to 65		31,110			29,836
Electricity transmission facilities	15 to 75		12,180			11,412
Natural gas distribution facilities	5 to 60		12,312			11,362
Natural gas transmission and storage facilities	5 to 62		7,329			6,491
Construction work in progress			2,471			2,184
Total property, plant, and equipment			77,245			72,593
Accumulated depreciation			(23,456)			(22,012)
Net property, plant, and equipment		$	53,789		$	50,581

(1) Balance includes nuclear fuel inventories.  Stored nuclear fuel inventory is stated at weighted-average cost.  Nuclear fuel in the reactor is expensed as used based on the amount of energy output.  (See Note 13 below.)

Schedule Of Changes In Asset Retirement Obligations

(in millions)		2017		2016
ARO liability at beginning of year	$	4,684	$	3,643
Revision in estimated cash flows		128		968
Accretion		207		194
Liabilities settled		(120)		(121)
ARO liability at end of year	$	4,899	$	4,684

Reclassification Out Of Accumulated Other Comprehensive Income TableText Block

The changes, net of income tax, in PG&E Corporation’s accumulated other comprehensive income (loss) for the year ended December 31, 2017 consisted of the following:

	Pension		Other
(in millions, net of income tax)	Benefits		Benefits		Total
Beginning balance	$	(25)	$	16	$	(9)
Other comprehensive income before reclassifications:
Unrecognized prior service cost
(net of taxes of $4 and $0, respectively)		(6)		-		(6)
Unrecognized net actuarial loss
(net of taxes of $229 and $97, respectively)		333		141		474
Regulatory account transfer
(net of taxes of $225 and $97, respectively)		(327)		(141)		(468)
Amounts reclassified from other comprehensive income:
Amortization of prior service cost
(net of taxes of $3 and $6, respectively) (1)		(4)		9		5
Amortization of net actuarial loss
(net of taxes of $9 and $2, respectively) (1)		13		2		15
Regulatory account transfer
(net of taxes of $6 and $8, respectively) (1)		(9)		(10)		(19)
Net current period other comprehensive loss		-		1		1
Ending balance	$	(25)	$	17	$	(8)

(1) These components are included in the computation of net periodic pension and other postretirement benefit costs.  (See Note 11 below for additional details.)

The changes, net of income tax, in PG&E Corporation’s accumulated other comprehensive income (loss) for the year ended December 31, 2016 consisted of the following:

	Pension		Other
(in millions, net of income tax)	Benefits		Benefits		Total
Beginning balance	$	(23)	$	16	$	(7)
Other comprehensive income before reclassifications:
Unrecognized prior service cost
(net of taxes of $37 and $15, respectively)		54		(21)		33
Unrecognized net actuarial loss
(net of taxes of $45 and $15, respectively)		(64)		21		(43)
Regulatory account transfer
(net of taxes of $5 and $0, respectively)		7		-		7
Amounts reclassified from other comprehensive income:
Amortization of prior service cost
(net of taxes of $3 and $6, respectively) (1)		5		9		14
Amortization of net actuarial loss
(net of taxes of $10 and $2, respectively) (1)		14		2		16
Regulatory account transfer
(net of taxes of $13 and $8, respectively) (1)		(18)		(11)		(29)
Net current period other comprehensive loss		(2)		-		(2)
Ending balance	$	(25)	$	16	$	(9)

(1) These components are included in the computation of net periodic pension and other postretirement benefit costs.  (See Note 11 below for additional details.)