Employee Benefit Plans (Reconciliation Of Changes In Plan Assets Benefit Obligations And Funded Status) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liability		$ (2,622)		$ (2,561)
Decrease in other comprehensive income		1		14	$ (113)
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at January 1		2,092		1,892
Actual return on plan assets		(26)		241
Company contributions		61		57
Plan participant contribution		68		63
Benefits and expenses paid		(160)		(161)
Fair value of plan assets at December 31		2,035		2,092	1,892
Projected benefit obligation at January 1		1,811		1,597
Service cost for benefits earned		55		45
Interest cost		71		76	74
Actuarial (gain) loss		(98)		166
Benefits and expenses paid		(146)		(140)
Federal subsidy on benefits paid		4		4
Projected benefit obligation at December 31		1,766		1,811	1,597
Current liability	[1]	(75)		(87)
Net assets (liabilities) at end of year		269		281
Noncurrent asset	[1]	344		368
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at January 1		14,216		12,527
Actual return on plan assets		(176)		1,946
Company contributions		334		332
Benefits and expenses paid		(629)		(589)
Fair value of plan assets at December 31		13,745		14,216	12,527
Projected benefit obligation at January 1		16,696		14,077
Service cost for benefits earned		479		383
Interest cost		673		695	627
Actuarial (gain) loss		(922)		2,131
Plan amendments		1		(1)
Transitional costs		1
Benefits and expenses paid		(629)		(589)
Projected benefit obligation at December 31		16,299	[2]	16,696	$ 14,077
Current liability		(6)		(6)
Noncurrent liability		(2,547)		(2,474)
Net assets (liabilities) at end of year		$ (2,553)		$ (2,480)

[1] At December 31, 2015 and 2014, the postretirement medical plan was in an overfunded position and the postretirement life insurance plan was in an underfunded position.

[2] PG&E Corporation's accumulated benefit obligation was $14.7 billion and $14.9 billion at December 31, 2015 and 2014, respectively.