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Earnings Per Share (Reconciliation Of PG&E Corporation's Income Available For Common Shareholders And Weighted Average Shares Of Common Stock Outstanding For Calculating Diluted EPS) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Earnings Per Share [Abstract]      
Weighted average common shares outstanding, basic 468us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 444us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 424us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Add Incremental Shares From Assumed conversions:      
Employee share-based compensation 2us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements 1us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements 1us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Weighted average common shares outstanding, diluted 470us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 445us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 425us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Total earnings per common share, diluted $ 3.06us-gaap_EarningsPerShareDiluted $ 1.83us-gaap_EarningsPerShareDiluted $ 1.92us-gaap_EarningsPerShareDiluted