Commitments and Contingent Liabilities (Tables)

9 Months Ended

Sep. 30, 2017

Power [Member]

Loss Contingencies [Line Items]

Face Value Of Outstanding Guarantees, Current Exposure And Margin Positions

The following table shows the face value of Power’s outstanding guarantees, current exposure and margin positions as of September 30, 2017 and December 31, 2016.

	As of			As of
	September 30, 2017			December 31, 2016
	Millions
Face Value of Outstanding Guarantees	$	1,846		$	1,806
Exposure under Current Guarantees	$	108		$	139
Letters of Credit Margin Posted	$	134		$	157
Letters of Credit Margin Received	$	59		$	99
Cash Deposited and Received:
Counterparty Cash Margin Deposited	$	—		$	—
Counterparty Cash Margin Received	$	(2	)	$	(1	)
Net Broker Balance Deposited (Received)	$	(6	)	$	57
Additional Amounts Posted:
Other Letters of Credit	$	61		$	51

Total Minimum Purchase Commitments

As of September 30, 2017, the total minimum purchase requirements included in these commitments were as follows:

Fuel Type	Power's Share of Commitments through 2021
	Millions
Nuclear Fuel
Uranium	$	257
Enrichment	$	328
Fabrication	$	178
Natural Gas	$	963
Coal	$	308

PSE And G [Member]

Loss Contingencies [Line Items]

Contract For Anticipated BGS-Fixed Price Eligible Load

	Auction Year
	2014	2015	2016	2017
36-Month Terms Ending	May 2017	May 2018	May 2019	May 2020	(A)
Load (MW)	2,800	2,900	2,800	2,800
$ per MWh	$97.39	$99.54	$96.38	$90.78

(A) Prices set in the 2017 BGS auction year became effective on June 1, 2017 when the 2014 BGS auction agreements expired.