Investments (Tables) - Southern California Edison

3 Months Ended

Mar. 31, 2017

Investment [Line Items]

Amortized Cost and Fair Value of the Trust Investments

The following table sets forth amortized cost and fair value of the trust investments (see Note 4 for a discussion of fair value of the trust investments):

	Longest Maturity Dates	Amortized Cost				Fair Value
(in millions)		March 31, 2017		December 31, 2016		March 31, 2017		December 31, 2016
Stocks	—	$	291	$	319	$	1,537	$	1,547
Municipal bonds	2054	645		659		753		766
U.S. government and agency securities	2055	1,308		1,131		1,380		1,191
Corporate bonds	2057	552		600		608		659
Short-term investments and receivables/payables1	One-year	71		75		74		79
Total		$	2,867	$	2,784	$	4,352	$	4,242

¹ Short-term investments include $36 million and $114 million of repurchase agreements payable by financial institutions which earn interest, are fully secured by U.S. Treasury securities and mature by April 3, 2017 and January 4, 2017 as of March 31, 2017 and December 31, 2016, respectively.

Summary of Changes in the Fair Value of Trust

The following table sets forth a summary of changes in the fair value of the trust:

	Three months ended March 31,
(in millions)	2017			2016
Balance at beginning of period	$	4,242		$	4,331
Gross realized gains	99			17
Gross realized losses	(16		)	(3		)
Unrealized gains, net of losses	27			59
Other-than-temporary impairments	(1		)	(7		)
Interest and dividends	28			29
Income taxes	—			(18		)
Decommissioning disbursements	(26		)	(116		)
Administrative expenses and other	(1		)	(2		)
Balance at end of period	$	4,352		$	4,290