SAN ONOFRE NUCLEAR GENERATING STATION (SONGS) (Tables)

9 Months Ended

Sep. 30, 2016

Public Utilities, General Disclosures [Abstract]

Schedule of Nuclear Decommissioning Trusts Investments

The following table shows the fair values and gross unrealized gains and losses for the securities held in the NDT. We provide additional fair value disclosures for the NDT in Note 8.

NUCLEAR DECOMMISSIONING TRUSTS
(Dollars in millions)
	Cost		Gross unrealized gains		Gross unrealized losses			Estimated fair value
At September 30, 2016:
Debt securities:
Debt securities issued by the U.S. Treasury and other
U.S. government corporations and agencies(1)	$	95	$	5	$	—		$	100
Municipal bonds(2)	150		11		—			161
Other securities(2)	183		9		(4		)	188
Total debt securities	428		25		(4		)	449
Equity securities	188		422		(3		)	607
Cash and cash equivalents	12		—		—			12
Total	$	628	$	447	$	(7	)	$	1,068
At December 31, 2015:
Debt securities:
Debt securities issued by the U.S. Treasury and other
U.S. government corporations and agencies	$	89	$	2	$	—		$	91
Municipal bonds	148		8		—			156
Other securities	194		1		(13		)	182
Total debt securities	431		11		(13		)	429
Equity securities	214		412		(7		)	619
Cash and cash equivalents	15		—		—			15
Total	$	660	$	423	$	(20	)	$	1,063

(1) Maturity dates are 2017-2065.

(2) Maturity dates are 2016-2115.

Schedule of Sales of Securities By Nuclear Decommissioning Trusts

The following table shows the proceeds from sales of securities in the NDT and gross realized gains and losses on those sales:

SALES OF SECURITIES
(Dollars in millions)
	Three months ended September 30,						Nine months ended September 30,
	2016			2015			2016			2015
Proceeds from sales(1)	$	282		$	210		$	486		$	431
Gross realized gains	24			18			32			24
Gross realized losses	(3		)	(6		)	(14		)	(13		)

(1) Excludes securities that are held to maturity.