Preferred and Preference Stock of Utility (Details) - Southern California Edison $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($) $ / shares shares
Series K Preferred Stock
Preferred and Preference Stock of Utility
Preferred stock issued	$ 300
Preference stock dividend rate (percent)	5.45%
Shares issued (in shares) | shares	120,004
Liquidation value (in dollars per share) | $ / shares	$ 2,500
Series D Preferred Stock
Preferred and Preference Stock of Utility
Redemption of preference stock	$ 125