Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Receivables, allowances for uncollectible accounts (in dollars)	$ 59	$ 62
Utility property, plant and equipment, accumulated depreciation (in dollars)	8,751	8,548
Nonutility property, plant and equipment, accumulated depreciation (in dollars)	$ 88	$ 85
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized	800,000,000	800,000,000
Common stock, shares issued	325,811,206	325,811,206
Common stock, shares outstanding	325,811,206	325,811,206
Southern California Edison
Receivables, allowances for uncollectible accounts (in dollars)	$ 59	$ 62
Utility property, plant and equipment, accumulated depreciation (in dollars)	8,751	8,548
Nonutility property, plant and equipment, accumulated depreciation (in dollars)	$ 83	$ 81
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized	560,000,000	560,000,000
Common stock, shares issued	434,888,104	434,888,104
Common stock, shares outstanding	434,888,104	434,888,104