Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Receivables, allowances for uncollectible accounts	$ 55	$ 62
Utility property, plant and equipment, accumulated depreciation	9,321	9,000
Nonutility property, plant and equipment, accumulated depreciation	$ 102	$ 99
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 Company
Receivables, allowances for uncollectible accounts	$ 55	$ 61
Utility property, plant and equipment, accumulated depreciation	9,321	9,000
Nonutility property, plant and equipment, accumulated depreciation	$ 91	$ 89
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