Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Receivables, allowances for uncollectible accounts	$ 53	$ 54
Utility property, plant and equipment, accumulated depreciation	9,370	9,355
Nonutility property, plant and equipment, accumulated depreciation	$ 78	$ 114
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	$ 53	$ 53
Utility property, plant and equipment, accumulated depreciation	9,370	9,355
Nonutility property, plant and equipment, accumulated depreciation	$ 73	$ 97
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