CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Common stock dividends declared (USD per share)	$ 3.58	$ 3.29	$ 3.02
Preferred Class A [Member]
Preferred stock, dividends declared per share (USD per share)	6.10
Preferred Class B [Member]
Preferred stock, dividends declared per share (USD per share)	3.41
Southern California Gas Company [Member]
Common stock dividends declared (USD per share)	1.50	1.50	1.50
Preferred stock, dividends declared per share (USD per share)	0.55
San Diego Gas and Electric Company [Member]
Common stock dividends declared (USD per share)	$ 2.14	$ 3.86	$ 1.50