CONDENSED STATEMENTS OF CONSOLIDATED CHANGES IN EQUITY (Parenthetical) - $ / shares	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Cumulative preferred stock par value (in dollars per share)	$ 0.01		$ 0.01
Cumulative preferred stock shares authorized (in shares)	20,000,000		20,000,000
Common stock shares par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock shares authorized (in shares)	1,000,000,000	1,000,000,000	1,000,000,000