CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares								3 Months Ended		6 Months Ended
	Jun. 15, 2020	Mar. 11, 2020	Dec. 11, 2019	Sep. 10, 2019	Jun. 11, 2019	Mar. 12, 2019	Dec. 12, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Stockholders' Equity
Dividends declared per share of common stock	$ 0.25	$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 0.25	$ 0.40	$ 0.65	$ 0.80