Consolidated Statements of Shareholders' Deficit (Parenthetical) - $ / shares		3 Months Ended								12 Months Ended
	Feb. 28, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Dividends declared (in dollars per share)										$ 0.215	$ 0.215
Common Stock
Dividends declared (in dollars per share)			$ 0.215	$ 0.215	$ 0.215	$ 0.215	$ 0.215	$ 0.215	$ 0.215	$ 0.87	$ 0.86
Common stock dividends, percentage increase		5.00%
Common stock dividends, periodic payment (in dollars per share)	$ 0.225	$ 0.225