Equity - Reincorporation, Common Stock (Details)	1 Months Ended					12 Months Ended
	Feb. 29, 2020 $ / shares	Feb. 28, 2019 $ / shares	Feb. 28, 2018 $ / shares	Feb. 28, 2017 $ / shares	Jul. 31, 2016 $ / shares	Dec. 31, 2019 item $ / shares	Dec. 31, 2018 $ / shares	Dec. 31, 2017 $ / shares
Common Stock
The number of consecutive years the company has paid regular common stock quarterly dividends.						60
Votes per share of common stock						1
Common stock quarterly dividend per share (in dollars per share) | $ / shares	$ 0.625	$ 0.55	$ 0.50	$ 0.45	$ 0.425	$ 2.20	$ 2.00	$ 1.80