Income per Common Share of the Trust Equity Offering (Details) - Common shares $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended
	Sep. 30, 2019 USD ($) $ / shares shares
Class of Shares [Line Items]
Shares, Issued | shares	9.2
Shares Issued, Price Per Share | $ / shares	$ 50.50
Proceeds from Issuance of Shares | $	$ 447.9