Shareholders' Equity / Partners' Capital - At the Market Common Share Offering Program (Details) - At the Market - Common Share Offering Program - Class A common shares/units	Mar. 31, 2020 USD ($)
Class of Stock [Line Items]
Shares authorized for future issuance, value	$ 500,000,000.0
Shares available for future issuance, value	$ 500,000,000.0