Shareholders' Equity / Partners' Capital - Share Repurchase (Details)	Mar. 31, 2020 USD ($)
Class A common shares/units
Class of Stock [Line Items]
Repurchase of shares, authorized amount	$ 300,000,000.0
Remaining repurchase authorization	265,100,000
Preferred Shares/Units
Class of Stock [Line Items]
Repurchase of shares, authorized amount	250,000,000.0
Remaining repurchase authorization	$ 250,000,000.0