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Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Common Stock, Shares Authorized	600,000,000	600,000,000
Common Stock, Shares, Outstanding	382,694,308	382,135,680
Preferred Stock, Shares Authorized	20,000,000	20,000,000
Preferred Stock, Shares Outstanding	440,000	440,000
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
At The Market Program
ATM Program Equity Remaining Available for Issuance	$ 200.7
Forward Agreement
Forward Contract Indexed to Issuer's Equity, Forward Rate Per Share	$ 500.0
Forward Contract Indexed to Issuer's Equity, Settlement Alternatives, Shares, at Fair Value	$ 434.4
Series A Preferred Stock
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears	$ 16.63
Preferred Stock, Amount of Preferred Dividends in Arrears	$ 6.7
Preferred Stock, Shares Outstanding	400,000
Series B Preferred Stock
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears		$ 72.23
Preferred Stock, Amount of Preferred Dividends in Arrears		$ 1.4
Preferred Stock, Shares Outstanding	20,000
Series B-1 Preferred Stock
Preferred Stock, Shares Outstanding	20,000

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