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Equity Schedule of Stock by Class - Preferred (Details) - USD ($) $ / shares in Units, $ in Millions |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Jun. 11, 2018 | Dec. 31, 2018 | Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred Stock, Shares Outstanding |  |  |  | 440,000 |  |  |  | 440,000
Shares outstanding |  | $ 5,750.9 |  | $ 5,741.4 |  | $ 5,779.6 |  | $ 5,986.7
Series A Preferred Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred Stock, Liquidation Preference Per Share |  |  |  | $ 1,000.00 |  |  |  |
Preferred Stock, Shares Outstanding |  |  |  | 400,000 |  |  |  |
Dividends Declared Per Share |  |  |  | $ 28.25 |  | $ 28.25 |  |
Series B Preferred Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred Stock, Liquidation Preference Per Share |  |  |  | $ 25,000.00 |  |  |  |
Preferred Stock, Shares Outstanding |  |  |  | 20,000 |  |  |  |
Dividends Declared Per Share |  |  |  | $ 812.50 |  | $ 862.15 |  |
Series B-1 Preferred Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred Stock, Shares Outstanding |  |  |  | 20,000 |  |  |  |
Preferred Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Shares outstanding |  | 880.0 | [1] | $ 880.0 | [1] | $ 880.0 | [1] | 880.0
Preferred Stock | Series A Preferred Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Issuance of preferred stock, net of issuance costs | $ 393.9 |  |  |  |  |  |  |
Shares outstanding |  |  |  |  |  |  |  | 393.9
Preferred Stock | Series B Preferred Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Shares outstanding |  |  |  |  |  |  |  | $ 486.1
Net Proceeds [Member] | Preferred Stock | Series B Preferred Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Issuance of preferred stock, net of issuance costs |  | $ 486.1 |  |  |  |  |  |
[1] | Series A and Series B shares have an aggregate liquidation preference of $400M and $500M, respectively. See Note 5, "Equity" for additional information.

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