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8.00% Series A Convertible Preferred Stock (Tables)
6 Months Ended
Jun. 30, 2019
Temporary Equity Disclosure [Abstract]  
Summary of Preferred Stock Activity
The following summarizes the preferred stock activity for the six months ended June 30, 2019 (in millions, except per share data):
 
 
Preferred Stock
 
 
Shares Issued and Outstanding
 
Carrying Value
Balance at December 31, 2018
 
246,233

 
$
208.4

Dividends paid/accrued dividends
 
9,947

 
10.1

Balance at June 30, 2019
 
256,180

 
$
218.5