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Subsequent Events (Details) - Subsequent Event - USD ($)
$ / shares in Units, $ in Millions
Apr. 26, 2018
Apr. 23, 2018
Apr. 19, 2018
Apr. 12, 2018
Subsequent Event        
Stockholders' Equity Note, Stock Split       3022259.23
Common stock dividend declared (usd per share)   $ 0.0645    
Common stock dividend declared, prorated quarterly (usd per share)   0.085    
Common stock dividend declared, annualized (usd per share)   $ 0.34    
IPO        
Subsequent Event        
Percentage of ownership sold in transaction   11.60%    
Legal fees   $ 3.2    
Common Stock        
Subsequent Event        
Shares issued (shares) 3,097,525      
Shares issued (usd per share) $ 15      
Common Stock | IPO        
Subsequent Event        
Shares issued in IPO (shares) 38,097,525 35,000,000    
Sale price (usd per share)   $ 15    
Brookfield        
Subsequent Event        
Dividends, Cash     $ 160.0  
Potential distribution of cash savings   85.00%    
Ownership interest threshold   25.00%    
Potential percentage of voting interest   37.50%    
Brookfield | LIBOR        
Subsequent Event        
Margin spread on variable interest rate   1.00%    
Brookfield | Brookfield Promissory Note        
Subsequent Event        
Dividends payable     $ 750.0  
Brookfield | Brookfield Promissory Note | LIBO        
Subsequent Event        
Margin spread on variable interest rate     4.50%  
Brookfield | Brookfield Promissory Note | LIBO | Third Anniversary        
Subsequent Event        
Margin spread on variable interest rate     2.00%  
Maximum | Brookfield        
Subsequent Event        
Leverage ratio     175.00%  
Maximum | Brookfield | Brookfield Promissory Note        
Subsequent Event        
Leverage ratio     175.00%