XML 34 R23.htm IDEA: XBRL DOCUMENT v3.19.2
Description of Business and Basis of Presentation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
Jun. 18, 2019
Jun. 13, 2019
May 05, 2019
Feb. 03, 2019
Apr. 29, 2018
Subsidiary, Sale of Stock [Line Items]          
Common stock outstanding (in shares)     100 100  
Subsequent Event          
Subsidiary, Sale of Stock [Line Items]          
Underwriting discounts and commissions $ 6.2        
Subsequent Event | IPO          
Subsidiary, Sale of Stock [Line Items]          
Sale of stock (in dollars per share) $ 22        
Sale of stock $ 111.5        
Class B | Subsequent Event          
Subsidiary, Sale of Stock [Line Items]          
Common stock outstanding (in shares) 345,125,000        
Conversion of stock (in shares) (47,875,000) 393,000,000      
Class A          
Subsidiary, Sale of Stock [Line Items]          
Common stock outstanding (in shares)     0   0
Class A | Subsequent Event          
Subsidiary, Sale of Stock [Line Items]          
Common stock outstanding (in shares) 53,475,000        
Conversion of stock (in shares) 47,875,000        
Class A | Subsequent Event | IPO          
Subsidiary, Sale of Stock [Line Items]          
Sale of stock (in shares) 5,600,000