v3.25.3
Equity - Narrative (Details)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 12 Months Ended
Sep. 30, 2025
USD ($)
vote
$ / shares
shares
Jan. 27, 2025
USD ($)
$ / shares
shares
Sep. 30, 2025
vote
$ / shares
shares
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
$ / shares
Sep. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
Class of Stock [Line Items]                
Stock split, conversion ratio   4,520.3317            
Stock options granted (in shares) | shares   14            
Stock options granted, exercise price (in usd per share)   $ 25.00            
Common stock authorized for issuance (in shares) | shares 172   172          
Common stock dividends per share (in usd per share) $ 0.02              
Common Stock, Dividends, Per Share, Declared     $ 0.02          
Common stock dividends | $ $ 42     $ 40 $ 40 $ 40 $ 40 $ 160
Stock options                
Class of Stock [Line Items]                
Options contractual term   10 years            
Options vesting period   4 years            
Class A common stock                
Class of Stock [Line Items]                
Stock issued and sold (in shares) | shares   70            
Common stock, par value (in usd per share) $ 0.01 $ 0.01 $ 0.01     $ 0.01    
Stock issued and sold, price per share (in usd per share)   $ 25.00            
Proceeds from issuance and sale of stock | $   $ 1,700            
Underwriting discounts and commissions | $   70            
Offering expenses | $   $ 10            
Conversion of Class A common stock to Class B common stock (in shares) | shares   (1,970)            
Common stock, number of votes per share | vote 1   1          
Class B common stock                
Class of Stock [Line Items]                
Common stock, par value (in usd per share) $ 0.01   $ 0.01     $ 0.01    
Conversion of Class A common stock to Class B common stock (in shares) | shares   1,970            
Common stock, number of votes per share | vote 10   10