v3.24.3
Stockholders' Equity - Additional Information (Details)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 23, 2024
shares
Sep. 30, 2024
USD ($)
Vote
$ / shares
shares
Sep. 30, 2024
USD ($)
Vote
$ / shares
shares
Jul. 16, 2024
USD ($)
Jun. 30, 2024
shares
Jun. 18, 2024
USD ($)
Mar. 20, 2024
USD ($)
Dec. 31, 2023
$ / shares
shares
Jul. 02, 2021
shares
Class Of Stock [Line Items]                  
Preferred stock, shares authorized   1,000,000 1,000,000         1,000,000.0  
Preferred stock, par value (in dollars per share) | $ / shares   $ 0.0001 $ 0.0001         $ 0.0001  
Preferred stock, shares issued   0 0         0  
Preferred stock, shares outstanding   0 0         0  
Conversion ratio   1 1            
Increase in equity | $     $ 273            
Additional paid-in-capital deferred tax liabilities | $     18            
Remaining authorized amount for future share repurchase program | $   $ 93 93            
Accelerated Share Repurchase | Barclays Bank PLC                  
Class Of Stock [Line Items]                  
Common stock repurchase, authorized amount | $           $ 75      
Accelerated share repurchase payments | $       $ 75          
Percentage of shares equal to the settlement amount       0.80          
Tax Receivable Agreement Liability                  
Class Of Stock [Line Items]                  
Additional TRA liabilities | $     $ 90            
Class A Common Stock                  
Class Of Stock [Line Items]                  
Common stock, shares outstanding   532,444,353 532,444,353         510,900,000  
Common shares, votes per share | Vote   1 1            
Common stock, shares issued   559,500,000 559,500,000         517,300,000  
Common stock, shares authorized   1,000,000,000 1,000,000,000         1,000,000,000  
Common stock, par value (in dollars per share) | $ / shares   $ 0.0001 $ 0.0001         $ 0.0001  
Conversion of noncontrolling interest (in shares)     28,937,401            
Remaining authorized amount for future share repurchase program | $             $ 200    
Number of shares repurchased     20,697,906            
Class A Common Stock | Accelerated Share Repurchase                  
Class Of Stock [Line Items]                  
Accelerated share repurchase payments | $   $ 75 $ 75            
Number of shares repurchased 2,400,041 10,563,306              
Class B Common Stock                  
Class Of Stock [Line Items]                  
Common stock, shares outstanding   10,000,000.0 10,000,000.0         9,900,000  
Issuance of common units (in shares)     14,999,998            
Common stock, shares issued   10,000,000.0 10,000,000.0         9,900,000  
Common stock, shares authorized   20,000,000.0 20,000,000.0         20,000,000.0  
Common stock, par value (in dollars per share) | $ / shares   $ 0.0001 $ 0.0001         $ 0.0001  
Class B-1 Common Stock                  
Class Of Stock [Line Items]                  
Common stock, shares outstanding   4,978,807 4,978,807            
Common stock, shares issued   4,978,807 4,978,807            
Common stock shares conversion ratio     1            
Common stock shares convertible stock price trigger | $ / shares     $ 12.50            
Common stock shares convertible threshold trading days     20 days            
Common stock shares convertible threshold consecutive trading days     30 days            
Common stock shares convertible stock valuation price on diluted basis | $ / shares     $ 12.50            
Class B-2 Common Stock                  
Class Of Stock [Line Items]                  
Common stock, shares outstanding   4,978,807 4,978,807            
Common stock, shares issued   4,978,807 4,978,807            
Common stock shares conversion ratio     1            
Common stock shares convertible stock price trigger | $ / shares     $ 15.00            
Common stock shares convertible threshold trading days     20 days            
Common stock shares convertible threshold consecutive trading days     30 days            
Common stock shares convertible stock valuation price on diluted basis | $ / shares     $ 15.00            
Class B-3 Common Stock                  
Class Of Stock [Line Items]                  
Common stock, shares outstanding   0 0            
Common stock, shares issued   0 0            
Common stock, shares authorized   10,000,000 10,000,000            
Common stock, par value (in dollars per share) | $ / shares   $ 0.0001 $ 0.0001            
Class V Common Stock                  
Class Of Stock [Line Items]                  
Common stock, shares outstanding   560,433 560,433   554,568     28,962,218  
Common shares, votes per share | Vote   1 1            
Common stock, shares issued   600,000 600,000         29,000,000.0  
Common stock shares conversion ratio     1            
Common stock, shares authorized   175,000,000.0 175,000,000.0         175,000,000.0  
Common stock, par value (in dollars per share) | $ / shares   $ 0.0001 $ 0.0001         $ 0.0001  
Shares issued (in shares)     560,433            
Conversion of noncontrolling interest (in shares)   (529,751) (28,937,401)            
Class Z Common Stock                  
Class Of Stock [Line Items]                  
Common stock, shares outstanding   0 0   578,097     3,420,215  
Common stock, shares issued   0.0 0.0         3,400,000 8,671,507
Common stock, shares authorized   12,900,000 12,900,000         12,900,000  
Common stock, par value (in dollars per share) | $ / shares   $ 0.0001 $ 0.0001         $ 0.0001  
Class Z Common Units                  
Class Of Stock [Line Items]                  
Common stock, shares outstanding   0 0            
Class A Units                  
Class Of Stock [Line Items]                  
Common stock, shares outstanding   533,004,786 533,004,786            
Held by non controlling interest     560,433            
Alight Holdings | Class B-1 Common Units                  
Class Of Stock [Line Items]                  
Common stock, shares outstanding   2,521,192 2,521,192            
Common stock, shares issued   2,521,192 2,521,192            
Common stock shares conversion ratio     1            
Common stock shares convertible stock price trigger | $ / shares     $ 12.50            
Common stock shares convertible threshold trading days     20 days            
Common stock shares convertible threshold consecutive trading days     30 days            
Common stock shares convertible stock valuation price on diluted basis | $ / shares     $ 12.50            
Alight Holdings | Class B-2 Common Units                  
Class Of Stock [Line Items]                  
Common stock, shares outstanding   2,521,192 2,521,192            
Common stock, shares issued   2,521,192 2,521,192            
Common stock shares conversion ratio     1            
Common stock shares convertible stock price trigger | $ / shares     $ 15.00            
Common stock shares convertible threshold trading days     20 days            
Common stock shares convertible threshold consecutive trading days     30 days            
Common stock shares convertible stock valuation price on diluted basis | $ / shares     $ 15.00