v3.26.3
Stockholders' Deficit - Schedule of Stockholders' Deficit (Details) - USD ($)
$ in Millions
 3 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Class of Stock [Line Items]            
Equity, beginning balance $ (1,164) $ (1,225) $ (1,159) $ (1,412) $ (1,693) $ (1,676)
Redeemable Noncontrolling Interests, beginning balance     322      
Comprehensive income (loss) (70) 89 (36) 155 308 15
Purchases of subsidiary shares from noncontrolling interests       (2)    
Distributions to noncontrolling interests (29) (24) (24) (15) (28) (25)
Disposition of less-than-wholly owned entity     (4)   (7) (8)
Adjustment to redemption value of redeemable noncontrolling interests 12 (6) (3) (1) 5 (2)
Cancellation of restricted stock for tax withholdings on vested shares     (2)     (1)
Stock-based compensation 2 2 3 1 3 4
Equity, ending balance (1,273) (1,164) (1,225) (1,274) (1,412) (1,693)
Redeemable Noncontrolling Interests, ending balance 336          
Redeemable Noncontrolling Interests (Non- Equity)            
Class of Stock [Line Items]            
Redeemable Noncontrolling Interests, beginning balance 320 260 322 314 364 359
Comprehensive income (loss) 13 13 11 16 14 13
Contributions from noncontrolling interests 1     1 1  
Distributions to noncontrolling interests (10)          
Distributions to redeemable noncontrolling interests   (9) (33) (9) (33) (10)
Noncontrolling interests in acquired entity   51        
Disposition of less-than-wholly owned entity   (1) (41)   (27)  
Adjustment to redemption value of redeemable noncontrolling interests 12 6 1 1 (5) 2
Redeemable Noncontrolling Interests, ending balance 336 320 260 323 314 364
Common Stock            
Class of Stock [Line Items]            
Equity, beginning balance 1 1 1 1 1 1
Equity, ending balance 1 1 1 1 1 1
Additional Paid-in Capital            
Class of Stock [Line Items]            
Equity, beginning balance 2,179 2,183 2,185 2,184 2,176 2,175
Purchases of subsidiary shares from noncontrolling interests       (1)    
Adjustment to redemption value of redeemable noncontrolling interests (12) (6) (3) (1) 5 (2)
Cancellation of restricted stock for tax withholdings on vested shares     (2)     (1)
Stock-based compensation 2 2 3 1 3 4
Equity, ending balance 2,169 2,179 2,183 2,183 2,184 2,176
Accumulated Other Comprehensive (Loss) Income            
Class of Stock [Line Items]            
Equity, beginning balance (11) (10) (9) (5) (7) (10)
Comprehensive income (loss) (7) (1) (1)   2 3
Equity, ending balance (18) (11) (10) (5) (5) (7)
Accumulated Deficit            
Class of Stock [Line Items]            
Equity, beginning balance (3,559) (3,628) (3,571) (3,811) (4,093) (4,080)
Comprehensive income (loss) (85) 69 (57) 130 282 (13)
Equity, ending balance (3,644) (3,559) (3,628) (3,681) (3,811) (4,093)
Noncontrolling Interest            
Class of Stock [Line Items]            
Equity, beginning balance 226 229 235 219 230 238
Comprehensive income (loss) 22 21 22 25 24 25
Purchases of subsidiary shares from noncontrolling interests       (1)    
Distributions to noncontrolling interests (29) (24) (24) (15) (28) (25)
Disposition of less-than-wholly owned entity     (4)   (7) (8)
Equity, ending balance $ 219 $ 226 $ 229 $ 228 $ 219 $ 230