v3.26.1
Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Earnings Per Share [Abstract]        
Net income (loss) attributable to Avis Budget Group, Inc. for basic and diluted EPS $ 35 $ 4 $ (248) $ (501)
Basic weighted average shares outstanding (in shares) 35.3 35.2 35.3 35.2
Non-vested stock (in shares) 0.4 0.2 0.0 0.0
Diluted weighted average shares outstanding (in shares) 35.7 35.4 35.3 35.2
Earnings (loss) per share        
Basic (in usd per share) $ 1.00 $ 0.10 $ (7.01) $ (14.24)
Diluted (in usd per share) $ 0.98 $ 0.10 $ (7.01) $ (14.24)
Non-vested stock awards        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities (in shares)   0.1 0.6 0.4