v3.26.3
Accumulated Other Comprehensive Loss Attributable to Tronox Holdings plc and Other Equity Items - Schedule of Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance $ 1,191 $ 1,679 $ 1,449 $ 1,791
Ending balance 1,154 1,593 1,154 1,593
Accumulated Other Comprehensive Loss        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (694) (769) (717) (880)
Other comprehensive income (loss) 21 18 43 128
Amounts reclassified from accumulated other comprehensive loss     1 1
Ending balance (673) (751) (673) (751)
Cumulative Translation Adjustment        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (620) (686) (627) (801)
Other comprehensive income (loss) (2) 21 5 136
Amounts reclassified from accumulated other comprehensive loss     0 0
Ending balance (622) (665) (622) (665)
Pension Liability Adjustment        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (84) (83) (83) (84)
Other comprehensive income (loss) 0 0 (2) 0
Amounts reclassified from accumulated other comprehensive loss     1 1
Ending balance (84) (83) (84) (83)
Unrealized Gains (Losses) on Hedges        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance 10 0 (7) 5
Other comprehensive income (loss) 23 (3) 40 (8)
Amounts reclassified from accumulated other comprehensive loss     0 0
Ending balance $ 33 $ (3) $ 33 $ (3)