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Accumulated Other Comprehensive Loss Attributable to Tronox Holdings plc (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Balance, beginning of period $ 1,871 $ 916
Acquisition of noncontrolling interest 0  
Balance, end of period 1,857 679
Accumulated Other Comprehensive Loss    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Balance, beginning of period (610) (606)
Other comprehensive income (loss) (22) (229)
Acquisition of noncontrolling interest (34)  
Amounts reclassified from accumulated other comprehensive income (2) 6
Balance, end of period (668) (829)
Cumulative Translation Adjustment    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Balance, beginning of period (491) (503)
Other comprehensive income (loss) (32) (141)
Acquisition of noncontrolling interest (34)  
Amounts reclassified from accumulated other comprehensive income 0 0
Balance, end of period (557) (644)
Pension Liability Adjustment    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Balance, beginning of period (120) (104)
Other comprehensive income (loss) (1) 0
Acquisition of noncontrolling interest 0  
Amounts reclassified from accumulated other comprehensive income 1 1
Balance, end of period (120) (103)
Unrealized Gains (Losses) on Hedges    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Balance, beginning of period 1 1
Other comprehensive income (loss) 11 (88)
Acquisition of noncontrolling interest 0  
Amounts reclassified from accumulated other comprehensive income (3) 5
Balance, end of period $ 9 $ (82)