Tronox (TROX) 10-K 23 Feb 21 2020 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2020	Jan. 31, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	1-35573
Entity Registrant Name	TRONOX HOLDINGS PLC
Entity Incorporation, State or Country Code	X0
Entity Tax Identification Number	98-1467236
Entity Address, Address Line One	263 Tresser Boulevard,
Entity Address, Address Line Two	Suite 1100
Entity Address, City or Town	Stamford
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06901
City Area Code	203
Local Phone Number	705-3800
Title of 12(b) Security	Ordinary Shares, par value $0.01 per share
Security Exchange Name	NYSE
Trading Symbol	TROX
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 658,566,488
Entity Common Stock, Shares Outstanding		143,557,479
Documents Incorporated by Reference	Portions of the registrant’s proxy statement for its 2021 annual general meeting of shareholders are incorporated by reference in this Form 10-K in response to Part III Items 10, 11, 12, 13 and 14.
Entity Central Index Key	0001530804
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net sales	$ 2,758	$ 2,642	$ 1,819
Cost of goods sold	2,137	2,159	1,321
Contract loss	0	19	0
Gross profit	621	464	498
Selling, general and administrative expenses	347	347	267
Restructuring	3	22	0
Impairment loss	0	0	31
Income from operations	271	95	200
Interest expense	(189)	(201)	(193)
Interest income	8	18	33
Loss on extinguishment of debt	(2)	(3)	(30)
Other income (expense), net	26	3	33
Income (loss) from continuing operations before income taxes	114	(88)	43
Income tax benefit (provision)	881	(14)	(13)
Net income (loss) from continuing operations	995	(102)	30
Net income from discontinued operations, net of tax	0	5	0
Net income (loss)	995	(97)	30
Net income	26	12	37
Net income (loss) attributable to Tronox Holdings plc	$ 969	$ (109)	$ (7)
Net income (loss) per share, basic:
(Loss) income from continuing operations per share, basic and diluted (in dollars per share)	$ 6.76	$ (0.81)	$ (0.06)
Discontinued operations (in dollars per share)	0	0.03	0
Net income (loss) per share, basic (in dollars per share)	6.76	(0.78)	(0.06)
Net income (loss) per share, diluted:
Income from discontinued operations per share, basic and diluted (in dollars per share)	6.69	(0.81)	(0.06)
Discontinued operations (in dollars per share)	0	0.03	0
Net income (loss) per share, diluted (in dollars per share)	$ 6.69	$ (0.78)	$ (0.06)
Weighted average shares outstanding, basic (in thousands) (in shares)	143,355	139,859	122,881
Weighted average shares outstanding, diluted (in thousands) (in shares)	144,906	139,859	122,881

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 995	$ (97)	$ 30
Other comprehensive income (loss):
Foreign currency translation adjustments	(4)	19	(177)
Pension and postretirement plans (See Note 23):
Actuarial losses, net of taxes of $5, $1 and less than $1 in 2020, 2019 and 2018, respectively	(20)	(11)	(5)
Amortization of unrecognized actuarial losses, net of taxes of less than $1 in 2020, 2019, and 2018	4	2	3
Settlement gain reclassified from accumulated other comprehensive loss to the Consolidated Statements of Operations (no tax impact)	0	0	(3)
Total pension and postretirement losses	(16)	(9)	(5)
Realized losses (gains) on derivative instruments reclassified from accumulated other comprehensive loss to the Consolidated Statements of Operations	4	(7)	0
Unrealized (losses) gains on derivative financial instruments, (net of taxes of $5, $5 in 2020 and 2019, respectively and no tax impact in 2018; See Note 16)	(4)	8	1
Other comprehensive (loss) income	(20)	11	(181)
Total comprehensive income (loss)	975	(86)	(151)
Comprehensive income (loss) attributable to noncontrolling interest:
Net income	26	12	37
Foreign currency translation adjustments	(16)	16	(44)
Comprehensive income (loss) attributable to noncontrolling interest	10	28	(7)
Comprehensive income (loss) attributable to Tronox Holdings plc	$ 965	$ (114)	$ (144)

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Actuarial gains (losses), tax	$ 5,000,000	$ 1,000,000	$ 1,000,000
Amortization of unrecognized actuarial losses, tax (less than)	1,000,000	1,000,000	1,000,000
Unrealized gains (loss) on derivative instruments, tax	$ 5,000,000	$ 5,000,000	$ 0

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Current Assets
Cash and cash equivalents	$ 619	$ 302
Restricted cash	29	9
Accounts receivable (net of allowance of $5 in 2020 and $5 in 2019)	540	482
Inventories, net	1,137	1,131
Prepaid and other assets	200	143
Income taxes receivable	4	6
Total current assets	2,529	2,073
Noncurrent Assets
Property, plant and equipment, net	1,759	1,762
Mineral leaseholds, net	803	852
Intangible assets, net	201	208
Lease right of use assets, net	81	101
Deferred tax assets	1,020	110
Other long-term assets	175	162
Total assets	6,568	5,268
Current Liabilities
Accounts payable	356	342
Accrued liabilities	350	283
Short-term lease liabilities	39	38
Long-term debt due within one year	58	38
Income taxes payable	2	1
Total current liabilities	805	702
Noncurrent Liabilities
Long-term debt, net	3,263	2,988
Pension and postretirement healthcare benefits	146	160
Asset retirement obligations	157	142
Environmental liabilities	67	65
Long-term lease liabilities	41	62
Deferred tax liabilities	176	184
Other long-term liabilities	42	49
Total liabilities	4,697	4,352
Commitments and Contingencies - Note 20
Shareholders’ Equity
Tronox Holdings plc ordinary shares, par value $0.01 — 143,557,479 shares issued and outstanding at December 31, 2020 and 141,900,459 shares issued and outstanding at December 31, 2019	1	1
Capital in excess of par value	1,873	1,846
Retained Earnings (accumulated deficit)	434	(493)
Accumulated other comprehensive loss	(610)	(606)
Total Tronox Holdings plc shareholders’ equity	1,698	748
Noncontrolling interest	173	168
Total equity	1,871	916
Total liabilities and equity	$ 6,568	$ 5,268

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Current Assets
Allowance	$ 5	$ 5
Shareholders’ Equity
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	143,557,479	141,900,459
Common stock, shares outstanding (in shares)	143,557,479	141,900,459

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash Flows from Operating Activities:
Net income (loss)	$ 995	$ (97)	$ 30
Net income from discontinued operations, net of tax	0	5	0
Net (loss) income from continuing operations	995	(102)	30
Adjustments to reconcile net (loss) income from continuing operations to net cash provided by operating activities, continuing operations:
Depreciation, depletion and amortization	304	280	195
Deferred income taxes	(899)	(9)	(21)
Share-based compensation expense	30	32	21
Amortization of deferred debt issuance costs and discount on debt	10	8	11
Loss on extinguishment of debt	2	3	30
Contract loss	0	19	0
Impairment loss	0	0	31
Acquired inventory step-up recognized in earnings	0	98	0
Other non-cash affecting net income (loss)	65	25	(9)
Changes in assets and liabilities:
(Increase) decrease in accounts receivable, net	(49)	78	(11)
(Increase) decrease in inventories, net	(21)	(59)	(47)
(Increase) decrease in prepaid and other assets	(29)	20	4
Increase (decrease) in accounts payable and accrued liabilities	17	67	(51)
Net changes in income tax payables and receivables	(2)	(13)	10
Changes in other non-current assets and liabilities	(68)	(35)	(23)
Cash provided by operating activities – continuing operations	355	412	170
Cash Flows from Investing Activities:
Capital expenditures	(195)	(198)	(117)
Cristal Acquisition	0	(1,675)	0
Insurance proceeds	1	10	0
Loans	(36)	(25)	(64)
Proceeds from the sale of assets	1	2	1
Cash used in investing activities – continuing operations	(229)	(1,185)	(174)
Cash Flows from Financing Activities:
Repayments of short-term debt	(13)	0	0
Repayments of long-term debt	(233)	(387)	(606)
Proceeds from short-term debt	13	0	0
Proceeds from long-term debt	500	222	615
Repurchase of common stock	0	(288)	0
Acquisition of noncontrolling interest	0	(148)	0
Debt issuance costs	(10)	(4)	(10)
Call premium paid	0	0	(22)
Dividends paid	(40)	(27)	(23)
Restricted stock and performance-based shares settled in cash for taxes	(3)	(6)	(6)
Proceeds from the exercise of warrants and options	0	0	6
Cash provided by (used in) financing activities – continuing operations	214	(638)	(46)
Discontinued Operations:
Cash provided by operating activities	0	29	0
Cash used in investing activities	0	(1)	0
Net cash flows provided by discontinued operations	0	28	0
Effects of exchange rate changes on cash and cash equivalents and restricted cash	(3)	(2)	(23)
Net increase (decrease) in cash and cash equivalents and restricted cash	337	(1,385)	(73)
Cash and cash equivalents and restricted cash at beginning of period	311	1,696	1,769
Cash and cash equivalents and restricted cash at end of period - continuing operations	648	311	1,696
Supplemental cash flow information - continuing operations:
Interest paid, net	159	188	184
Income taxes paid	17	34	28
Cristal's North American TiO2 Business
Cash Flows from Investing Activities:
Proceeds from sale of businesses	0	701	0
Other Disposals
Cash Flows from Investing Activities:
Proceeds from sale of businesses	$ 0	$ 0	$ 6

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Tronox Holdings plc Ordinary Shares	Capital in Excess of par Value	(Accumulated Deficit) Retained Earnings	Accumulated Other Comprehensive Loss	Total Tronox Limited Shareholders’ Equity	Non- controlling Interest
Balance, beginning of period (in shares) at Dec. 31, 2017		121,271,000
Beginning Balance at Dec. 31, 2017	$ 1,015	$ 1	$ 1,558	$ (327)	$ (403)	$ 829	$ 186
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	30			(7)		(7)	37
Other comprehensive loss	(181)				(137)	(137)	(44)
Shares-based compensation (in shares)		1,426,000
Shares-based compensation	21		21			21
Shares cancelled (in shares)		(316,000)
Shares cancelled	(6)		(6)			(6)
Warrants and options (in shares)		553,000
Warrants and options exercised	6		6			6
Ordinary share dividends	$ (23)			(23)		(23)
Ordinary share dividends (in dollars per share)	$ 0.045
Balance, end of period (in shares) at Dec. 31, 2018		122,934,000
Ending Balance at Dec. 31, 2018	$ 862	$ 1	1,579	(357)	(540)	683	179
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(97)			(109)		(109)	12
Other comprehensive loss	11				(5)	(5)	16
Shares-based compensation (in shares)		3,347,000
Shares-based compensation	32		32			32
Shares issued for acquisition (in shares)		37,580,000
Shares issued for acquisition	526		526			526
Shares repurchased and cancelled (in shares)		(21,453,000)
Shares repurchased and cancelled	(288)		(288)			(288)
Shares cancelled (in shares)		(508,000)
Shares cancelled	(6)		(6)			(6)
Acquisition of noncontrolling interest	(148)		3		(61)	(58)	(90)
Cristal acquisition	51						51
Ordinary share dividends	$ (27)			(27)		(27)
Ordinary share dividends (in dollars per share)	$ 0.045
Balance, end of period (in shares) at Dec. 31, 2019	141,900,459	141,900,000
Ending Balance at Dec. 31, 2019	$ 916	$ 1	1,846	(493)	(606)	748	168
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	995			969		969	26
Other comprehensive loss	(20)				(4)	(4)	(16)
Shares-based compensation (in shares)		2,032,000
Shares-based compensation	30		30			30
Shares cancelled (in shares)		(375,000)
Shares cancelled	(3)		(3)			(3)
Acquisition of noncontrolling interest	(3)						(3)
Ordinary share dividends	$ (42)			(42)		(42)
Ordinary share dividends (in dollars per share)	$ 0.07
Minority interest dividend	$ (2)						(2)
Balance, end of period (in shares) at Dec. 31, 2020	143,557,479	143,557,000
Ending Balance at Dec. 31, 2020	$ 1,871	$ 1	$ 1,873	$ 434	$ (610)	$ 1,698	$ 173

The Company

The Company	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
The Company	The Company Tronox Holdings plc (referred to herein as "Tronox", the "Company", "we", "us", or "our") operates titanium-bearing mineral sand mines and smelter operations in Australia, South Africa and Brazil to produce feedstock materials that can be processed into TiO 2 for pigment, high purity titanium chemicals, including titanium tetrachloride, and Ultrafine© titanium dioxide used in certain specialty applications. It is our long-term strategic goal to be vertically integrated and consume all of our feedstock materials in our own nine TiO 2 pigment facilities which we operate in the United States, Australia, Brazil, UK, France, the Netherlands, China and the Kingdom of Saudi Arabia (“KSA”). We believe that vertical integration is the best way to achieve our ultimate goal of delivering low cost, high-quality pigment to our coatings and other TiO 2 customers throughout the world. The mining, beneficiation and smelting of titanium bearing mineral sands creates meaningful quantities of zircon, which we also supply to customers around the world. We are a public limited company formed under the laws of England and Wales. Tronox was formerly listed on the New York Stock Exchange as Tronox Limited, a company formed under the laws of Western Australia. However, in March 2019, we re-domiciled to the United Kingdom, and as a result of the re-domiciling, Tronox Limited became a wholly-owned subsidiary of Tronox Holdings plc. Another significant corporate milestone occurred on April 10, 2019 when we completed the acquisition from National Industrialization Company ("Tasnee") of the TiO 2 business of The National Titanium Dioxide Company Limited (“Cristal”) (the “Cristal Transaction”). The Cristal Transaction doubled our size and expanded the number of TiO 2 pigment facilities we operate from three to nine and gave us control of several new mines, particularly in Australia. In order to obtain regulatory approval for the Cristal Transaction, we were required to divest Cristal's North American TiO 2 business, which was sold in May 2019. See Note 3 for further details on the Cristal Transaction. Basis of Presentation We are considered a domestic company in the United Kingdom and, as such, are required to comply with filing requirements in the United Kingdom. Additionally, we are not considered a “foreign private issuer” in the U.S.; therefore, we are required to comply with the reporting and other requirements imposed by the U.S. securities law on U.S. domestic issuers, which, among other things, requires reporting under accounting principles generally accepted in the United States of America (“U.S. GAAP”). The consolidated financial statements included in this Form 10-K are prepared in conformity with U.S. GAAP. Our consolidated financial statements include the accounts of all majority-owned subsidiary companies. All intercompany balances and transactions have been eliminated in consolidation. Certain prior period amounts have been reclassified to conform to the manner and presentation in the current period. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. It is at least reasonably possible that the effect on the financial statements of a change in estimate due to one or more future confirming events could have a material effect on the financial statements.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies Foreign Currency The U.S. dollar is our reporting currency for our consolidated financial statements in U.S. GAAP. We determine the functional currency of each subsidiary based on a number of factors, including the predominant currency for revenues, expenditures and borrowings. Adjustments from the remeasurement of non-functional currency monetary assets and liabilities are recorded in “Other income (expense), net” in the Consolidated Statements of Operations. When a subsidiary’s functional currency is not the U.S. dollar, translation adjustments resulting from translating the functional currency financial statements into U.S. dollar equivalents are recorded in “Accumulated other comprehensive loss” in the Consolidated Balance Sheets. Translation adjustments on intercompany foreign currency receivables and payables that are not expected to be settled in the foreseeable future are reported in the same manner as translation adjustments. Revenue Recognition We recognize revenue at a point in time when the customer obtains control of the promised products. For most transactions this occurs when products are shipped from our manufacturing facilities or at a later point when control of the products transfers to the customer at a specified destination or time. All amounts billed to a customer in a sales transaction related to shipping and handling represent revenues earned and are reported as “Net sales” in the Consolidated Statements of Operations. Accruals are made for sales returns, rebates and other allowances, which are recorded in “Net sales” in the Consolidated Statements of Operations and are based on our historical experience and current business conditions. Additionally, we have elected the practical expedient to exclude sales taxes and similar taxes that we collect from customers on behalf of government authorities from the revenue transaction price. See Note 5. Cost of Goods Sold Cost of goods sold includes costs for purchasing, receiving, manufacturing, and distributing products, including raw materials, energy, labor, depreciation, depletion, shipping and handling, freight, warehousing, and other production costs. Research and Development Research and development costs, included in “Selling, general and administrative expenses” in the Consolidated Statements of Operations comprised of salaries, building costs, utilities, administrative expenses, third party research, and allocations of corporate costs, were $12 million, $17 million, and $11 million during 2020, 2019, and 2018, respectively, and were expensed as incurred. Selling, General and Administrative Expenses Selling, general and administrative expenses include costs related to marketing, research and development, agent commissions, and legal and administrative functions such as corporate management, human resources, information technology, investor relations, accounting, treasury, and tax compliance. Income Taxes We use the asset and liability method of accounting for income taxes. The estimation of the amounts of income taxes involves the interpretation of complex tax laws and regulations and how foreign taxes affect domestic taxes, as well as the analysis of the realizability of deferred tax assets, tax audit findings, and uncertain tax positions. Deferred tax assets and liabilities are determined based on temporary differences between the financial reporting and tax bases of assets and liabilities using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. A valuation allowance is provided against a deferred tax asset when it is more likely than not that all or some portion of the deferred tax asset will not be realized. We periodically assess the likelihood that we will be able to recover our deferred tax assets, and reflect any changes in our estimates in the valuation allowance, with a corresponding adjustment to earnings or other comprehensive income (loss), as appropriate. All available positive and negative evidence is weighted to determine whether a valuation allowance should be recorded. The amount of income taxes we pay is subject to ongoing audits by federal, state, and foreign tax authorities, which may result in proposed assessments. Our estimate for the potential outcome for any uncertain tax issue is highly judgmental. We assess our income tax positions, and record tax benefits for all years subject to examination based upon our evaluation of the facts, circumstances, and information available at the reporting date. For those tax positions for which it is more likely than not that a tax benefit will be sustained, we record the amount that has a greater than 50% likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. Interest and penalties are accrued as part of tax expense, where applicable. If we do not believe that it is more likely than not that a tax benefit will be sustained, no tax benefit is recognized. See Note 8. Earnings per Share Basic and diluted earnings per share are calculated using the two-class method. Under the two-class method, earnings used to determine basic earnings per share are reduced by an amount allocated to participating securities. Participating securities include restricted shares issued under the Tronox Management Equity Incentive Plan (the “MEIP”) (see Note 22), which contains non-forfeitable dividend rights. Our unexercised options and unvested restricted share units do not contain non-forfeitable rights to dividends and, as such, are not considered in the calculation of basic earnings per share. Our unvested restricted shares do not have a contractual obligation to share in losses; therefore, when we record a net loss, none of the loss is allocated to participating securities. Consequently, in periods of net loss, the two-class method does not have an effect on basic loss per share. Diluted earnings per share is calculated by dividing net earnings allocable to ordinary shares by the weighted-average number of ordinary shares outstanding for the period, as adjusted for the potential dilutive effect of non-participating restricted share units, options, and prior to February 2018 Series A and Series B Warrants. The options and Series A and Series B Warrants are included in the calculation of diluted earnings per ordinary share utilizing the treasury stock method. See Note 9. Fair Value Measurement We measure fair value on a recurring basis utilizing valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs, to the extent possible, and consider counterparty credit risk in our assessment of fair value. The fair value hierarchy is as follows: • Level 1 – Quoted prices in active markets for identical assets and liabilities; • Level 2 – Quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active or other inputs that are observable or can be corroborated by observable market data; and, • Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets and liabilities See Note 17. Cash and Cash Equivalents We consider all investments with original maturities of three months or less to be cash equivalents. We maintain cash and cash equivalents in bank deposit and money market accounts that may exceed federally insured limits. The financial institutions where our cash and cash equivalents are held are generally highly rated and geographically dispersed, and we have a policy to limit the amount of credit exposure with any one institution. We have not experienced any losses in such accounts and believe we are not exposed to significant credit risk. At December 31, 2020, we had restricted cash of $29 million comprised of $18 million in Europe related to the termination fee associated with the TTI acquisition, $10 million in Australia related to outstanding performance bonds and $1 million in Saudi Arabia related to vendor supply agreement guarantees. At December 31, 2019, included in restricted cash was $9 million primarily in Australia related to outstanding performance bonds. Accounts Receivable, net of allowance for credit losses We perform credit evaluations of our customers, and take actions deemed appropriate to mitigate credit risk. Only in certain specific occasions do we require collateral in the form of bank or parent company guarantees or guarantee payments. We maintain allowances for potential credit losses based on specific customer review and current financial conditions. Inventories, net Pigment inventories are stated at the lower of actual cost and net realizable value, net of allowances for obsolete and slow-moving inventory. The cost of inventories is determined using the first-in, first-out method. Carrying values include material costs, labor, and associated indirect manufacturing expenses. Costs for materials and supplies, excluding titanium ore, are determined by average cost to acquire. Feedstock and co-products inventories including titanium ore are stated at the lower of the weighted-average cost of production or market. Inventory costs include those costs directly attributable to products, including all manufacturing overhead but excluding distribution costs. Raw materials are carried at actual cost. We review the cost of our inventory in comparison to its net realizable value. We also periodically review our inventory for obsolescence. In either case, we record any write-down equal to the difference between the cost of inventory and its estimated net realizable value based on assumptions about alternative uses, market conditions and other factors. Inventories expected to be sold or consumed within twelve months after the balance sheet date are classified as current assets and all other inventories are classified as non-current assets. See Note 10. Long Lived Assets Property, plant and equipment, net is stated at cost less accumulated depreciation, and is depreciated over its estimated useful life using the straight-line method as follows: Land improvements 10 — 20 years Buildings 10 — 40 years Machinery and equipment 3 — 25 years Furniture and fixtures 10 years Maintenance and repairs are expensed as incurred, except for costs of replacements or renewals that improve or extend the lives of existing properties, which are capitalized. Upon retirement or sale, the cost and related accumulated depreciation are removed from the respective account, and any resulting gain or loss is included in “Cost of goods sold” or “Selling, general, and administrative expenses” in the Consolidated Statements of Operations. See Note 11. We capitalize interest costs on major projects that require an extended period of time to complete. See Note 15. Mineral property acquisition costs are capitalized as tangible assets when management determines that probable future benefits consisting of a contribution to future cash inflows have been identified and adequate financial resources are available or are expected to be available as required to meet the terms of property acquisition and anticipated exploration and development expenditures. Mineral leaseholds are depleted over their useful lives as determined under the units of production method. Mineral property exploration costs are expensed as incurred. When it has been determined that a mineral property can be economically developed as a result of establishing proven and probable reserves, the costs incurred to develop such property through the commencement of production are capitalized. See Note 12. Intangible assets are stated at cost less accumulated amortization and are amortized on a straight-line basis over their estimated useful lives, which generally range from 3 to 20 years. See Note 13. We evaluate the recoverability of the carrying value of long-lived assets that are held and used whenever events or changes in circumstances indicate that the carrying value may not be recoverable. Under such circumstances, we assess whether the projected undiscounted cash flows of our long-lived assets are sufficient to recover the carrying amount of the asset group being assessed. If the undiscounted projected cash flows are not sufficient, we calculate the impairment amount by discounting the projected cash flows using our weighted-average cost of capital. For assets that satisfy the criteria to be classified as held for sale, an impairment loss, if any, is recognized to the extent the carrying amount exceeds fair value, less cost to sell. The amount of the impairment of long-lived assets is written off against earnings in the period in which the impairment is determined. Business Acquisitions Business acquisitions are accounted for using the acquisition method under Accounting Standards Codification (“ASC”) 805, Business Combinations (“ASC 805”), which requires recording assets acquired and liabilities assumed at fair value as of the acquisition date. Under the acquisition method of accounting, each tangible and separately identifiable intangible asset acquired and liabilities assumed is recorded based on their preliminary estimated fair values on the acquisition date. The initial valuations are derived from estimated fair value assessments and assumptions used by management. Acquisition related costs are expensed as incurred and are included in “Selling, general and administrative expenses” in the Consolidated Statements of Operations. Leases We determine if a contract is or contains a lease at inception of the contract. Our leases are primarily operating leases. Leased assets primarily include office buildings, rail cars and motor vehicles, forklifts, and other machinery and equipment. Our leases primarily have fixed lease payments, with real estate leases typically requiring additional payments for real estate taxes and occupancy-related costs. Certain of our leases also have variable lease payments. Variable lease payments that depend on an index or a rate (such as the Consumer Price Index) are included in our initial measurement of the lease right of use assets and lease liabilities. Variable lease payments that are not index or rate based (such as variable payments based on our performance or use of the leased assets) are recorded as expenses when incurred and excluded from the measurement of right of use assets and lease liabilities. Our leases typically have initial lease terms ranging from 1 to 25 years. Some of our lease agreements include options to renew, extend or early terminate the leases. Lease term is the non-cancellable period of a lease, adjusted by the period covered by an option to extend or terminate the lease if we are reasonably certain to exercise (or not exercise) that option. Our operating leases typically do not contain purchase options we expect to exercise, residual value guarantees or other material covenants. Operating leases are recorded under “Lease right of use assets”, “Short-term lease liabilities”, and “Long-term lease liabilities” on the Consolidated Balance Sheets. Finance leases are recorded under “Property, plant and equipment net”, “Long-term debt due within one year”, and “Long-term debt” on the Consolidated Balance Sheets. Operating lease right of use ("ROU") assets and lease liabilities are initially recorded at the present value of the future minimum lease payments over the lease term at the commencement date or the acquisition date for leases acquired in the Cristal Transaction. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at the lease commencement date in determining the present value of future payments. Lease payments for the initial measurement of lease ROU assets and lease liabilities include fixed payments and variable payments that depend on an index or a rate. Variable lease payments that are not index or rate based are recorded as expenses when incurred. Operating lease ROU assets are amortized on a straight-line basis over the period of the lease. Finance lease ROU assets are amortized on a straight-line basis over the shorter of their estimated useful lives of leased asset and the lease terms. See Note 18. Long-term Debt Long-term debt is stated net of unamortized original issue premium or discount. Premiums or discounts are amortized using the effective interest method with amortization expense recorded in “Interest and debt expense, net” in the Consolidated Statements of Operations. Deferred debt issuance costs related to a recognized debt liability are presented in the Consolidated Balance Sheets as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts and are amortized using the effective interest method with amortization expense recorded in “Interest and debt expense, net” in the Consolidated Statements of Operations. See Note 15. Asset Retirement Obligations Asset retirement obligations are recorded at their estimated fair value, and accretion expense is recognized over time as the discounted liability is accreted to its expected settlement value. Fair value is measured using expected future cash outflows discounted at our credit-adjusted risk-free interest rate, which are considered Level 3 inputs. We classify accretion expense related to asset retirement obligations as a production cost, which is included in “Cost of goods sold” in the Consolidated Statements of Operations. See Note 19. Environmental Remediation and Other Contingencies We record an undiscounted liability when litigation has commenced or a claim or assessment has been asserted, or, based on available information, commencement of litigation or assertion of a claim or assessment is probable, and the associated costs can be reasonably estimated. See Note 20. Self-Insurance We are self-insured for certain levels of general and vehicle liability, property, workers’ compensation and health care coverage. The cost of these self-insurance programs is accrued based upon estimated fully developed settlements for known and anticipated claims. Any resulting adjustments to previously recorded reserves are reflected in current operating results. We do not accrue for general or unspecific business risks. Share-based Compensation Equity Restricted Share and Restricted Share Unit Awards — The fair value of equity instruments is measured based on the share price on the grant date and is recognized over the vesting period. These awards contain service, market, and/or performance conditions. For awards containing only a service or a market condition, we have elected to recognize compensation costs using the straight-line method over the requisite service period for the entire award. For awards containing a market condition, the fair value of the award is measured using the Monte Carlo simulation under a lattice model approach. For awards containing a performance condition, the fair value is the grant date close price and compensation expense is not recognized until we conclude that it is probable that the performance condition will be met. We reassess the probability at least quarterly. See Note 22. Defined Benefit Pension and Postretirement Benefit Plans We recognize the funded status of our defined benefit pension plans and postretirement benefit plans in the Consolidated Balance Sheets. The funded status is measured as the difference between the fair value of plan assets and the benefit obligation at the measurement date. The benefit obligation for the defined benefit plans is the projected benefit obligation (PBO), which represents the actuarial present value of benefits expected to be paid upon retirement based on employee services already rendered and estimated future compensation levels. The benefit obligation for our postretirement benefit plans is the accumulated postretirement benefit obligation (APBO), which represents the actuarial present value of postretirement benefits attributed to employee services already rendered. The fair value of plan assets related to our defined benefit plan represents the current market value of assets held in a trust fund, which is established for the sole benefit of plan participants. If the fair value of plan assets exceeds the benefit obligation, the plan is overfunded, and the excess is recorded as a prepaid pension asset. On the other hand, if the benefit obligation exceeds the fair value of plan assets, the plan is underfunded, and the deficit is recorded as pension and postretirement healthcare benefits obligation in the Consolidated Balance Sheet. The portion of the pension and postretirement healthcare obligations payable within the next 12 months is recorded in accrued liabilities in the Consolidated Balance Sheet. Net periodic pension and postretirement benefit cost represents the aggregation of service cost, interest cost, expected return on plan assets, amortization of prior service costs or credits and actuarial gains or losses previously recognized as a component of OCI and it is recorded in the Consolidated Statement of Operations. Net periodic cost is recorded in cost of goods sold and selling, general and administrative expenses in the Consolidated Statement of Operations based on the employees’ respective functions. Actuarial gains or losses represents the effect of remeasurement on the benefit obligation principally driven by changes in the plan actuarial assumptions. Prior service costs or credits arise from plan amendments. The actuarial gains or losses and prior service costs or credits are initially recognized as a component of Other Comprehensive income in the Consolidated Statement of Comprehensive Income (Loss). Those gains or losses and prior service costs or credits are subsequently recognized as a component of net periodic cost. The measurement of benefit obligations and net periodic cost is based on estimates and assumptions approved by management. These valuations reflect the terms of the plans and use participant-specific information such as compensation, age and years of service, as well as certain assumptions, including estimates of discount rates, expected return on plan assets, rate of compensation increases and mortality rates. Defined Contribution Plans — We recognize our contribution as expense when they are due. The expense is recorded in cost of goods sold or selling, general and administrative expenses the Consolidated Statement of Operations based on the employees’ respective functions. Multiemployer Plan — We treat our multiemployer plan like a defined contribution plan. A pension plan to which two or more unrelated employers contribute is generally considered to be a multiemployer plan. As a defined contribution plan, we recognize the contribution for the period as a net benefit cost and any contributions due and unpaid as a liability. Recently Adopted Accounting Pronouncements In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (“Topic 820”): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. The standard modifies the disclosure requirements in Topic 820, Fair Value Measurement, by: removing certain disclosure requirements related to the fair value hierarchy; modifying existing disclosure requirements related to measurement uncertainty; and adding new disclosure requirements, such as disclosing the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and disclosing the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. This standard is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2019, with early adoption permitted. We adopted this standard on January 1, 2020 and it did not have a material impact on the Company's consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), as amended. The standard introduces a new accounting model for expected credit losses on financial instruments, including trade receivables, based on estimates of current expected credit losses (CECL). This standard became effective on January 1, 2020, and had an immaterial impact on the Company's consolidated financial statements as our historical bad debt expense has not been material. Recently Issued Accounting Pronouncements In December 2019, the FASB issued ASU 2019-12, Income Taxes (“Topic 740”): Simplifying the Accounting for Income Taxes. The standard simplifies the accounting for income taxes by removing the exceptions to the incremental approach for intraperiod tax allocation, the requirement to recognize deferred tax liability for equity method investments, the ability not to recognize a deferred tax liability for a foreign subsidiary when a foreign equity method investment becomes a subsidiary, and the general methodology for calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. This standard is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2020 with early adoption permitted. We do not believe this standard will have a material impact on our consolidated financial statements.

Acquisitions and Related Divest

Acquisitions and Related Divestitures	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Acquisitions and Related Divestitures	Acquisitions and Related DivestituresTTI Acquisition In May 2020, the Company announced that it had signed a definitive agreement to acquire the Tizir Titanium and Iron ("TTI") business from Eramet S.A. for approximately $300 million in cash, plus 3% per annum which accrues for the period from January 1, 2020 until the transaction closes. TTI is a titanium smelter located in Tyssedal, Norway which upgrades ilmenite to produce high-grade titanium slag and high-purity pig iron with an annual capacity of approximately 230,000 tons and 90,000 tons, respectively. Pursuant to the definitive agreement, we were required to pay to Eramet S.A. a termination fee of $18 million if the agreement is terminated as a result of a failure to satisfy certain regulatory approvals prior to May 13, 2021. During the second quarter of 2020, upon signing of the definitive agreement to acquire TTI, we placed $18 million into an escrow account with a third-party financial institution. One of the conditions to the transaction was the obtaining of certain regulatory approvals that would include UK Competition and Markets Authority (“CMA”) approval by no later than a date specified in the definitive agreement (the “Condition Satisfaction Date”). On January 4, 2021, the Company received a decision from the CMA indicating that it intended to open a Phase 2 investigation into the Company’s proposed acquisition of TTI. In response to the concerns presented by the CMA, the Company submitted a remedy proposal, which the CMA rejected on January 18, 2021. As a result of this rejection, the Company concluded that it is not possible to complete the transaction by the Condition Satisfaction Date and elected to terminate the transaction. On January 19, 2021, pursuant to the definitive agreement the $18 million previously placed into escrow was released to Eramet in satisfaction of the termination fee. At December 31, 2020, the $18 million is reflected within "Restricted cash" on the Consolidated Balance Sheet. Our subsequent decision in January 2021 to terminate the transaction and pay the $18 million termination fee did not otherwise impact our 2020 financial statements. Cristal Acquisitions and Related Divestitures On April 10, 2019, we completed the acquisition of the TiO 2 business of Cristal for $1.675 billion of cash, plus 37,580,000 ordinary shares. The total acquisition price, including the value of the ordinary shares at $14 per share on the closing date of the Cristal Transaction, was approximately $2.2 billion. With the acquisition of our shares, an affiliate of Cristal became our largest shareholder. At December 31, 2020, Cristal International Holdings B.V. (formerly known as Cristal Inorganic Chemical Netherlands Cooperatief W.A.), a wholly-owned subsidiary of The National Titanium Dioxide Company Limited., continues to own 37,580,000 shares of Tronox, or a 26% ownership interest. The National Titanium Dioxide Company Limited is 79% owned by Tasnee. In order to obtain regulatory approval for the Cristal Transaction, the FTC required us to divest Cristal's North American TiO 2 business, which we sold to INEOS on May 1, 2019, for cash proceeds, net of transaction costs, of $701 million, inclusive of an amount for a working capital adjustment. The operating results of Cristal’s North American TiO 2 business from the acquisition date to the date of divestiture are included in a single caption entitled “Net Income (Loss) from discontinued operations, net of tax” in our Consolidated Statements of Operations. See Note 6 for further information on discontinued operations. In conjunction with the Cristal Transaction, we entered into a transition services agreement with Tasnee and certain of its affiliates under which we and the Tasnee entities will provide certain transition services to one another. See Note 24 for further details of the transition services agreement. In conjunction with the divestiture of Cristal's North American TiO 2 business to INEOS, we entered into a two-year transition services agreement with INEOS. Under the terms of the transition services agreement, INEOS agreed to provide services to Tronox for manufacturing, technology and innovation, information technology, finance, warehousing and human resources. Similarly, Tronox will provide services to INEOS for information technology, finance, product stewardship, warehousing and human resources. In addition, in order to obtain regulatory approval by the European Commission, we divested the 8120 paper laminate grade, supplied from our Botlek facility in the Netherlands, to Venator Materials PLC (“Venator”). The divestiture was completed on April 26, 2019. Under the terms of the divestiture, we will supply the 8120 grade product to Venator under a supply agreement for an initial term of 2 years, and extendable up to 3 years, to allow for the transfer of the manufacturing of the 8120 grade to Venator. Total cash consideration is 8 million Euros, of which 1 million Euros was paid at the closing and 3.5 million Euros (or approximately $3.9 million) was received during the second quarter of 2020. The remaining 3.5 million Euros (approximately $4.3 million at December 31, 2020 exchange rate) will be paid in the second quarter of 2021. We recorded a charge of $19 million during the second quarter of 2019, in “Contract loss” in the Consolidated Statements of Operations, reflecting both the proceeds on sale and the estimated losses we expect to incur under the supply agreement with Venator. We funded the cash portion of the Cristal Transaction through existing cash, borrowings from our Wells Fargo Revolver, and restricted cash which had been borrowed under the Blocked Term Loan (as defined elsewhere herein) and which became available to us for the purpose of consummating the Cristal Transaction. See Note 15 for further details of the Cristal Transaction financing. Allocation of the Purchase Price For the Cristal Transaction, we have applied the acquisition method of accounting in accordance with ASC 805, "Business Combinations", with respect to the identifiable assets and liabilities of Cristal, which have been measured at estimated fair value as of the date of the business combination. The aggregate purchase price noted above was allocated to the identifiable assets acquired and liabilities assumed based upon their estimated fair values at the acquisition date, primarily using Level 2 and Level 3 inputs (see Note 2 for an explanation of Level 2 and Level 3 inputs). These fair value estimates represent management’s best estimate of future cash flows (including sales, cost of sales, income taxes, etc.), discount rates, competitive trends, market comparables and other factors. Inputs used were generally determined from historical data supplemented by current and anticipated market conditions and growth rates. During the first quarter of 2020, we finalized the purchase price allocation which resulted in increasing environmental liabilities by $8 million, increasing property, plant and equipment by $13 million, decreasing noncontrolling interest by $3 million, decreasing deferred taxes by $6 million, increasing liabilities held for sale by $5 million and decreasing inventory by $4 million, as well as other minor adjustments. The adjustments to the Consolidated Statement of Operations that would have been recognized in the second quarter of 2019 if the measurement period adjustments had been completed as of the acquisition date would have increased the net loss by approximately $1 million. The final purchase price consideration and estimated fair value of Cristal’s net assets acquired on April 10, 2019 are shown below. The assets and liabilities of Cristal's North American TiO 2 business, that was subsequently divested on May 1, 2019, are shown as held for sale in the fair value of assets acquired and liabilities assumed (refer to Note 6). Fair Value Purchase Price Consideration: Tronox Holdings plc shares issued 37,580,000 Tronox Holdings plc closing price per share on April 10, 2019 $ 14.00 Total fair value of Tronox Holdings plc shares issued at acquisition date $ 526 Cash consideration paid $ 1,675 Total Purchase Price $ 2,201 Fair Value Fair Value of Assets Acquired Accounts receivable $ 251 Inventory 689 Deferred taxes 51 Prepaid and other assets 81 Property, plant and equipment 759 Mineral leaseholds 95 Intangible assets 64 Lease right of use assets 40 Other long-term assets 43 Assets held for sale 850 Total assets acquired $ 2,923 Less: Liabilities Assumed Accounts payable $ 102 Accrued liabilities 137 Short-term lease liabilities 13 Deferred tax liabilities 2 Pension and postretirement healthcare benefits 76 Environmental liabilities 72 Asset retirement obligations 75 Long-term debt 22 Long-term lease liabilities 24 Other long-term liabilities 20 Liabilities held for sale 131 Total liabilities assumed $ 674 Less noncontrolling interest 48 Purchase price $ 2,201 Summary of Significant Fair Value Methods The methods used to determine the fair value of significant identifiable assets and liabilities included in the allocation of purchase price are discussed below. Inventory Acquired inventory is comprised of finished goods, work in process and raw materials. The fair value of finished goods was calculated as the estimated selling price, adjusted for costs of the selling effort and a reasonable profit allowance relating to the selling effort. The fair value of work in process inventory was primarily calculated as the estimated selling price, adjusted for estimated costs to complete the manufacturing, estimated costs of the selling effort, as well as a reasonable profit margin on the remaining manufacturing and selling effort. The fair value of raw materials and supplies was determined based on historical carrying value which approximates fair value. The fair value step-up of inventories is being recognized in “Cost of sales” as the inventory is sold. Assets held for sale and Liabilities of assets held for sale As described above, in order to obtain regulatory approval for the acquisition, the U. S. FTC required us to divest Cristal's North American TiO 2 business, which we sold to INEOS on May 1, 2019, for cash proceeds, net of transaction costs, of $701 million. Refer to Note 6 for further information. Property, Plant and Equipment Property, plant and equipment (“PP&E”) is comprised of land and improvements of $92 million; machinery and equipment of $518 million; buildings of $90 million; and construction in progress of $59 million. The estimated fair value for PP&E was primarily determined using a replacement cost approach, although a market approach was used for land and certain types of equipment. The replacement cost approach measures the value of an asset by estimating the cost to acquire or construct comparable assets and adjusts for age and condition of the asset. The market approach represents a sales comparison that measures the value of an asset through an analysis of sales and offerings of comparable assets. Additionally, a discounted cash flow analysis (“Income Approach”) was used to quantify economic obsolescence (“EO”). An EO adjustment was made when the Income Approach indicated that there were insufficient cash flows to support the values established through the market and replacement cost approaches. Mineral Leaseholds The acquired assets of Cristal include mining operations in Australia. The fair value of these assets was determined using the income approach, specifically a discounted cash flow analysis ("DCF"). The DCF includes significant estimates and assumptions with respect to the expected production of the mine over the estimated time period, sales prices, profit margins and the discount rate. The calculated DCF value using this Income Approach was then reduced by the fair values determined for PP&E (see PP&E methodology) in order to derive the fair value of mineral leaseholds. There was no EO required for mining and mineral separation assets. Intangible Assets Intangible assets primarily consist of acquired developed technology. The values of the developed technology were determined utilizing the relief from royalty method, which is a form of Income Approach. Pension and Other Postretirement Liabilities Tronox recognized a pretax net liability representing the unfunded portion of Cristal’s defined-benefit pension and other postretirement benefit ("OPEB") plans. Asset Retirement Obligations Fair value is measured using expected future cash outflows discounted at our credit-adjusted risk-free interest rate. See Notes 2 and 19 to the consolidated financial statements for additional information. Environmental Liabilities Liabilities for environmental matters are recognized when remedial efforts are probable and the costs can be reasonably estimated. Such liabilities are based on our best estimate of the undiscounted future costs required to complete the remedial work. For further discussion, see Notes 2 and 20 to the consolidated financial statements. Deferred Income Tax Assets and Liabilities The deferred income tax assets and liabilities include tax loss carryforwards along with the expected future federal, state and foreign tax consequences associated with temporary differences between the preliminary fair values of the assets acquired and liabilities assumed and the respective tax bases. When applicable, valuation allowances were set up against deferred tax assets not expected to be realized. Tax rates utilized in calculating deferred income taxes represent the enacted statutory tax rates at the effective date of the merger in each respective jurisdiction. Refer to Note 8 for further information. Noncontrolling Interests Noncontrolling interest relates to Cristal’s historic noncontrolling interest in its publicly-traded Brazilian subsidiary. The fair value was calculated as a percentage of the fair value balance sheet of Cristal’s Brazilian subsidiary, which approximated the market capitalization of the subsidiary’s stock on the Brazilian stock exchange. Other Assets Acquired and Liabilities Assumed We utilized the carrying values, net of allowances, to value accounts receivable and accounts payable as well as other current assets and liabilities as it was determined that carrying values represented the fair value of those items at the acquisition date. Supplemental Pro Forma Financial Information The following unaudited pro forma information gives effect to the Cristal Transaction as if it had occurred on January 1, 2018. The unaudited pro forma financial information reflects certain adjustments related to the acquisition, such as: a. conforming the accounting policies of Cristal to those applied by Tronox; b. conversion to U.S. GAAP from IFRS for Cristal; c. the elimination of transactions between Tronox and Cristal; d. recording certain incremental expenses resulting from purchase accounting adjustments, such as inventory step-up amortization, depreciation, depletion and amortization expense in connection with fair value adjustments to property, plant and equipment, mineral leaseholds and intangible assets; e. recording the contract loss on the sale of the 8120 product line as a charge in the first quarter of 2018; f. recording all transaction costs incurred in the first quarter of 2018; g. recording the effect on interest expense related to borrowings in connection with the Cristal Transaction; and h. recording the related tax effects and the impacts to EPS for the shares issued in conjunction with the transaction. The unaudited pro forma financial information should not be relied upon as being indicative of the historical results that would have been obtained if the Cristal Transaction had actually occurred on that date, nor the results of operations in the future. In accordance with ASC 805, the supplemental pro forma results of operations for the years ended December 31, 2019 and 2018, as if the Cristal Transaction had occurred on January 1, 2018, are as follows: Year Ended December 31 2019 2018 Net Sales $ 3,008 $ 3,339 Net income from continuing operations attributable to Tronox Holdings plc $ 18 $ 32

Restructuring Initiatives

Restructuring Initiatives	12 Months Ended
	Dec. 31, 2020
Restructuring and Related Activities [Abstract]
Restructuring Initiatives	Restructuring Initiatives In April 2019, we announced the completion of the Cristal Transaction. During the second quarter of 2019, as a result of the acquisition, we outlined a broad-based synergy savings program that is expected to reduce costs, simplify processes and focus the organization’s structure and resources on key growth initiatives. During the years ended December 31, 2020 and 2019, we recorded costs of $3 million and $22 million, respectively, in our Consolidated Statement of Operations relating to these initiatives. The costs consisted of charges for employee-related costs, including severance. The liability balance for restructuring as of December 31, 2020 and 2019, which is recorded within “Accrued liabilities” in the Consolidated Balance Sheet, is as follows: Employee-Related Costs Balance, January 1, 2019 $ — Charges 22 Cash payments (12) Balance, December 31, 2019 $ 10 Charges 3 Cash payments (11) Balance, December 31, 2020 $ 2

Revenue

Revenue	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Revenue	Revenue Nature of Contracts and Performance Obligations We primarily generate revenue from selling TiO 2 pigment products, products derived from titanium bearing mineral sands and related co-products, primarily zircon and pig iron, to our customers. These products are used for the manufacture of paints, coatings, plastics, paper, and a wide range of other applications. We account for a contract with our customer when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance, and collectability of consideration is probable. Our promise in a contract typically relates to the transferring of a product or multiple distinct products that are substantially the same and that have the same pattern of transfer, representing a single performance obligation within a contract. We have elected to account for shipping and handling activities that occur after control of the products has transferred to the customer as contract fulfillment activities, rather than a separate performance obligation. Amounts billed to a customer in a sales transaction related to shipping and handling activities continue to be reported as “Net sales” and related costs as “Cost of goods sold” in the Consolidated Statements of Operations. The duration of our contract period is one year or less. As such, we have elected to recognize incremental costs incurred to obtain contracts, which primarily consist of commissions paid to third-party sales agents, as “Selling, general and administrative expenses” in the Consolidated Statements of Operations. Furthermore, we have elected not to disclose the value of unsatisfied performance obligations at each period end, given the original expected duration of our contracts are one year or less. Transaction Price Revenue is measured as the amount of consideration that we expect to be entitled in exchange for transferring products to the customer. The transaction price typically consists of fixed cash consideration. We also offer various incentive programs to our customers, such as rebates, discounts, and other price adjustments that represent variable consideration. We estimate variable consideration and include such consideration amounts in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Our estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of our anticipated performance and all information (historical, current and forecasted) that is reasonably available to us. We adjust our estimate of revenue at the earlier of when the amount of consideration we expect to receive changes or when the consideration becomes fixed. Sales returns rarely happen in our business, therefore it is unlikely that a significant reversal of revenue will occur. Sales and similar taxes we collect on behalf of governmental authorities are excluded from the transaction price for the determination of revenue. The expected costs associated with product warranties continue to be recognized as expense when the products are sold. Customer payment terms and conditions vary by contract and customer, although the timing of revenue recognition typically does not differ from the timing of invoicing. Additionally, as we generally do not grant extended payment terms, we have determined that our contracts generally do not include a significant financing component. Revenue Recognition We recognize revenue at a point in time when the customer obtains control of the promised products. For most transactions this occurs when products are shipped from our manufacturing facilities or at a later point when control of the products transfers to the customer at a specified destination or time. Contract Balances Contract assets represent our rights to consideration in exchange for products that have transferred to a customer when the right is conditional on situations other than the passage of time. For products that we have transferred to our customers, our rights to the consideration are typically unconditional and only the passage of time is required before payments become due. These unconditional rights are recorded as accounts receivable. As of December 31, 2020, and December 31, 2019, we did not have material contract asset balances. Contract liabilities represent our obligations to transfer products to a customer for which we have received consideration from the customer. Infrequently we may receive advance payment from our customers that is accounted for as deferred revenue. Deferred revenue is earned when control of the product transfers to the customer, which is typically within a short period of time from when we received the advanced payment. Contract liability balances as of December 31, 2020 and December 31, 2019 were $4 million and $1 million, respectively. Contract liability balances were reported as “Accounts payable” in the Consolidated Balance Sheets. All contract liabilities as of December 31, 2019 and 2018 were recognized as revenue in “Net sales” in the Consolidated Statements of Operations during the first quarter of 2020 and first quarter of 2019, respectively. Disaggregation of Revenue We operate under one operating and reportable segment, Tronox. See Note 25 for details. We disaggregate our revenue from contracts with customers by product type and geographic area. We believe this level of disaggregation appropriately depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors and reflects how our business is managed. Net sales to external customers by geographic areas where our customers are located were as follows: Year Ended December 31, 2020 2019 2018 North America $ 794 $ 696 $ 649 South and Central America 315 164 72 Europe, Middle-East and Africa 879 954 541 Asia Pacific 770 828 557 Total net sales $ 2,758 $ 2,642 $ 1,819 Net sales from external customers for each similar type of product were as follows: Year Ended December 31, 2020 2019 2018 TiO 2 $ 2,176 $ 2,049 $ 1,230 Zircon 283 290 293 Feedstock and other products 299 303 259 Electrolytic — — 37 Total net sales $ 2,758 $ 2,642 $ 1,819 Feedstock and other products mainly include pig iron, rutile prime, ilmenite, chloride slag and other mining products. Electrolytic products mainly include electrolytic manganese dioxide and boron. We sold our Electrolytic operations on September 1, 2018. See Note 6. The nature, amount, timing and uncertainty of revenue and cash flows typically do not differ significantly among different products.

Discontinued Operations and Oth

Discontinued Operations and Other Disposition	12 Months Ended
	Dec. 31, 2020
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations and Other Disposition	Discontinued Operations and Other Disposition Discontinued Operations - 2019 As discussed in Note 3, the Company divested Cristal's North American TiO 2 business to INEOS on May 1, 2019, for cash proceeds, net of transaction costs, of $701 million, inclusive of an amount for a working capital adjustment. The operating results of Cristal’s North American TiO 2 business from the acquisition date to the date of divestiture are included in a single caption entitled “Net income (loss) from discontinued operations, net of tax” in our Consolidated Statements of Operations and is included in the table below. The following table presents a summary of the operations of Cristal’s North American TiO 2 business and Cristal Metals line items constituting the "Income from discontinued operations, net of tax" in our Consolidated Statements of Operations for the year ended December 31, 2019. There were no discontinued operations in 2020 and 2018. Year ended December 31, 2019 Net sales $ 41 Cost of goods sold 29 Gross profit 12 Selling, general and administrative expense and other expenses 5 Income before income taxes 7 Income tax provision 2 Income from discontinued operations, net of tax $ 5 Other Disposition - 2018 On September 1, 2018, Tronox LLC, our indirect wholly-owned subsidiary, sold to EMD Acquisition LLC certain of the assets and liabilities of our Henderson Electrolytic Operations based in Henderson, Nevada (the “Henderson Electrolytic Operations”), a component of our TiO 2 segment, for $1.3 million in cash and a Secured Promissory Note of $4.7 million. On December 27, 2018, we received the full settlement of the Promissory Note of $4.7 million from EMD Acquisition LLC. For the year ended December 31, 2018, a total pre-tax loss on the sale of $31 million was recorded in “Impairment loss” in the Consolidated Statements of Operations.

Other Income (Expense), Net

Other Income (Expense), Net	12 Months Ended
	Dec. 31, 2020
Other Income and Expenses [Abstract]
Other Income (Expense), Net	Other Income (Expense), Net Other income (expense), net is comprised of the following: Year Ended December 31, 2020 2019 2018 Net realized and unrealized foreign currency gains (losses) $ 4 $ 5 $ 29 Pension and postretirement benefit interest cost, expected return on assets and amortization of actuarial losses 1 (1) (2) Pension and postretirement benefit settlement and curtailment gains (1) 2 1 3 Insurance proceeds (2) 11 — — AMIC technical service support fee (Note 24) 5 — — Other, net 3 (2) 3 Total $ 26 $ 3 $ 33 _____________________ (1) 2020 and 2019 amounts are curtailment gains related to our former U.S. Pension Plan (acquired as part of the Cristal Transaction). 2018 gain relates to our former U.S. retiree medical plan. See Note 23. (2) 2020 amount represents reimbursement from claims related to the Ginkgo concentrator failure we inherited as a part of the Cristal Transaction.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our operations are conducted through various subsidiaries in a number of countries throughout the world. We have provided for income taxes based upon the tax laws and rates in the countries in which operations are conducted and income is earned. Income (loss) from continuing operations before income taxes is comprised of the following: Year Ended December 31, 2020 2019 2018 United Kingdom $ (12) $ 56 $ (122) International 126 (144) 165 Income (loss) from continuing operations before income taxes $ 114 $ (88) $ 43 The income tax (provision) benefit is summarized below: Year Ended December 31, 2020 2019 2018 United Kingdom: Current $ (1) $ — $ (1) Deferred (10) 11 3 International: Current (17) (23) (33) Deferred 909 (2) 18 Income tax (provision) benefit $ 881 $ (14) $ (13) The following table reconciles the applicable statutory income tax rates to our effective income tax rates for “Income tax (provision) benefit” as reflected in the Consolidated Statements of Operations. Year Ended December 31, 2020 2019 2018 Statutory tax rate 19 % 19 % 19 % Increases (decreases) resulting from: Tax rate differences 10 5 24 Disallowable expenditures 17 (29) 88 Valuation allowances (849) (44) (474) Corporate Reorganization (97) — — Tax rate changes (9) 17 41 State and local taxes 5 (7) 8 Prior year accruals 131 24 368 Branch taxation — (1) (37) Deferred gross margin — (4) (9) Other, net — 4 2 Effective tax rate (773) % (16) % 30 % Tronox Holdings plc, a U.K. public limited company, became the public parent during the three months ended March 31, 2019. Prior to that time, Tronox Limited, was the public parent, registered under the laws of the State of Western Australia, but managed and controlled in the U.K. The statutory tax rate in the U.K. at December 31, 2020, 2019 and 2018 was 19%. The large negative effective tax rate for 2020 is caused by the release of valuation allowances for deferred tax assets in the U.S. and Brazil, partially offset by the recording of valuation allowances in Saudi Arabia and the U.K. The 2020 rate is additionally impacted by a corporate reorganization related to our Australian entities and the amendment of prior year returns in resolution of a tax audit which impacted prior year accruals (see below for further discussion regarding the audit agreement). Both of these impacts are fully offset by valuation allowances. The effective tax rates in 2020, 2019 and 2018 are all influenced by a variety of factors, primarily income and losses in jurisdictions with full valuation allowances, changes in tax rates, disallowable expenditures, and rates different than the United Kingdom statutory rate of 19%. The 2018 rate was additionally impacted by a benefit of $48 million due to the release of a valuation allowance for deferred tax assets associated with our operating subsidiary in the Netherlands. The Company reached a settlement agreement with the Australian Tax Office (“ATO”) on November 26, 2018 for the tax years 2012 through 2015 related to the Tronox companies operating in Australia, which were under examination by the ATO. This settlement resulted in the accrual of an $11 million current tax provision and the loss of $154 million in deferred tax assets related to Australian net operating losses (“NOLs”). The change to deferred taxes is fully offset by a valuation allowance and results in no impact to the consolidated provision. The settlement of $11 million was paid to the ATO in December 2018. Both the current tax provision and NOL adjustment from the ATO settlement are reflected in the "Prior year accruals" line of the effective tax rate table. The Company reached an agreement with the ATO during the year ended December 31, 2020 for the tax years 2016 through 2019 related to the companies operating in Australia acquired in the Cristal Transaction, which were under examination by the ATO. Cash tax payments to be made pursuant to this agreement are not reflected in the above table due to the indemnification clause of the Cristal Transaction purchase contract. Refer to Note 24 for further information. As part of the agreement, $79 million in deferred tax assets related to Australian NOLs were lost. The change to deferred taxes is fully offset by a valuation allowance and results in no impact to the consolidated provision. The NOL adjustment from the ATO agreement is reflected in the "Prior year accruals" line of the effective tax rate table. Changes in our state apportionment factors and state statutory rate changes caused our overall effective state tax rates to change. Due to the large deferred tax asset created by the Anadarko litigation settlement in 2014, these state rate changes have a material impact on deferred taxes for 2018, 2019, and 2020. These are reflected within the Tax rate changes line above. The changes to deferred tax are offset by valuation allowances for 2018 and 2019. During 2018, this line also includes the deferred tax impacts of tax rate reductions enacted in the Netherlands and the U.K. During 2020 and 2019, tax law changes fully repealed the future Netherlands rate reduction, and this benefit is also reflected in the Tax rate changes line. Net deferred tax assets (liabilities) at December 31, 2020 and 2019 were comprised of the following: December 31, 2020 2019 Deferred tax assets: Net operating loss and other carryforwards $ 1,788 $ 1,899 Property, plant and equipment, net 153 115 Reserves for environmental remediation and restoration 46 45 Obligations for pension and other employee benefits 57 58 Investments 3 28 Grantor trusts 637 615 Inventories, net 8 10 Interest 232 243 Lease liabilities 21 27 Other accrued liabilities 6 10 Foreign exchange 1 — Other 8 11 Total deferred tax assets 2,960 3,061 Valuation allowance associated with deferred tax assets (1,826) (2,791) Net deferred tax assets 1,134 270 Deferred tax liabilities: Inventories, net (2) (6) Property, plant and equipment, net (226) (242) Intangible assets, net (30) (45) Lease assets (22) (28) Foreign exchange — (9) Other (10) (14) Total deferred tax liabilities (290) (344) Net deferred tax liability $ 844 $ (74) Balance sheet classifications: Deferred tax assets — long-term $ 1,020 $ 110 Deferred tax liabilities — long-term $ (176) $ (184) Net deferred tax liability $ 844 $ (74) For the year ended December 31, 2019, the application of business combination accounting for the Cristal Transaction resulted in the remeasurement of deferred income taxes associated with the assets and liabilities of the acquired entities at fair value pursuant to ASC 805. As a result, net deferred tax assets of $49 million were recorded in accordance with ASC 740. Significant changes by category impacted by the acquisition were related to net operating loss and other carryforwards of $186 million, Property, plant, and equipment of $49 million, and Reserves for environmental remediation and restoration of $23 million under deferred tax assets and to Property, plant and equipment of ($49) million and Inventories of ($30) million under deferred tax liabilities in the above table. Acquired companies in certain jurisdictions also included valuation allowances in Australia, Brazil, Switzerland, and the United Kingdom of ($123) million of the value in the above table. The net deferred tax liabilities reflected in the above table include deferred tax assets related to grantor trusts, which were established as Tronox Incorporated emerged from bankruptcy during 2011. The balances relate to the assets contributed to such grantor trusts by Tronox Incorporated and the proceeds from the resolution of previous litigation of $5.2 billion during 2014, which resulted in additional deferred tax assets of $2.0 billion. This increase was initially offset by valuation allowances. As the grantor trusts continue to spend funds received from the litigation and earn income from the investment of those funds, the U.S. net operating loss will increase or decrease. There was a decrease to our valuation allowance of $965 million during 2020, an increase of $172 million in 2019, and a decrease of $205 million in 2018. The table below sets forth the changes, by jurisdiction: December 31, 2020 2019 2018 United Kingdom $ (1) $ (2) $ 8 United States (944) 54 (12) Australia (17) 89 (144) The Netherlands 2 — (57) Saudi Arabia 11 — — Brazil (14) 14 — Switzerland — 15 — Belgium (2) 2 — Total (decrease) increase in valuation allowances $ (965) $ 172 $ (205) As part of the functions under business combination accounting pursuant to ASC 805 and deferred income taxes in accordance with ASC 740, the Company evaluated deferred tax attributes in each jurisdiction for application of a valuation allowance. Some operations acquired in the Cristal Transaction included a full or partial valuation allowance at the time of acquisition. Evidence provided to the Company that was maintained previously to support valuation allowances at acquisition was used along with considerations of any changes in operations and possible combinations with deferred tax attributes of the Company’s existing operations in each jurisdiction. It was determined that France would remove its valuation allowance so that jurisdiction is not shown in the table above, Australia and Brazil would increase from partial to full valuation allowances, and Switzerland and the United States would sustain full valuation allowances at acquisition. During the year ended December 31, 2020, we determined sufficient positive evidence existed to reverse a portion of the valuation allowance attributable to the deferred tax assets associated with our operations in the U.S. This reversal resulted in a non-cash deferred tax benefit of $909 million. Our analysis considered all positive and negative evidence, including (i) three years of cumulative income for our U.S. subsidiaries, (ii) our continuing and improved profitability over the last twelve months in this jurisdiction, (iii) estimates of continued profitability based on updates to our latest forecasts, (iv) changes in the factors that drove losses in the past, primarily interest expenses incurred in the U.S., and (v) risk that certain deferred tax assets may be subject to limitation under Section 382 of the Code. Based on this analysis, we concluded that it was more likely than not that our U.S. subsidiaries will be able to utilize all of their deferred tax assets with an indefinite life. A portion of the U.S. deferred tax assets are attributable to NOLs incurred in prior years which are subject to expiration in future years. Our analysis did not support that these limited-life NOLs would be utilized before their expiration, and it is against these deferred tax assets in the U.S. that the Company continues to carry a valuation allowance with a current estimated value of $1,044 million. During the year ended December 31, 2020, we also determined sufficient positive evidence existed to reverse the valuation allowance attributable to the deferred tax assets associated with our operations in Brazil. This reversal resulted in a non-cash deferred tax benefit of $8 million. Our analysis considered all positive and negative evidence, the most significant of which was the continuing and improved profitability of the Brazilian company subsequent to its acquisition in 2019 and estimates of continued profitability based on updates to our latest forecasts. Based on this analysis, we concluded that it is more likely than not that our Brazilian subsidiary will be able to utilize all of its deferred tax assets. During the year ended December 31, 2020, we established a valuation allowance against the net deferred tax assets in the United Kingdom. The addition of this valuation allowance resulted in a non-cash deferred tax provision of $10 million. There has been increased profitability in this jurisdiction after the Cristal Transaction; however, it has not yet been sufficient to overcome our cumulative historical losses. Forecasted changes to intercompany interest is recent negative evidence now impacting our analysis. The company expects continued profitability in this jurisdiction but no longer has objective support which can be heavily weighted in this determination. During the year ended December 31, 2020, we established a valuation allowance against the net deferred tax assets in Saudi Arabia. The addition of this valuation allowance resulted in a non-cash deferred tax provision of $2 million. We released the valuation allowance of the operating entity in the Netherlands in 2018. During the period ended June 30, 2018, the Company had accumulated enough objective positive evidence to support the prospective use of its deferred tax assets held by the operating entity in the Netherlands. The valuation allowance in Australia decreased following the Company’s settlement which reduced its prior year NOLs. This was partially offset by current year losses in Australia. At December 31, 2020, we have full valuation allowances related to the total net deferred tax assets in Australia, Switzerland, and the United Kingdom, as we cannot objectively assert that these deferred tax assets are more likely than not to be realized. It is reasonably possible that a portion of these valuation allowances could be reversed within the next year due to increased book profitability levels. Future provisions for income taxes will include no tax benefits with respect to losses incurred and tax expense only to the extent of current tax payments until the valuation allowances are eliminated. Additionally, we have valuation allowances against specific tax assets in the Netherlands, South Africa, and the U.S. These conclusions were reached by the application of ASC 740, Income Taxes , and require that all available positive and negative evidence be weighted to determine whether a valuation allowance should be recorded. The more significant evidential matter in Australia, the Netherlands, Switzerland, and the United Kingdom relates to cumulative book losses. The most significant evidential matter for South Africa relates to capital losses and assets that cannot be depleted or depreciated for tax purposes. An ownership change occurred during 2019 for the Cristal U.S. businesses as a result of the acquisition by the Company. These ownership changes resulted in a limitation under Sections 382 and 383 of the Internal Revenue Code related to the net operating losses of the Cristal U.S. businesses. The net limitations related to the ownership change resulted in a reduction of $69 million of the acquired U.S. loss carryforward, offset by corresponding reduction to a valuation allowance. The Company did not have any transactions during 2019 that triggered an ownership change under Sections 382 and 383 of the Code for the Tronox U.S. businesses. The deferred tax assets generated by tax loss carryforwards in Australia, Switzerland, and the United Kingdom have been fully offset by valuation allowances. In the United States, the deferred tax assets generate by tax loss carryforwards are partially offset by a valuation allowance to the extent they are subject to expiration. The expiration of these carryforwards at December 31, 2020 is shown below. The Australian, Saudi Arabian, French, Brazilian and United Kingdom tax loss carryforwards do not expire. 2021 2022 2023 2024 2025 2026 - 2039 Unlimited Total Tax Loss Carryforwards United Kingdom $ — $ — $ — $ — $ — $ — $ (62) $ (62) Australia — — — — — — (358) (358) The Netherlands (8) (35) (39) (19) (26) (131) — (258) France — — — — — — (242) (242) Saudi Arabia — — — — — — (37) (37) Switzerland — (101) (80) — — — — (181) U.S. Federal — — — — — (4,082) (320) (4,402) U.S. State (3) (3) (25) (12) (41) (4,073) (18) (4,175) Other — — — — — — (7) (7) Total tax loss carryforwards $ (11) $ (139) $ (144) $ (31) $ (67) $ (8,286) $ (1,044) $ (9,722) At December 31, 2020, Tronox Holdings plc had foreign subsidiaries with undistributed earnings. Although we would not be subject to income tax on these earnings, amounts totaling $266 million could be subject to withholding tax if distributed. We have made no provision for deferred taxes for Tronox Holdings plc related to these undistributed earnings because they are considered to be indefinitely reinvested outside of the parents’ taxing jurisdictions. The noncurrent liabilities section of our Consolidated Balance Sheet does not reflect any reserves for uncertain tax positions for either 2020 or 2019. Our Chinese returns are closed through 2014. Our Australian, South African, and Brazilian returns are closed through 2015. Our U.K. and U.S. returns are closed through 2016. Our Netherlands and French returns are closed through 2017. We believe that we have made adequate provision for income taxes that may be payable with respect to years open for examination; however, the ultimate outcome is not presently known and, accordingly, additional provisions may be necessary and/or reclassifications of noncurrent tax liabilities to current may occur in the future.

Income (Loss) Per Share

Income (Loss) Per Share	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Income (Loss) Per Share	Income (Loss) Per Share The computation of basic and diluted income per share for the periods indicated is as follows: Year Ended December 31, 2020 2019 2018 Numerator – Basic and Diluted: Net income (loss) from continuing operations $ 995 $ (102) $ 30 Less: Net income from continuing operations attributable to noncontrolling interest 26 12 37 Undistributed net income (loss) from continuing operations attributable to Tronox Holdings plc 969 (114) (7) Net income from discontinued operations available to ordinary shares — 5 — Net income (loss) available to ordinary shares $ 969 $ (109) $ (7) Denominator – Basic and Diluted: Weighted-average ordinary shares, basic (in thousands) 143,355 139,859 122,881 Weighted-average ordinary shares, diluted (in thousands) 144,906 139,859 122,881 Net income (loss) per Ordinary Share: Basic net income (loss) from continuing operations per ordinary share $ 6.76 $ (0.81) $ (0.06) Basic net income (loss) from discontinued operations per ordinary share — 0.03 — Basic net income (loss) per ordinary share $ 6.76 $ (0.78) $ (0.06) Diluted net income (loss) from continuing operations per ordinary share $ 6.69 $ (0.81) $ (0.06) Diluted net income (loss) from discontinued operations per ordinary share — 0.03 — Diluted net income (loss) per ordinary share $ 6.69 $ (0.78) $ (0.06) Net income per ordinary share amounts were calculated from exact, unrounded net loss and share information. Prior to January 2019, we had issued shares of restricted stock which were participating securities that did not have a contractual obligation to share in losses; therefore, when we have a net loss, none of the loss is allocated to these participating securities. The restricted stock vested on January 29, 2019. Consequently, for the years ended December 31, 2020, 2019 and 2018, the two-class method did not have an effect on our net loss per ordinary share calculation, and as such, dividends paid during these periods did not impact this calculation. In computing diluted net income per share under the two-class method, we considered potentially dilutive shares. Anti-dilutive shares not recognized in the diluted net income per share calculation for the years ended December 31, 2020, 2019 and 2018 were as follows: Shares 2020 2019 2018 Options 1,201,891 1,260,902 1,319,743 Restricted share units 1,054,994 5,557,659 5,336,433 Series A and Series B Warrants expired on February 14, 2018.

Inventories, net

Inventories, net	12 Months Ended
	Dec. 31, 2020
Inventory Disclosure [Abstract]
Inventories, net	Inventories, net Inventories, net consisted of the following: December 31, 2020 2019 Raw materials $ 170 $ 205 Work-in-process 103 129 Finished goods, net 668 573 Materials and supplies, net 196 224 Inventories, net - current $ 1,137 $ 1,131 Materials and supplies, net consists of processing chemicals, maintenance supplies, and spare parts, which will be consumed directly and indirectly in the production of our products. At December 31, 2020 and 2019, inventory obsolescence reserves were $41 million and $39 million, respectively. At December 31, 2020 and December 31, 2019, reserves for lower of cost and net realizable value were $29 million and $25 million, respectively.

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment, net of accumulated depreciation, consisted of the following: December 31, 2020 2019 Land and land improvements $ 189 $ 191 Buildings 368 340 Machinery and equipment 2,197 2,028 Construction-in-progress 192 156 Other 86 54 Total 3,032 2,769 Less: accumulated depreciation (1,273) (1,007) Property, plant and equipment, net $ 1,759 $ 1,762 Substantially all the Property, plant and equipment, net is pledged as collateral for our debt. See Note 15. The table below summarizes depreciation expense related to property, plant and equipment for the periods presented, recorded in the specific line items in our Consolidated Statements of Operations: Year Ended December 31, 2020 2019 2018 Cost of goods sold $ 233 $ 189 $ 131 Selling, general and administrative expenses 5 5 3 Total $ 238 $ 194 $ 134

Mineral Leaseholds, net

Mineral Leaseholds, net	12 Months Ended
	Dec. 31, 2020
Extractive Industries [Abstract]
Mineral Leaseholds, net	Mineral Leaseholds, net Mineral leaseholds, net of accumulated depletion, consisted of the following: December 31, 2020 2019 Mineral leaseholds $ 1,333 $ 1,352 Less accumulated depletion (530) (500) Mineral leaseholds, net $ 803 $ 852 Depletion expense related to mineral leaseholds during 2020, 2019, and 2018 was $33 million, $56 million, and $35 million, respectively, and was recorded in “Cost of goods sold” in the Consolidated Statements of Operations.

Intangible Assets, net

Intangible Assets, net	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets, net	Intangible Assets, net Intangible Assets, net of accumulated amortization, consisted of the following: December 31, 2020 December 31, 2019 Gross Cost Accumulated Amortization Net Carrying Amount Gross Cost Accumulated Amortization Net Carrying Amount Customer relationships $ 291 $ (193) $ 98 $ 291 $ (173) $ 118 TiO 2 technology 93 (24) 69 92 (17) 75 Internal-use software and other 73 (39) 34 49 (34) 15 Intangible assets, net $ 457 $ (256) $ 201 $ 432 $ (224) $ 208 As of December 31, 2020, internal-use software included approximately $19 million of capitalized software costs which are not being amortized as the software is not ready for its intended use. The table below summarizes amortization expense related to intangible assets for the periods presented, recorded in the specific line items in our Consolidated Statements of Operations: Year Ended December 31, 2020 2019 2018 Cost of goods sold $ 2 $ 2 $ 1 Selling, general and administrative expenses 31 28 25 Total $ 33 $ 30 $ 26 Estimated future amortization expense related to intangible assets is $35 million for 2021, $36 million for 2022, $33 million for 2023, $32 million for 2024, $26 million for 2025 and $39 million thereafter.

Balance Sheet and Cash Flows Su

Balance Sheet and Cash Flows Supplemental Information	12 Months Ended
	Dec. 31, 2020
Payables and Accruals [Abstract]
Balance Sheet and Cash Flows Supplemental Information	Balance Sheet and Cash Flows Supplemental Information Accrued liabilities consisted of the following: December 31, 2020 2019 Employee-related costs and benefits $ 133 $ 103 Related party payables 7 7 Interest 21 16 Sales rebates 43 39 Restructuring 2 10 Taxes other than income taxes 16 6 Asset retirement obligations 9 16 Interest rate swaps 57 22 Professional fees and other 62 60 Liabilities held for sale — 4 Accrued liabilities $ 350 $ 283 Additional supplemental cash flow information for the year ended December 31, 2020 and 2019 and as of December 31, 2020 and December 31, 2019 is as follows: Year Ended December 31, Supplemental non cash information: 2020 2019 Investing activities- shares issued in the Cristal Transaction $ — $ 526 Financing activities- debt assumed in the Cristal Transaction $ — $ 22 Investing activities - Acquisition of MGT assets $ 36 $ — Financing activities - debt assumed in the acquisition of MGT assets $ 36 $ — December 31, 2020 December 31, 2019 Capital expenditures acquired but not yet paid $ 37 $ 23

Debt

Debt	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Debt	Debt Long-term Debt Long-term debt, net of an unamortized discount and debt issuance costs, consisted of the following: Original Annual Maturity December 31, December 31, Term Loan Facility, net of unamortized discount (1) $ 2,150 Variable 9/22/2024 $ 1,607 $ 1,805 Senior Notes due 2025 450 5.75 % 10/1/2025 450 450 Senior Notes due 2026 615 6.50 % 4/15/2026 615 615 6.5% Senior Secured Notes due 2025 500 6.50 % 5/1/2025 500 — Standard Bank Term Loan Facility (1) 222 Variable 3/25/2024 115 158 Tikon Loan N/A Variable 5/23/2021 17 16 Australian Government Loan, net of unamortized discount N/A N/A 12/31/2036 1 1 MGT Loan (2) 36 Variable Refer below 36 — Finance leases 15 15 Long-term debt 3,356 3,060 Less: Long-term debt due within one year (58) (38) Debt issuance costs (35) (34) Long-term debt, net $ 3,263 $ 2,988 (1) The average effective interest rate, including impacts of our interest rate swap, for the Term Loan Facility was 4.6% and 5.6% for the years ended December 31, 2020 and 2019, respectively. The average effective interest rate on the Standard Bank Term Loan Facility was 7.8% and 9.7% for the year ended December 31, 2020 and 2019, respectively. (2) The MGT loan is a related party debt facility. Refer below for further details. At December 31, 2020, the scheduled maturities of our long-term debt were as follows: Total Borrowings 2021 58 2022 44 2023 44 2024 1,631 2025 959 Thereafter 629 Total 3,365 Remaining accretion associated with the Term Loan Facility and Australian Government Loan (9) Total borrowings 3,356 Term Loan Facility On September 22, 2017, we entered into a new senior secured first lien term loan facility (the “Term Loan Facility”) with the lenders party thereto and Bank of America, N.A., as administrative agent, with a maturity date of September 22, 2024. The Term Loan Facility consists of (i) a U.S. dollar term facility in an aggregate principal amount of $1.5 billion (the “Term Loans”) with our subsidiary, Tronox Finance LLC (“Tronox Finance”) as the borrower and (ii) a U.S. dollar term facility in an aggregate principal amount of $650 million (the “Blocked Term Loan”) with our unrestricted subsidiary, Tronox Blocked Borrower LLC (the “Blocked Borrower”) as the borrower, which Blocked Term Loan was funded into a blocked account. Upon consummation of the Cristal Transaction on April 10, 2019, the Blocked Borrower merged with and into Tronox Finance, and the Blocked Term Loan became available to Tronox Finance. Pursuant to the terms of the Term Loan Facility in the event of an asset sale, some or all of the net proceeds from the sale may be required to be used to prepay borrowings under the Term Loan Facility based on the ratio of the total combined debt outstanding under the Term Loan Facility and the Wells Fargo Revolver to the consolidated EBITDA for the previous four quarters, as defined in the Term Loan Facility (the "First Lien Net Leverage Ratio"). If this ratio is greater than three, then all of the net proceeds from an asset sale would be required to be used to prepay borrowings under the Term Loan Facility, while if the ratio were less than three but greater than 2.75, 50% of the net proceeds would be required for prepayment and if the ratio were less than 2.75, no prepayment would be required. On May 1, 2019, we divested Cristal’s North American operations for approximately $701 million and subsequent to the sale, our First Lien Net Leverage Ratio was below 2.75, and, as a result, the sale of the North American operations did not trigger a prepayment event. The Term Loan Facility bears interest at the “Applicable Rate” defined by reference to a grid-pricing matrix that relates to our First Lien Net Leverage Ratio. Based upon our First Lien Net Leverage Ratio the Applicable Rate under the Term Loan Facility as of December 31, 2020 was LIBOR plus a margin of 3.0%. The Term Loan Facility was issued net of an original issue discount of $11 million. On February 25, 2019, we entered into an amendment to both our Term Loan Facility and Wells Fargo Revolver (as defined below). The purpose of each amendment was to make certain of our U.K. subsidiaries restricted subsidiaries, update the relevant indebtedness disclosure schedules to include certain inter-company indebtedness that had been in existence prior to the execution of each such facility, and waive an administrative omission under such facility. As a result of this amendment, the Company made two mandatory principal prepayments on the Term Loan Facility as follows: 1) $95 million subsequent to the issuance of the Standard Bank Term Loan Facility in March 2019 and 2) $100 million subsequent to the divestiture of the Cristal North American TiO 2 business. The Company accounted for both of these mandatory principal prepayments as debt modifications in accordance with ASC 470. Additionally, in December 2019, the Company made a voluntary prepayment of $100 million on the Term Loan Facility. As a result of the voluntary prepayment, we recorded $1 million in “Loss on extinguishment of debt” within the Consolidated Statement of Operations for the year ended December 31, 2019. No prepayment penalties were required as a result of these principal prepayments. In December 2020, the Company made a voluntary prepayment of $200 million on the Term Loan Facility. As a result of the voluntary prepayment, we recorded $2 million in "Loss on extinguishment of debt" within the Consolidated Statement of Operations for the year ended December 31, 2020. No prepayment penalties were required as a result of this principal prepayment. Senior Notes due 2025 On September 22, 2017, Tronox Finance plc, issued 5.75% senior notes due 2025 for an aggregate principal amount of $450 million (the “Senior Notes due 2025”), which notes were issued under an indenture dated September 22, 2017 (the “2025 Indenture”). The 2025 Indenture and the Senior Notes due 2025 provide among other things, that the Senior Notes due 2025 are senior unsecured obligations of Tronox Finance plc and are guaranteed on a senior and unsecured basis by us and certain of our other subsidiaries. The Senior Notes due 2025 have not been registered under the Securities Act, and may not be offered or sold in the U.S. absent registration or an applicable exemption from registration requirements. Interest is payable on April 1 and October 1 of each year beginning on April 1, 2018 until their maturity date of October 1, 2025. The terms of the 2025 Indenture, among other things, limit, in certain circumstances, the ability of us and certain of our subsidiaries to: incur secured indebtedness, engage in certain sale-leaseback transactions and merge, consolidate or sell substantially all of our assets. The terms of the 2025 Indenture also include certain limitations on our non-guarantor subsidiaries incurring indebtedness. Senior Notes due 2026 On April 6, 2018, Tronox Incorporated issued 6.5% Senior Notes due 2026 for an aggregate principal amount of $615 million (“Senior Notes due 2026”). The 2026 Indenture and the Senior Notes due 2026 provide, among other things, that the Senior Notes due 2026 are senior unsecured obligations of Tronox Incorporated and are guaranteed on a senior and unsecured basis by us and certain of our other subsidiaries. The Senior Notes due 2026 have not been registered under the Securities Act and may not be offered or sold in the U.S. absent registration or an applicable exemption from registration requirements. Interest is payable on April 15 and October 15 of each year beginning on October 15, 2018 until their maturity date of April 15, 2026. The terms of the 2026 Indenture, among other things, limit, in certain circumstances, our and certain of our subsidiaries ability to: incur secured indebtedness; engage in certain sale-leaseback transactions; and merge, consolidate or sell substantially all of our assets. The terms of the 2026 Indenture also include certain limitations on our non-guarantor subsidiaries incurring indebtedness. The proceeds of the offering were used to fund the redemption of our Senior Notes due 2022. Debt issuance costs of $10 million related to the Senior Notes due 2026 were recorded as a direct reduction of the carrying value of the long-term debt. Additionally, in connection with the redemption of our Senior Notes due 2022, we recorded $30 million in debt extinguishment costs including a call premium of $22 million during the second quarter of 2018. 6.5% Senior Secured Notes due 2025 On May 1, 2020, Tronox Incorporated, a wholly-owned indirect subsidiary of the Company, issued 6.5% senior secured notes due 2025 for an aggregate principal amount of $500 million (the "6.5% Senior Secured Notes due 2025"), which were issued under an indenture dated May 1, 2020. A portion of the proceeds of this debt offering was utilized to repay the $200 million of the Company's outstanding borrowings under its Wells Fargo, Standard Bank, and Emirates revolvers which was originally borrowed during the first quarter of 2020 (as discussed below). Standard Bank Term Loan Facility On March 25, 2019, our South African subsidiaries, Tronox KZN Sands Proprietary Limited and Tronox Mineral Sands Proprietary Limited, entered into the Standard Bank Term Loan Facility with a maturity date of March 25, 2024. The Term Loan Facility consists of (i) an aggregate principal amount of R2.6 billion (“Amortizing Loan”, approximately $177 million at December 31, 2020 exchange rate) the principal of which will be paid back at 5 percent per quarter over the five The Amortizing Loan bears interest at JIBAR plus 260 basis points when net leverage of the South African subsidiaries is less than 1.5 and JIBAR plus 285 points when net leverage is greater than 1.5. At December 31, 2020, the outstanding principal amounts for the Amortizing Loan was R1.7 billion (approximately $115 million). The Standard Bank Term Loan Facility contains financial covenants relating to certain ratio tests. In January 2021, we made a voluntary prepayment of R130 million (approximately $9 million at December 31, 2020 exchange rate) on the Standard Bank Term Loan Facility. No prepayment penalties were required as a result of this principal prepayment. As a result of this prepayment and pursuant to the loan agreement, the maturity date of the loan is accelerated to December 2023. Tikon Loan As part of the Cristal Transaction, we acquired a working capital debt agreement in China (“Tikon Loan”) that matures in April and May of 2021. The Tikon Loan bears interest based on an official lending basis rate per annum as announced and published by the People’s Bank of China plus a 7% premium. At December 31, 2020, the outstanding balance on the Tikon Loan was approximately CNY 111 million (approximately $17 million USD at December 31, 2020 exchange rate) which is recorded within "Long-term debt due within one year" on the Consolidated Balance Sheet. In February 2021, we made a voluntary prepayment of CNY 41 million (approximately $6 million USD at December 31, 2020 exchange rate) on the Tikon Loan. No prepayment penalties were required as a result of this principal prepayment. Australian Government Loan As part of the Cristal Transaction, we acquired an interest-free loan with the Australian government (“Australian Government Loan”) that matures in December 2021 subject to renewal every 5 years with final termination in December 2036. The loan balance due upon maturity is AUD 6 million (approximately $5 million at December 31, 2020). At December 31, 2020, the discounted value on the Australian Government Loan was approximately AUD 1.5 million (approximately $1 million at December 31, 2020 exchange rate). MGT Loan On December 17, 2020, we completed our agreement with Cristal to acquire certain assets co-located at our Yanbu facility which produce metal grade TiCl4 (“MGT”) in exchange for a $36 million note payable. Repayment of the note payable is based on a fixed U.S. dollar per metric ton quantity of MGT delivered by us to Advanced Metal Industries Cluster and Toho Titanium Metal Co. Ltd (ATTM) over time and therefore the ultimate maturity date is variable in nature. If ATTM fails to purchase MGT from us under certain contractually agreed upon conditions, then at our election we may terminate the MGT supply agreement with ATTM and will no longer owe any amount under the loan agreement with Cristal. We currently estimate the ultimate maturity to be between approximately five to seven years, subject to actual future MGT production levels. The interest rate is based on the Saudi Arabian Interbank Offered Rate (“SAIBOR”) plus a premium. As of December 31, 2020, the outstanding balance of the note payable was $36 million, of which $5 million is expected to be paid within the next twelve months (recorded within "Long-term debt due within one year" on our Consolidated Balance Sheet). Refer to Note 24 for further information on the MGT transaction. Short-term Debt As of both December 31, 2020 and December 31, 2019, there were no short-term debt balances. Wells Fargo Revolver On September 22, 2017, we entered into a new global senior secured asset-based syndicated revolving credit facility with Wells Fargo Bank, N.A. (the “Wells Fargo Revolver”). The Wells Fargo Revolver which initially provided us with up to $550 million of revolving credit lines, with an $85 million sublimit for letters of credit, and has a maturity date of September 22, 2022. Our availability of revolving credit loans and letters of credit is subject to a borrowing base. Borrowings bear interest at our option, at either an adjusted London Interbank Offered Rate (“LIBOR”) plus an applicable margin that ranges from 1.25% to 1.75%, or a base rate, which is defined to mean the greatest of (a) the administrative agent’s prime rate, (b) the Federal funds effective rate plus 0.50% and (c) the adjusted LIBOR for a one month period plus 1.00% plus a margin that ranges from 0.25% to 0.75%, in each case, based on the average daily borrowing availability. On March 22, 2019, we entered into a consent and amendment to the Wells Fargo Revolver and an amendment to our Term Loan Facility. The purpose of each amendment was to, among other things, (i) permit the refinancing of certain existing indebtedness incurred by our South African subsidiaries, Tronox KZN Sands Proprietary Limited and Tronox Mineral Sands Proprietary Limited, and the proposed uses of proceeds thereof, and (ii) implement required provisions in both the Wells Fargo Revolver and Term Loan Facility necessary in connection with the establishment of Tronox Holdings plc. The Wells Fargo Revolver amendment also modified certain components of the borrowing base in order to increase the potential availability of credit. We also voluntarily reduced the revolving credit lines under the Wells Fargo Revolver from $550 million to $350 million. As a result of this modification, during the months ended March 31, 2019, we recorded a charge of $2 million in “Loss on extinguishment of debt” within the Consolidated Statement of Operations. At December 31, 2020, there were no outstanding revolving credit loans under the Wells Fargo Revolver, excluding $25 million of issued and undrawn letters of credit under the Wells Fargo Revolver. Debt issuance costs associated with the Wells Fargo Revolver of $2 million were included in “Other long-term assets” in the Consolidated Balance Sheets at December 31, 2020 and are being amortized over the life of the Wells Fargo Revolver. The Wells Fargo Revolver contains a springing financial covenant that requires the Company and its restricted subsidiaries to maintain a consolidated fixed charge coverage ratio of at least 1.0:1.0 during certain test periods based on borrowing availability under the Wells Fargo Revolver or following the occurrence of specified events of default. ABSA Revolving Credit Facility In connection with the Standard Bank Revolver (defined below) entered into on March 25, 2019, discussed below, the ABSA Revolver was terminated on March 26, 2019. As a result of the termination, during the three months ended March 31, 2019, we recorded less than $1 million in “Loss on extinguishment of debt” within the Consolidated Statement of Operations. Standard Bank Credit Facility On March 25, 2019, our South African subsidiaries, Tronox KZN Sands Proprietary Limited and Tronox Mineral Sands Proprietary Limited, entered into the Standard Bank Credit Facility ("Standard Bank Revolver") for an amount up to R1 billion (approximately $68 million at December 31, 2020 exchange rate) maturing on March 25, 2022. The Standard Bank Credit Facility bears interest at the Johannesburg Interbank Average Rate (“JIBAR”) plus 260 basis points when net leverage for our South African subsidiaries (total combined debt outstanding under the Standard Bank Revolver and Standard Bank Term less cash and cash equivalents divided by the consolidated EBITDA) is less than 1.5 and JIBAR plus 285 basis points when net leverage is greater than 1.5. There were no balances outstanding at December 31, 2020. Emirates Revolver As part of the Cristal Transaction, we acquired a revolving credit facility with Emirates NBD PJSC. In March 2020, the Company entered into an amendment to, amongst other things, extend the maturity date of the Emirates Revolver from March 31, 2020 to March 31, 2021. Under the Emirates Revolver, we have the ability to borrow up to approximately $50 million. The revolver is secured by inventory and trade receivables of Cristal Pigment UK Ltd. Under the terms of the revolver, for U.S. dollar borrowings the interest rate is LIBOR plus 2.25% while the interest rate for Euro borrowings is Euribor plus 2.25%. There were no borrowings outstanding under this revolver at December 31, 2020. SABB Credit Facility On October 16, 2019, our KSA subsidiary entered into a short-term working capital facility with the Saudi British Bank (“SABB Facility”) for an amount up to SAR 70 million (approximately $19 million). The SABB Facility bears interest at the Saudi Inter Bank Offered Rate plus 180 basis points on outstanding balances. During October 2019, the Company borrowed SAR 50 million (or approximately $13 million) under the SABB Facility and subsequently repaid the outstanding balance in December 2019. Additionally, in March 2020, the Company borrowed SAR 50 million (or approximately $13 million) under the SABB Facility and subsequently repaid the outstanding balances. There is no borrowing outstanding under this facility at December 31, 2020. In December 2020, the Company extended the maturity date of the SABB Credit Facility from December 13, 2020 to November 30, 2021. Debt Covenants At December 31, 2020, we are in compliance with all financial covenants in our debt facilities. Interest and Debt Expense, Net Interest and debt expense, net in the Consolidated Statements of Operations consisted of the following: Year Ended December 31, 2020 2019 2018 Interest on debt $ 174 $ 186 $ 180 Amortization of deferred debt issuance costs and discounts on debt 10 8 11 Capitalized interest (2) (1) (3) Interest on capital leases and letters of credit and commitments 7 8 5 Total interest and debt expense, net $ 189 $ 201 $ 193 In connection with obtaining debt, we incurred debt issuance costs, which are being amortized through the respective maturity dates using the effective interest method for our long-term debt and on a straight-line basis for our Wells Fargo Revolver. At December 31, 2020 and December 31, 2019, we had deferred debt issuance costs of $2 million and $3 million, respectively, related to the Wells Fargo Revolver, which is recorded in “Other long-term assets” in the Consolidated Balance Sheets. At December 31, 2020 and December 31, 2019, we had debt discount of $9 million and $12 million, respectively, and debt issuance costs of $35 million and $34 million, respectively, primarily related to our term loan and senior notes, which were recorded as a direct reduction of the carrying value of the long-term debt in the Consolidated Balance Sheets.

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments Derivatives recorded on the Consolidated Balance Sheet: The following table is a summary of the fair value of derivatives outstanding at December 31, 2020 and 2019: Fair Value December 31, 2020 December 31, 2019 Assets(a) Accrued Liabilities Assets(a) Accrued Liabilities Derivatives Designated as Cash Flow Hedges Currency Contracts $ 58 $ — $ 30 $ — Interest Rate Swaps $ — $ 57 $ — $ 22 Total Hedges $ 58 $ 57 $ 30 $ 22 Derivatives Not Designated as Cash Flow Hedges Currency Contracts $ 7 $ — $ 7 $ — Total Derivatives $ 65 $ 57 $ 37 $ 22 (a) At December 31, 2020, current assets of $65 million are recorded in prepaid and other current assets on the Consolidated Balance Sheet. At December 31, 2019, current assets of $34 million were recorded in prepaid and other current assets and long-term assets of $3 million are recorded in other long-term assets on the Consolidated Balance Sheet. Derivatives' Impact on the Consolidated Statement of Operations The following table summarizes the impact of the Company's derivatives on the Consolidated Statement of Operations: Amount of Pre-Tax Gain (Loss) Recognized in Earnings Amount of Pre-Tax Gain (Loss) Recognized in Earnings Revenue Cost of Goods Sold Other Income (Expense), net Revenue Cost of Goods Sold Other Income (Expense), net Year Ended December 31, 2020 Year Ended December 31, 2019 Derivatives Not Designated as Hedging Instruments Currency Contracts $ — $ — $ 4 $ — $ — $ 7 Derivatives Designated as Hedging Instruments Currency Contracts $ (7) $ 3 $ — $ 5 $ 3 $ — Total Derivatives $ (7) $ 3 $ 4 $ 5 $ 3 $ 7 Interest Rate Risk During the second quarter of 2019, we entered into interest-rate swap agreements with an aggregate notional value of $750 million representing a portion of our Term Loan Facility, which effectively converts the variable rate to a fixed rate for that portion of the loan. The agreements expire in September 2024. The Company's objectives in using the interest-rate swap agreements are to add stability to interest expense and to manage its exposure to interest rate movements. These interest rate swaps have been designated as cash flow hedges and involve the receipt of variable amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. Fair value gains or losses on these cash flow hedges are recorded in other comprehensive (loss) income and are subsequently reclassified into interest expense in the same periods during which the hedged transactions affect earnings. For the year ended December 31, 2020 and December 31, 2019, the amounts recorded in interest expense related to the interest-rate swap agreements were $10 million and less than $1 million, respectively. At December 31, 2020 and December 31, 2019, the net unrealized loss was $57 million and $22 million, respectively, and was recorded in "Accumulated other comprehensive loss" on the Consolidated Balance Sheet. Foreign Currency Risk During the third quarter of 2019 and the first quarter of 2020, we entered into foreign currency contracts used to hedge forecasted third party non-functional currency sales for our South African subsidiaries and forecasted non-functional currency cost of goods sold for our Australian subsidiaries. These foreign currency contracts are designated as cash flow hedges. Changes to the fair value of these foreign currency contracts are recorded as a component of other comprehensive (loss) income, if these contracts remain highly effective, and are recognized in net sales or costs of goods sold in the period in which the forecasted transaction affects earnings or are recognized in other income (expense) when the transactions are no longer probable of occurring. As of December 31, 2020, we had notional amounts of 330 million Australian dollars (approximately $254 million at December 31, 2020 exchange rate) that expire between January 29, 2021 and December 30, 2021 to reduce the exposure of our Australian subsidiaries’ cost of sales to fluctuations in currency rates. All of our existing foreign currency contracts that reduced the exposure of our South African subsidiaries' third party sales to fluctuations in currency rates had expired as of December 31, 2020. At December 31, 2020 and December 31, 2019, there was an unrealized net gain of $58 million and an unrealized net gain of $30 million, respectively, recorded in "Accumulated other comprehensive loss" on the Consolidated Balance Sheet, which is expected to be recognized in earnings over the next twelve months.

Fair Value Measurement

Fair Value Measurement	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurement	Fair Value Measurement For financial instruments that are subsequently measured at fair value, the fair value measurement is grouped into levels. See Note 2. Our debt is recorded at historical amounts. The following table presents the fair value of our debt and derivative contracts at both December 31, 2020 and December 31, 2019: December 31, December 31, Term Loan Facility $ 1,610 $ 1,820 Standard Bank Term Loan Facility 115 158 Senior Notes due 2025 468 459 Senior Notes due 2026 641 636 6.5% Senior Secured Notes due 2025 536 — Tikon Loan 17 16 Australian Government Loan 1 1 MGT Loan 36 — Interest rate swaps 57 22 Foreign currency contracts, net 65 37 We determined the fair value of the Term Loan Facility, the Senior Notes due 2025, the Senior Notes due 2026 and the 6.5% Senior Secured Notes due 2025 using quoted market prices, which under the fair value hierarchy is a Level 1 input. We determined the fair value of the Standard Bank Term Loan Facility and Tikon Loan utilizing transactions in the listed markets for similar liabilities, which under the fair value hierarchy is a Level 2 input. The fair value of the Australian Government Loan and MGT Loan is based on the contracted amount which is a Level 2 input. We determined the fair value of the foreign currency contracts and interest rate swaps using inputs other than quoted prices in active markets that are observable either directly or indirectly. The fair value hierarchy for the foreign currency contracts and interest rate swaps is a Level 2 input. The carrying value of cash and cash equivalents, restricted cash, accounts receivable and accounts payable approximate fair value due to the short-term nature of these items. See Note 3, "Acquisitions and Related Divestitures", for the assets and liabilities measured on a non-recurring basis at fair value associated with our acquisition.

Leases

Leases	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Leases	Leases Lease expense for the year ended December 31, 2020 and December 31, 2019 was comprised of the following: Year Ended December 31, 2020 2019 Operating lease expense $ 48 $ 41 Finance lease expense: Amortization of right-of-use assets 1 1 Interest on lease liabilities 2 2 Short term lease expense 26 22 Variable lease expense 22 20 Total lease expense $ 99 $ 86 The table below summarizes lease expense for the year ended December 31, 2020 and December 31, 2019, recorded in the specific line items in our Consolidated Statements of Operations: Year Ended December 31, 2020 2019 Cost of goods sold $ 91 $ 80 Selling, general and administrative expenses 8 6 Total $ 99 $ 86 The weighted-average remaining lease term in years and weighted-average discount rates at December 31, 2020 and December 31, 2019 were as follows: December 31, 2020 December 31, 2019 Weighted-average remaining lease term: Operating leases 3.3 3.7 Finance leases 9.6 10.4 Weighted-average discount rate: Operating leases 7.7 % 8.5 % Finance leases 14.2 % 14.2 % The maturity analysis for operating leases and finance leases at December 31, 2020 were as follows: Operating Leases Finance Leases 2021 $ 44 $ 3 2022 23 3 2023 9 3 2024 7 3 2025 2 3 Thereafter 6 12 Total lease payments 91 27 Less: imputed interest (11) (12) Present value of lease payments $ 80 $ 15 Financial information for the year ended December 31, 2018 is not presented under ASC 842 as we adopted the new standard using the modified retrospective adjustment approach in 2019. Total rent expense related to operating leases recorded in "Cost of goods sold" in the Consolidated Statement of Operations was $22 million during 2018. Total rent expense related to operating leases recorded in "Selling, general and administrative expense" in the Consolidated Statement of Operations was $2 million during 2018. During 2018, we made principal payments of less than $1 million for finance leases. Additional information relating to cash flows and ROU assets for the year ended December 31, 2020 and 2019 is as follows: December 31, 2020 December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows used for operating leases $ 55 $ 41 Operating cash flows used for finance leases $ 2 $ 2 Financing cash flows used for finance leases $ 1 $ 1 Additional information relating to ROU assets for the year ended December 31, 2020 and 2019 is as follows: Year Ended December 31, 2020 2019 ROU assets obtained in exchange for lease obligations: Operating leases obtained in the normal course of business $ 29 $ 28 Operating leases acquired in connection with Cristal acquisition $ — $ 40 As of December 31, 2020, we have additional operating leases, primarily for equipment and machinery, that have not yet commenced. The related ROU asset is approximately $63 million. These leases will commence later in 2022 with lease terms of approximately 15 years.
Leases	Leases Lease expense for the year ended December 31, 2020 and December 31, 2019 was comprised of the following: Year Ended December 31, 2020 2019 Operating lease expense $ 48 $ 41 Finance lease expense: Amortization of right-of-use assets 1 1 Interest on lease liabilities 2 2 Short term lease expense 26 22 Variable lease expense 22 20 Total lease expense $ 99 $ 86 The table below summarizes lease expense for the year ended December 31, 2020 and December 31, 2019, recorded in the specific line items in our Consolidated Statements of Operations: Year Ended December 31, 2020 2019 Cost of goods sold $ 91 $ 80 Selling, general and administrative expenses 8 6 Total $ 99 $ 86 The weighted-average remaining lease term in years and weighted-average discount rates at December 31, 2020 and December 31, 2019 were as follows: December 31, 2020 December 31, 2019 Weighted-average remaining lease term: Operating leases 3.3 3.7 Finance leases 9.6 10.4 Weighted-average discount rate: Operating leases 7.7 % 8.5 % Finance leases 14.2 % 14.2 % The maturity analysis for operating leases and finance leases at December 31, 2020 were as follows: Operating Leases Finance Leases 2021 $ 44 $ 3 2022 23 3 2023 9 3 2024 7 3 2025 2 3 Thereafter 6 12 Total lease payments 91 27 Less: imputed interest (11) (12) Present value of lease payments $ 80 $ 15 Financial information for the year ended December 31, 2018 is not presented under ASC 842 as we adopted the new standard using the modified retrospective adjustment approach in 2019. Total rent expense related to operating leases recorded in "Cost of goods sold" in the Consolidated Statement of Operations was $22 million during 2018. Total rent expense related to operating leases recorded in "Selling, general and administrative expense" in the Consolidated Statement of Operations was $2 million during 2018. During 2018, we made principal payments of less than $1 million for finance leases. Additional information relating to cash flows and ROU assets for the year ended December 31, 2020 and 2019 is as follows: December 31, 2020 December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows used for operating leases $ 55 $ 41 Operating cash flows used for finance leases $ 2 $ 2 Financing cash flows used for finance leases $ 1 $ 1 Additional information relating to ROU assets for the year ended December 31, 2020 and 2019 is as follows: Year Ended December 31, 2020 2019 ROU assets obtained in exchange for lease obligations: Operating leases obtained in the normal course of business $ 29 $ 28 Operating leases acquired in connection with Cristal acquisition $ — $ 40 As of December 31, 2020, we have additional operating leases, primarily for equipment and machinery, that have not yet commenced. The related ROU asset is approximately $63 million. These leases will commence later in 2022 with lease terms of approximately 15 years.

Asset Retirement Obligations

Asset Retirement Obligations	12 Months Ended
	Dec. 31, 2020
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligations	Asset Retirement ObligationsAsset retirement obligations consist primarily of rehabilitation and restoration costs, landfill capping costs, decommissioning costs, and closure and post-closure costs. Activity related to asset retirement obligations was as follows: Year Ended December 31, 2020 2019 Balance, January 1 $ 158 $ 74 Additions 1 3 Accretion expense 12 10 Remeasurement/translation 7 — Changes in estimates, including cost and timing of cash flows (1) (8) Settlements/payments (15) (4) Transferred in with the acquisition of Cristal — 83 Other acquisition and divestiture related 4 — Balance, December 31 $ 166 $ 158 December 31, 2020 2019 Asset retirement obligations were classified as follows: Current portion included in “Accrued liabilities” $ 9 $ 16 Noncurrent portion included in “Asset retirement obligations” 157 142 Asset retirement obligations $ 166 $ 158 We used the following assumptions in determining asset retirement obligations at December 31, 2020: inflation rates between 1.6% - 4.4% per year; credit adjusted risk-free interest rates between 3.2% -17.7%; the life of mines between 1-26 years and the useful life of assets between 3-33 years. Environmental Rehabilitation Trust In accordance with applicable regulations, we have established an environmental rehabilitation trust for the prospecting and mining operations in South Africa, which receives, holds, and invests funds for the rehabilitation or management of asset retirement obligations. The trustees of the fund are appointed by us and consist of sufficiently qualified employees capable of fulfilling their fiduciary duties. At December 31, 2020 and 2019, the environmental rehabilitation trust assets were $12 million and $14 million, respectively, which were recorded in “Other long-term assets” in the Consolidated Balance Sheets.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Purchase and Capital Commitments —At December 31, 2020, purchase commitments were $194 million for 2021, $84 million for 2022, $62 million for 2023, $56 million for 2024, $44 million for 2025, and $135 million thereafter. Letters of Credit —At December 31, 2020, we had outstanding letters of credit and bank guarantees of $71 million, of which $26 million were letters of credit and $45 million were bank guarantees. Amounts for performance bonds were not material. Environmental Matters — It is our policy to record appropriate liabilities for environmental matters when remedial efforts are probable and the costs can be reasonably estimated. Such liabilities are based on our best estimate of the undiscounted future costs required to complete the remedial work. The recorded liabilities are adjusted periodically as remediation efforts progress or as additional technical, regulatory or legal information becomes available. Given the uncertainties regarding the status of laws, regulations, enforcement policies, the impact of other potentially responsible parties, technology and information related to individual sites, we do not believe it is possible to develop an estimate of the range of reasonably possible environmental loss in excess of our recorded liabilities. We expect to fund expenditures for these matters from operating cash flows. The timing of cash expenditures depends principally on the timing of remedial investigations and feasibility studies, regulatory approval of cleanup projects, remedial techniques to be utilized and agreements with other parties. Included in these environmental matters are the following: Hawkins Point Plant. Residual waste mud, known as Batch Attack Mud, and a spent sulfuric waste stream were deposited in an onsite repository (the “Batch Attack Lagoon”) at a former TiO 2 manufacturing site, Hawkins Point Plant in Baltimore, Maryland, operated by Cristal USA, Inc. from 1954 until 2011. We assumed responsibility for remediation of the Hawkins Point Plant when we acquired the TiO 2 business of Cristal in April 2019. In 1984, a predecessor of Cristal and the Maryland Department of the Environment (“MDE”) entered into a consent decree (the “Consent Decree”) to address the Batch Attack Lagoon. The Consent Decree required that Cristal close the Batch Attack Lagoon when the Hawkins Point Plant ceased operations. In addition, we are investigating whether hazardous substances are migrating from the Batch Attack Lagoon. A provision of $60 million has been made in our financial statements for the Hawkins Point Plant consistent with the accounting policy described above. We are in discussions with the MDE regarding a new consent decree to address both the Batch Attack Lagoon as well as other environmental contamination issues associated with the Hawkins Point Plant. Other Matters — We are subject to a number of other lawsuits, investigations and disputes (some of which involve substantial amounts claimed) arising out of the conduct of our business, including matters relating to commercial transactions, prior acquisitions and divestitures, including our acquisition of Cristal, employee benefit plans, intellectual property, and environmental, health and safety matters. We recognize a liability for any contingency that is probable of occurrence and reasonably estimable. We continually assess the likelihood of adverse judgments of outcomes in these matters, as well as potential ranges of possible losses (taking into consideration any insurance recoveries), based on a careful analysis of each matter with the assistance of outside legal counsel and, if applicable, other experts. Included in these other matters is the following: Venator Materials plc v. Tronox Limited. In May 2019, Venator Materials plc (“Venator”) filed an action in the Superior Court of the State of Delaware alleging among other things that we owed Venator a $75 million “Break Fee” pursuant to the terms of a preliminary agreement dated July 14, 2018 (the “Exclusivity Agreement”). The Exclusivity Agreement required, among other things, Tronox and Venator to use their respective best efforts to negotiate a definitive agreement to sell the entirety of the National Titanium Dioxide Company Limited’s (“Cristal’s”) North American operations to Venator if a divestiture of all or a substantial part of these operations were required to secure the approval of the Federal Trade Commission for us to complete our acquisition of Cristal’s TiO 2 business. In June 2019, we denied Venator's claims and counterclaimed against Venator seeking to recover $400 million in damages from Venator that we suffered as a result of Venator’s breaches of the Exclusivity Agreement. Specifically, we alleged, among other things, that Venator’s failure to use best efforts constituted a material breach of the Exclusivity Agreement and directly resulted in and caused us to sell Cristal’s North American operations to an alternative buyer for $701 million, $400 million less than the price Venator had agreed to in the Exclusivity Agreement. Though we believe that our interpretation of the Exclusivity Agreement is correct, there can be no assurance that we will prevail in litigation.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss) Attributable to Tronox Holdings plc and Other Equity Items	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss) Attributable to Tronox Holdings plc and Other Equity Items	Accumulated Other Comprehensive Income (Loss) Attributable to Tronox Holdings plc and Other Equity ItemsThe tables below present changes in accumulated other comprehensive income (loss) by component for 2020, 2019 and 2018. Cumulative Translation Adjustment Pension Liability Adjustment Unrealized Gains (losses) on Derivatives Total Balance, January 1, 2018 $ (312) $ (90) $ (1) $ (403) Other comprehensive income (loss) (133) (5) 1 (137) Amounts reclassified from accumulated other comprehensive income (loss) — — — — Balance, December 31, 2018 (445) (95) — (540) Other comprehensive income (loss) 3 (11) 8 — Acquisition of noncontrolling interest (61) — — (61) Amounts reclassified from accumulated other comprehensive income (loss) — 2 (7) (5) Balance, December 31, 2019 $ (503) $ (104) $ 1 $ (606) Other comprehensive income (loss) 12 (20) (4) (12) Amounts reclassified from accumulated other comprehensive income (loss) — 4 4 8 Balance, December 31, 2020 $ (491) $ (120) $ 1 $ (610) Repurchase of Common Stock In addition to the repurchase of 14 million shares from Exxaro discussed in Note 24, “Related Parties”, on June 3, 2019, the Company’s Board of Directors authorized the repurchase of up to $100 million of the Company’s stock. During the year ended December 31, 2019, we purchased 7,453,391 shares under the authorization at an average price of $11.59 per share and at a cost of approximately $87 million, including sales commissions and fees. We did not complete the full program given certain Section 382 restrictions related to our NOLs. Upon repurchase of the shares by the Company, the shares were cancelled.

Share-based Compensation

Share-based Compensation	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Share-based Compensation	Share-based Compensation Share-based compensation expense consisted of the following: Year Ended December 31, 2020 2019 2018 Restricted shares and restricted share units $ 30 $ 32 $ 21 Options — — — Total share-based compensation expense (continuing operations) $ 30 $ 32 $ 21 The stock compensation expense for the year ended December 31, 2020 is inclusive of a $4 million credit for the reversal of expense due to the 2018 performance grants. Tronox Holdings plc Amended and Restated Management Equity Incentive Plan On March 27, 2019, in connection with the Re-domicile Transaction, Tronox Holdings plc assumed the management equity incentive plan previously adopted by Tronox Limited, which plan was renamed the Tronox Holdings plc Amended and Restated Management Equity Incentive Plan. The amendments to the plan were made to provide, among other things, for the appropriate substitution of Tronox Holdings in place of Tronox Limited and to ensure the compliance with the laws of England and Wales law in place of Australian law. The MEIP permits the grant of awards that are comprised of incentive options, nonqualified options, share appreciation rights, restricted shares, restricted share units, performance awards, and other share-based awards, cash payments, and other forms as the compensation committee of the Board of Directors (the “Board”) in its discretion deems appropriate, including any combination of the above. The maximum number of shares which were initially subjected to awards (inclusive of incentive options) was 20,781,225 ordinary shares and was increased by 8,000,000 on the affirmative vote of our shareholders on June 24, 2020. Restricted Shares We did not grant any restricted shares during 2020 or 2019. Restricted shares issued under the MEIP contain non-forfeitable dividend rights. During the prior year, the restricted shares became fully vested. The total fair value of restricted shares that vested during both 2019 and 2018 was less than $1 million. Restricted Share Units (“RSUs”) During 2017, a total of 1,397,471 RSUs were granted, pursuant to an Integration Incentive Award program (“Integration Incentive Award”) established in connection with the Cristal Transaction, to certain executive officers and managers with significant integration accountability. In addition, during the second quarter of 2018, an additional 139,225 RSUs were granted under the Integration Incentive Award. These RSUs would have vested two years from the date of the close of the Cristal Transaction and the number of shares that would have been issued to grantees would have been based upon the achievement of established performance conditions. Under the original terms of the Integration Incentive Award, if the Cristal Transaction did not close by July 1, 2018, all unvested awards pursuant to the Integration Incentive Award would immediately be canceled and forfeited. During the second quarter of 2018, terms of the Integration Incentive Award were modified to eliminate the requirement that the Cristal Transaction must close by July 1, 2018. We accounted for this modification as a Type III modification since, at the modification date, the expectation of the award vesting changed from improbable to probable. As a result, we reversed approximately $6 million of previously recorded expense related to the Integration Incentive Award. The issued and unvested RSUs under the Integration Incentive Award were revalued based on the closing price of the Company’s stock on the modification date and will vest two years from the date the Cristal Transaction closed and based upon the achievement of established performance conditions. As a result, the estimated expense associated with the revalued award is being expensed over the period from the modification date through two years from the date that the Cristal Transaction closed. During the third and fourth quarter of 2018, an additional 90,161 and 40,161 RSUs, respectively, were granted under the modified terms of the Integration Incentive Award, and during the third and fourth quarter of 2019, 65,387 and 16,750 additional RSUs were granted, respectively. All the integration awards discussed above will vest on April 10, 2021 if performance conditions are met. In addition to the Integration Incentive Award, during 2020, we granted RSUs which have time and/or performance conditions. Both the time-based awards and the performance-based awards are classified as equity awards. 2020 Grant - The Company granted both time-based and performance-based awards to certain members of management and to members of the Board. A total of 1,784,377 of time-based awards were granted to management which will vest ratably over a three-year period ending March 5, 2023. A total of 193,805 of time-based awards were granted to members of the Board of which 21,654 vested in June 2020, 161,720 will vest in May 2021 and 10,431 will vest in June 2021. A total of 1,533,008 of performance-based awards were granted, of which 766,504 of the awards vest based on a relative Total Shareholder Return ("TSR") calculation and 766,504 of the awards vest based on certain performance metrics of the Company. The non-TSR performance-based awards vest on March 5, 2023 based on the achievement against the target average company performance of three separate performance periods, commencing on January 1 of each 2020, 2021, and 2022 and ending on December 31 of each 2020, 2021 and 2022, for which, for each performance period, the performance metric is an average annual operating return on net assets (ORONA). Similar to the Company's historical TSR awards granted in prior years, the TSR awards vest based on the Company's three-year TSR versus the peer group performance levels. Given these terms, the TSR metric is considered a market condition for which we used a Monte Carlo simulation to determine the weighted average grant date fair value of $10.00. Similar TSR awards were granted during 2019 and 2018 with grant date fair values of $12.65 and $20.80, respectively, which were calculated utilizing a Monte Carlo simulation. The following weighted-average assumptions were utilized to value the grants in 2020, 2019 and 2018: 2020 2019 2018 Dividend yield 2.13 % N/A N/A Expected historical volatility 58.30 % 67.20 % 80.40 % Risk free interest rate 1.42 % 2.50 % 2.32 % Expected life (in years) 3 3 3 The following table presents a summary of activity for RSUs for 2020: Number of Shares Weighted Average Grant Date Fair Value Outstanding, January 1, 2020 5,557,659 $ 15.19 Granted 3,982,816 8.89 Vested (2,033,591) 14.56 Forfeited (202,979) 11.75 Outstanding, December 31, 2020 7,303,905 $ 12.39 Expected to vest, December 31, 2020 6,805,041 $ 12.21 The 2017 performance-based RSUs vested above target in 2020 and resulted in 471,626 additional RSU shares being granted and vested immediately. At December 31, 2020, there was $32 million of unrecognized compensation expense related to nonvested RSUs, adjusted for estimated forfeitures, which is expected to be recognized over a weighted-average period of 1.7 years. The weighted-average grant-date fair value of RSUs granted during 2020, 2019 and 2018 was $8.89 per unit, $10.81 per unit, and $19.23 per unit, respectively. The total fair value of RSUs that vested during 2020, 2019 and 2018 was $30 million, $20 million and $17 million, respectively. Options The fair value of options granted is determined on the grant date using the Black-Scholes option-pricing model and is recognized in earnings on a straight-line basis over the employee service period of three years, which is the vesting period. The assumptions used in the Black-Scholes option-pricing model on the grant date are based on (i) a fair value using the closing price of our Ordinary Shares on the grant date, (ii) a risk-free interest rate based on U.S. Treasury Strips available with a maturity period consistent with the expected life assumption, (iii) an expected volatility assumption based on historical price movements of our peer group, and (iv) a dividend yield determined based on the Company’s expected dividend payouts. We did not issue any options during 2020 and 2019 and all our options outstanding are fully vested at December 31, 2020. The following table presents a summary of option activity for 2020: Number of Options Weighted Average Exercise Price Weighted Average Contractual Life (years) Intrinsic Value Outstanding, January 1, 2020 1,260,902 $ 21.54 3.18 $ — Exercised — — Forfeited — — Expired (59,011) 20.22 Outstanding and Exercisable, December 31, 2020 1,201,891 $ 21.60 2.19 $ — The aggregate intrinsic values in the table represent the total pre-tax intrinsic value (the difference between our share price at the indicated dates and the options’ exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their in-the-money options at the end of the year. The amount will change based on the fair market value of our stock. There were no options exercised during both 2020 and 2019 and consequently there was no related intrinsic value. Total intrinsic value of options exercised during 2018 was less than $1 million. We issue new shares upon the exercise of options. During 2018, we received $4 million, in cash for the exercise of stock options. At both December 31, 2020 and 2019, there was no unrecognized compensation expense related to options.

Pension and Other Postretiremen

Pension and Other Postretirement Healthcare Benefits	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Pension and Other Postretirement Healthcare Benefits	Pension and Other Postretirement Healthcare Benefits The following provides information regarding our U.S. and foreign plans: U.S. Plans Pension Plans — Tronox has one main U.S. defined benefit plan: the U.S. Qualified Plan. Prior to December 2020, the Company also had the U.S. Pension Plan (which was acquired as part of the Cristal acquisition). In December 2020, the U.S. Pension Plan was frozen and merged into the U.S. Qualified Plan. The U.S. Qualified Plan is a funded noncontributory qualified benefit plan which is in accordance with the Employee Retirement Income Security Act of 1974 (“ERISA”) and the Internal Revenue Code. We made contributions into funds managed by a third party, and those funds are held exclusively for the benefit of the plan participants. Benefits under the U.S. Qualified Plan were generally calculated based on years of service and final average pay. The U.S. Qualified Plan was frozen and closed to new participants on June 1, 2009. Postretirement Healthcare Plans — We maintain a U.S. retiree welfare plan. Additionally, in prior periods, we also maintained a U.S. postretirement healthcare plan which we settled in 2015 which resulted in a settlement gain of $3 million which had been deferred to “Accumulated other comprehensive loss” in the Consolidated Balance Sheet as settlement accounting requirements were deemed not fully satisfied. During 2018, we released the $3 million from “Accumulated other comprehensive loss” and recorded such amount in “Other income (expense), net” in the Consolidated Statement of Operations. International Plans Pension Plans — Tronox has international defined benefit commitments primarily in the United Kingdom ("U.K. DB Scheme") and Saudi Arabia. The U.K. DB Scheme is a funded qualified defined benefit plan in the United Kingdom, which is frozen with no additional benefits accruing to the participants. Benefits under the U.K. DB Scheme are generally calculated based on years of credit service and final compensation when benefits ceased to accrue as defined under the plan provisions. We also maintain a Saudi Arabia Cristal End of Service Benefit plan which provides end of service benefits to qualifying participants. End of service benefits are based on years of service and the reasons for which a participant's services to the Company are terminated. Multiemployer Pension Plan - In prior periods, we maintained a defined benefit plan in the Netherlands (the “Netherlands Plan”) to provide defined pension benefits to qualifying employees of Tronox Pigments (Holland) B.V. and its related companies. During 2014, the Netherlands Plan was replaced with a multiemployer plan, the Netherlands Contribution Plan (the "CDC Plan") effective January 1, 2015. Under the CDC Plan, employees earn benefits based on their pensionable salaries each year determined using a career average benefit formula. The collective bargaining agreement between us and the participants require us to contribute 21.2% of the participants’ pensionable salaries into a pooled fund administered by the industry-wide PGB. The pensionable salary is the annual income of employees subject to a cap, which is adjusted each year to reflect the current requirements of the Netherlands’ Wages and Salaries Tax Act of 1964. Our obligation under this plan is limited to the fixed percentage contribution we make each year. The employees are entitled to any returns generated from the investment activities of the fund. The following table outlines the details of our participation in the CDC Plan for the year ended December 31, 2020. The CDC disclosures provided herein are based on the fund’s 2019 annual report, which is the most recently available public information. Based on the total plan assets and accumulated benefit obligation information in the plan’s annual report, the zone status was green as of December 31, 2019. A green zone status indicates that the plan was at least 80 percent funded. The “FIP/RP Status Pending/Implemented” column indicates whether a financial improvement plan (FIP) or a rehabilitation plan (RP) is either pending or has been implemented. As of December 31, 2020, we are not aware of any financial improvement or rehabilitation plan being implemented or pending. The last column lists the expiration date of the collective-bargaining agreement to which the plan is subject. Pension Protection Act Zone Status Tronox Contributions Pension Fund EIN/Pension Plan Number 2020 2019 FIP/RP Pending/ Implemented 2020 2019 Surcharge Imposed Expiration date of Collective- Bargaining Agreement PGB NA N/A Green No $ 5 $ 4 No 12/31/2024 On the basis of the information available in the CDC Plan 2019 annual report, our contribution does not constitute more than 5 percent of the total contribution to the plan by all participants. During 2020, the fund did not impose any surcharge on us. Postretirement Healthcare Plans — We also maintain postretirement healthcare plans in South Africa (the "South African Plan") and Brazil (the "Brazil Medical Plan"). The South African Plan provides medical and dental benefits to certain South African employees, retired employees and their registered dependents. The South African Plan provides benefits as follows: (i) members employed before March 1, 1994 receive 100% post-retirement and death-in-service benefits; (ii) members employed on or after March 1, 1994 but before January 1, 2002 receive 2% per year of completed service subject to a maximum of 50% post-retirement and death-in-service benefits; and, (iii) members employed on or after January 1, 2002 receive no post-retirement and death-in-service benefits. The Brazil Medical Plan provides post-employment medical benefits to employees who contributed to the medical plan while employed. Retirees receiving a benefit under the plan are required to pay a contribution that varies based on the coverage level elected. Pension and Postretirement Benefit Costs / Obligations Benefit Obligations and Funded Status — The following provides a reconciliation of beginning and ending benefit obligations, beginning and ending plan assets, funded status, and balance sheet classification of our U.S. and international pension plans and other post-retirement benefit plans ("OPEB") as of and for the years ended December 31, 2020 and 2019. The benefit obligations and plan assets associated with our principal benefit plans are measured on December 31. Pensions Other Post Retirement Benefit Plans December 31 December 31 2020 2019 2020 2019 US International US International US International US International Change in benefit obligations: Benefit obligation, beginning of year $ 398 $ 232 $ 329 $ — $ 2 $ 13 $ — $ 7 Service cost 1 4 1 3 — — — — Interest cost 12 5 16 4 — 1 — 1 Net actuarial (gains) losses 28 20 36 6 — 3 — 2 Acquisition, net (1) — — 106 230 — — 2 3 Curtailments (2) — — — — (1) — — Settlements (7) (6) (59) (3) — — — — Plan amendments (2) — — — — — 9 — — Foreign currency rate changes — 6 — 2 — (2) — — Benefits paid (31) (9) (31) (10) — — — — Benefit obligation, end of year (3) 399 252 398 232 2 23 2 13 Change in plan assets: Fair value of plan assets, beginning of year 319 186 243 — — — — — Actual return on plan assets 41 15 51 6 — — — — Acquisition, net (1) — — 105 184 — — — — Employer contributions 22 3 10 7 — — — — Benefits paid (31) (9) (31) (10) — — — — Foreign currency rate changes — 6 — 2 — — — — Settlements (7) (6) (59) (3) — — — — Fair value of plan assets, end of year 344 195 319 186 — — — — Net underfunded status of plans $ (55) $ (57) $ (79) $ (46) $ (2) $ (23) $ (2) $ (13) Classification of amounts recognized in the Consolidated Balance Sheets: Other long-term assets $ — $ 14 $ 6 $ 20 $ — $ — $ — $ — Accrued liabilities — (5) — (6) — — — — Pension and postretirement healthcare benefits (55) (66) (85) (60) (2) (23) (2) (13) Total liabilities (55) (71) (85) (66) (2) (23) (2) (13) Accumulated other comprehensive (income) loss 98 12 96 4 — 12 — 1 Total $ 43 $ (45) $ 17 $ (42) $ (2) $ (11) $ (2) $ (12) ________________ (1) Represents the assets and benefit obligations assumed as part of the Cristal Transaction in 2019. Such plan assets and benefit obligations were remeasured as of the merger date and all subsequent activity through December 31, 2019 is presented within the respective captions above. (2) Relates to a plan amendment entered into during 2020 related to the Brazil Medical Plan. (3) Since the benefits under the U.S Qualified Plan and the U.K. DB Scheme are frozen, the projected benefit obligation and accumulated benefit obligation are the same. Contributions At a minimum, Tronox contributes to its pension plans to comply with local regulatory requirements (e.g., ERISA in the United States). Discretionary contributions in excess of the local minimum requirements are made based on many factors, including long-term projections of the plans' funded status, the economic environment, potential risk of overfunding, pension insurance costs and alternative uses of the cash. Changes to these factors can impact the timing of discretionary contributions from year to year. Pension contributions were $17 million in 2020, net of $4 million received from the winding up of our Australian plan and estimated required contributions for 2021 are currently expected to be approximately $2 million. The following table provides information for pension plans where the accumulated benefit obligation exceeds the fair value of the plan assets: Pensions 2020 US International Projected benefit obligation (PBO) $ 399 $ 71 Accumulated benefit obligation (ABO) $ 399 $ 46 Fair value of plan assets $ 344 $ — Expected Benefit Payments — The following table shows the expected cash benefit payments for the next five years and in the aggregate for the years 2026 through 2030: 2021 2022 2023 2024 2025 2026-2030 Pensions - US $ 31 $ 31 $ 28 $ 27 $ 27 $ 119 Pensions - International $ 12 $ 9 $ 11 $ 11 $ 12 $ 63 Other Post Retirement Benefit Plans - US $ — $ — $ — $ — $ — $ 1 Other Post Retirement Benefit Plans - International $ — $ — $ 1 $ 1 $ 1 $ 8 Retirement and Postretirement Healthcare Expense — The table below presents the components of net periodic cost associated with the U.S. and foreign plans recognized in the Consolidated Statements of Operations for 2020, 2019, and 2018: Pensions Other Postretirement Benefit Plans Year Ended December 31, Year Ended December 31, 2020 2019 2018 2020 2019 2018 Net periodic cost: Service cost $ 5 $ 4 $ — $ — $ — $ — Interest cost (1) 17 21 13 1 1 1 Expected return on plan assets (1) (22) (22) (15) — — — Net amortization of actuarial loss (1) 4 2 3 — — — Settlement losses (gains) (1) — (1) — — — (3) Curtailment (gains) (1) (2) — — — — — Total net periodic cost - continuing operations $ 2 $ 4 $ 1 $ 1 $ 1 $ (2) ________________ (1) Recorded in Other income (expense), net in the Consolidated Statement of Operations. Assumptions — The following weighted average assumptions were used to determine net periodic cost: Pension 2020 2019 2018 US International US International US Discount rate 3.39 % 1.98 % 4.34 % 2.50 % 3.71 % Expected return on plan assets 6.03 % 2.50 % 5.69 % 3.00 % 5.64 % OPEB 2020 2019 2018 US International US International International Discount rate 3.36 % 8.72 % 4.00 % 10.25 % 11.54 % Expected return on plan assets N/A N/A N/A N/A N/A The following weighted average assumptions were used in estimating the actuarial present value of benefit obligations: Pensions 2020 2019 2018 US International US International US Discount rate 2.60 % 1.45 % 3.39 % 1.98 % 4.40 % Rate of compensation increase 3.00 % 4.65 % 3.00 % 4.67 % N/A OPEB 2020 2019 2018 US International US International International Discount rate 2.59 % 9.51 % 3.36 % 9.91 % 11.38 % Rate of compensation increase N/A N/A N/A N/A N/A For the U.S. Qualified Plan and the U.S. Pension Plan, the mortality assumption was updated on December 31, 2020 to use the Society of Actuaries' most recently published generational projection scale (i.e. MP-2020) and base table (i.e. Pri-2012). The mortality improvement scale that had been used as of December 31, 2019 was the MP-2019 projection scale and the base table was Pri-2012. Expected Return on Plan Assets — In forming the assumption of the U.S. and international long-term rate of return on plan assets, we considered the expected earnings on funds already invested, earnings on contributions expected to be received in the current year, and earnings on reinvested returns. The long-term rate of return estimation methodology for the Company's pension plans is based on a capital asset pricing model using historical data and a forecasted earnings model. An expected return on plan assets analysis is performed which incorporates the current portfolio allocation, historical asset-class returns, and an assessment of expected future performance using asset-class risk factors. Discount Rate — The 2020 and 2019 rates were selected based on the results of a cash flow matching analysis, which projected the expected cash flows of the plans using a yield curves model developed from a universe of Aa-graded U.S. currency corporate bonds (obtained from Bloomberg) with BVAL scores of 6 or greater. The 2018 rates were similarly selected with the exception of the use of BVAL scores as a selection criteria. Bonds with features that imply unreliable pricing, a less than certain cash flow, or other indicators of optionality are filtered out of the universe. The remaining universe is categorized into maturity groups, and within each of the maturity groups yields are ranked into percentiles. Plan Assets — The investments of the U.S. and International pension plans are managed to meet the future expected benefit liabilities of the plan over the long term by investing in diversified portfolios consistent with prudent diversification and historical and expected capital market returns . Tronox's U.S. and international pension plans’ weighted-average asset allocations at December 31, 2020 and 2019, and the target asset allocation ranges, by major asset category, are as follows: December 31, 2020 2019 US International US International Actual Target Actual Target Actual Target Actual Target Equity securities 43 % 42 % — % — % 50 % 49 % 7 % 4 % Debt securities 39 40 39 30 48 48 26 25 Real estate 1 — — — 1 — — — Other 17 18 61 70 1 3 67 71 Total 100 % 100 % 100 % 100 % 100 % 100 % 100 % 100 % The fair values of pension investments as of December 31, 2020 are summarized below: Fair Value Measurement at December 31, 2020 Using: Quoted Prices Significant Other Significant Total Asset category: Equities securities: Global equity securities $ 83 (1) $ — $ — $ 83 Global comingled equity funds 66 (2) — — 66 Debt securities: US government bonds 70 (3) — — 70 Foreign government bonds 37 (3) — — 37 US corporate bonds — 62 (4) — 62 Foreign corporate bonds — 43 (4) — 43 Real Estate: Property/ real estate fund — 1 (5) — 1 Other: Insurance contracts — — 111 (7) 111 Cash & cash equivalents 66 (6) — — 66 Total at fair value $ 322 $ 106 $ 111 $ 539 ________________ (1) For global equity securities, this category is comprised of shares of common stock in both U.S. and international companies from a diverse set of industries and size. Common stock is valuated at the closing market price reported on a U.S. or international exchange where the security is actively traded. Equity securities are classified within level 1 of the fair value hierarchy. (2) Global commingled equity funds are comprised of managed funds that invest in common stock of both U.S. and international companies shares from a diverse set of industries and size. Common stock are valued at the closing market price reported on a U.S. or international exchange where the security is actively traded. These funds are classified within level 1 of the fair value hierarchy. (3) For US and foreign government bonds, this category includes U.S. treasuries, U.S. federal agency obligations and international government debt. The fair value of these investments are based on observable quoted prices on active exchanges, which are level 1 inputs. (4) For US corporate bonds and foreign corporate bonds, this category is comprised of corporate bonds of U.S. and foreign companies from a diverse set of industries and size. The fair values for the U.S. and foreign corporate bonds are determined using quoted prices of similar securities in active markets and observable data or broker or dealer quotations. The fair values for these investments are classified as level 2 within the valuation hierarchy. (5) For property / real estate funds, this category includes real estate properties, partnership equities and investments in operating companies. The fair value of the assets is determined using discounted cash flows by estimating an income stream for the property plus a reversion into a present value at a risk adjusted rate. Yield rates and growth assumptions utilized are derived from market transactions as well as other financial and industry data. The fair value of these investments are classified as level 2 in the valuation hierarchy. (6) Cash and cash equivalents include cash and short-interest bearing investments with maturities of three months or less. Investments are valued at cost plus accrued interest. Cash and cash equivalents are classified within level 1 of the valuation hierarchy. (7) For insurance contracts, the fair value is estimated as the cost of purchasing equivalent annuities on terms consistent with those currently available in the market. The contracts are with highly rated insurance companies and are classified within level 3 of the valuation hierarchy. The following table summarizes changes in fair value of the pension plan assets classified as level 3 for the year ended December 31, 2020: Insurance Contracts Balance, December 31, 2019 $ 104 Actual return on plan assets 9 Purchases, sales, settlements (5) Transfers in/out of Level 3 — Foreign currency translation 3 Balance, December 31, 2020 $ 111 The fair values of pension investments as of December 31, 2019 are summarized below: Fair Value Measurement at December 31, 2019, Using: Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Asset category: Equities securities: Global equity securities $ 68 (1) $ — $ — $ 68 Global comingled equity funds 104 (2) — — 104 Debt securities: US government bonds 69 (3) — (3) — 69 Foreign government bonds 34 (3) — — 34 US corporate bonds — 79 — 79 Foreign corporate bonds 16 (5) 6 — 22 Real Estate: Property/ real estate fund — 1 (6) — 1 Other: Insurance contracts — — 104 (9) 104 Alternative investments — 1 (7) — 1 Cash & cash equivalents 23 (8) — — 23 Total at fair value $ 314 $ 87 $ 104 $ 505 ________________ (1) For global equity securities, this category is comprised of shares of common stock in both U.S. and international companies from a diverse set of industries and size. Common stock is valuated at the closing market price reported on a U.S. or international exchange where the security is actively traded. Equity securities are classified within level 1 of the fair value hierarchy. (2) Global commingled equity funds are comprised of managed funds that invest in common stock of both U.S. and international companies shares from a diverse set of industries and size. Common stock are valued at the closing market price reported on a U.S. or international exchange where the security is actively traded. These funds are classified within level 1 of the fair value hierarchy. (3) For US and foreign government bonds, this category includes U.S. treasuries, U.S. federal agency obligations and international government debt. The fair value of these investments are based on observable quoted prices on active exchanges, which are level 1 inputs. (4) For US corporate bonds and a portion of foreign corporate bonds, this category is comprised of corporate bonds of U.S. and foreign companies from a diverse set of industries and size. The fair values for the U.S. and foreign corporate bonds are determined using quoted prices of similar securities in active markets and observable data or broker or dealer quotations. The fair values for these investments are classified as level 2 within the valuation hierarchy. (5) For certain foreign corporate bonds, the category is comprised of corporate bonds of foreign companies from a diverse set of industries and size. The fair value is based on observable quoted prices on active exchanges, which are level 1 inputs. (6) For property / real estate funds, this category includes real estate properties, partnership equities and investments in operating companies. The fair value of the assets is determined using discounted cash flows by estimating an income stream for the property plus a reversion into a present value at a risk adjusted rate. Yield rates and growth assumptions utilized are derived from market transactions as well as other financial and industry data. The fair value of these investments are classified as level 2 in the valuation hierarchy. (7) For alternative investments, this category is comprised of investments in alternative mutual funds whose holdings include liquid securities, cash and derivatives. Such funds focus on diversification and employ a variety of investing strategies including long/short equity, multi-strategy, and global macro. The fair value of these investments is determined by reference to the net asset value of the underlying holdings of the fund, which can be determined using observable data (e.g. indices, yield curves, quoted prices of similar securities), and is classified within level 2 of the valuation hierarchy. (8) Cash and cash equivalents include cash and short-interest bearing investments with maturities of three months or less. Investments are valued at cost plus accrued interest. Cash and cash equivalents are classified within level 1 of the valuation hierarchy. (9) For insurance contracts, the fair value is estimated as the cost of purchasing equivalent annuities on terms consistent with those currently available in the market. The contracts are with highly rated insurance companies and are classified within level 3 of the valuation hierarchy. The following table summarizes changes in fair value of the pension plan assets classified as level 3 for the year ended December 31, 2019: Insurance Contracts Balance, December 31, 2018 $ — Actual return on plan assets 2 Acquisitions 101 Transfers in/out of Level 3 — Foreign currency translation 1 Balance, December 31, 2019 $ 104 Defined Contribution Plans U.S. Savings Investment Plan In 2006, we established the U.S. Savings Investment Plan (the “SIP”), a qualified defined contribution plan under Section 401(k) of the Internal Revenue Code. Under the SIP, our regular full-time and part-time employees contribute a portion of their earnings, and we match these contributions up to a predefined threshold. Our matching contribution is 100% of the first 6% of employee contributions. Effective January 1, 2013, we established a profit sharing contribution at 6% of employees’ pay (“discretionary contribution”). The discretionary contribution is subject to our Board of Directors’ approval each year. The Board approved discretionary contribution of 6% of pay for 2020, 2019 and 2018. Our matching contribution to the SIP vests immediately; however, our discretionary contribution is subject to vesting conditions that must be satisfied over a three U.S. Benefit Restoration Plan In 2006, we established the U.S. Benefit Restoration Plan (the “BRP”), a nonqualified defined contribution plan, for employees whose eligible compensation is expected to exceed the IRS compensation limits for qualified plans. Under the BRP, participants can contribute up to 20% of their annual compensation and incentive. Our matching contribution under the BRP is the same as the SIP. Our matching contribution under this plan vests immediately to plan participants. Contributions under the BRP, including our match, are invested in accordance with the investment options elected by plan participants. Compensation expense associated with our matching contribution to the BRP was $1 million, $2 million and $1 million during 2020, 2019 and 2018 which was included in “Selling, general and administrative expenses” in the Consolidated Statements of Operations.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2020
Related Party Transactions [Abstract]
Related Party Transactions	Related Party TransactionsExxaro At December 31, 2020, Exxaro continues to own approximately 14.7 million shares of Tronox, or a 10.3% ownership interest, as well as their 26% ownership interest in our South African operating subsidiaries. We had service level agreements with Exxaro for research and development that expired during the third quarter of 2018 . Such service level agreements amounted to expenses of $1 million during 2018 which was included in “Selling general and administrative expense” in the Consolidated Statements of Operations. On November 26, 2018, we, certain of our subsidiaries and Exxaro entered into the Completion Agreement. The Completion Agreement provides for the orderly sale of Exxaro’s remaining ownership interest in us, subject to market conditions, helped to facilitate the re-domicile transaction, as well as addressed several legacy issues related to our 2012 acquisition of Exxaro’s mineral sands business. Pursuant to the terms of the Completion Agreement, on May 9, 2019, Exxaro exercised their right under the agreement to sell 14 million shares to us for an aggregate purchase price of approximately $200 million or $14.3185 per share, plus fees of approximately $1 million. The share price was based upon a 5% discount to the 10 day volume weighted average price as of the day that Exxaro exercised their sale notice to us. Upon repurchase of the shares by the Company, the shares were cancelled. As a result of the sale of the 14 million shares on May 9, 2019, we recorded a liability of approximately $4 million which is included in “Accrued liabilities” in our Consolidated Balance Sheets as of December 31, 2019 and which was subsequently paid in January 2020. Furthermore, pursuant to the Completion Agreement, the parties agreed to accelerate our purchase of Exxaro's 26% membership interest in Tronox Sands LLP, a U.K. limited liability partnership ("Tronox Sands"). On February 15, 2019, we completed the redemption of Exxaro's ownership interest in Tronox Sands for consideration of approximately ZAR 2.06 billion (or approximately $148 million in cash), which represented Exxaro's indirect share of the loan accounts in our South African subsidiaries. Tasnee/Cristal On April 10, 2019, we announced the completion of the acquisition of the TiO 2 business of Cristal for $1.675 billion of cash, subject to a working capital and noncurrent liability adjustment, plus 37,580,000 ordinary shares. At December 31, 2020, Cristal International Holdings B.V. (formerly known as Cristal Inorganic Chemical Netherlands Cooperatief W.A.), a wholly-owned subsidiary of Tasnee, continues to own 37,580,000 shares of Tronox, or a 26% ownership interest. In February 2020, Tronox and Cristal resolved the working capital and noncurrent liability adjustment by agreeing that no payment was required by either party. On May 9, 2018, we entered into an Option Agreement with AMIC which is owned equally by Tasnee and Cristal. Under the terms of the Option Agreement, AMIC granted us an option (the “Option”) to acquire 90% of a special purpose vehicle (the “SPV”) which will hold AMIC’s ownership in a titanium slag smelter facility (the “Slagger”) located in The Jazan City for Primary and Downstream Industries in KSA. The Option may be exercised if the Slagger achieves certain production criteria related to sustained quality and tonnage of slag produced (the “Option Criteria”). Likewise, AMIC may require us to acquire the Slagger on the same terms if the Option Criteria are satisfied (the "Put"). If the Option Criteria are met and Cristal exercises the Put or we exercise the Option, AMIC will also contribute $322 million of AMIC indebtedness (the "AMIC Debt") to the SPV before we acquire a 90% ownership in it. In addition, pursuant to the Option Agreement, we agreed to lend AMIC up to $125 million for capital expenditures and operational expenses intended to facilitate the start-up of the Slagger (the “Tronox Loans”). Such funds were drawn down by AMIC and the SPV, as applicable, on a quarterly basis as needed based on a budget reflecting the needs of the Slagger start-up. For the three months and year ended December 31, 2020, we have loaned an additional $12 million and $36 million, respectively, for capital expenditures and operational expenses to facilitate the startup of the Slagger. This brings the total amount that we have lent under the Tronox Loans to equal to the $125 million maximum amount that we agreed to lend. At December 31, 2020 and December 31, 2019, we have recorded $125 million and $89 million respectively for capital expenditures and operational expenses to facilitate the start-up of the Slagger and we have recorded this loan and related interest of $6 million and $3 million respectively within “Other long-term assets". The Option did not have a significant impact on the financial statements as of or for the periods ended December 31, 2020. If the Option Criteria are met and Cristal exercises the Put or we exercise the Option, AMIC will also contribute the Tronox Loans to the SPV before we acquire a 90% ownership in it. On May 13, 2020, we amended the Option Agreement (the "First Amendment") with AMIC to address circumstances in which the Option Criteria cannot be satisfied. Pursuant to the First Amendment, if the Option Criteria are not satisfied, Tronox has the right but not the obligation to acquire the SPV in exchange for its forgiveness of the Tronox Loan, in which case the AMIC Debt will be retained by AMIC and not contributed to the SPV. The First Amendment did not have a significant impact on our financial statements as of or for the period ended December 31, 2020. Additionally, on May 13, 2020, we amended a Technical Services Agreement that we had entered with AMIC on March 15, 2018, to add project management support services. Under this arrangement, AMIC and its consultants are still responsible for engineering and construction of the Slagger while we provide technical advice and project management services including supervision and management of third party consultants intended to satisfy the Option Criteria. As compensation for these services, Tronox receives a monthly management fee of approximately $1 million, which is recorded in “Other income (expense), net” within the Consolidated Statement of Operations and in “Prepaid and other assets” on the Consolidated Balance Sheet. The monthly management fee is subject to certain success incentives if and when the Slagger achieves the Option Criteria. Tronox recorded approximately $2 million and $5 million in "Other Income" for both the three months and year ended December 31, 2020, respectively, in the Consolidated Statement of Operations. At December 31, 2020, Tronox had a receivable due from AMIC related to management fee of $1 million that is recorded within “Prepaid and other assets”. In conjunction with the acquisition on April 10, 2019, we entered into a transition services agreement with Tasnee, Cristal and AMIC. Under the terms of the transition services agreement, Tasnee and its affiliates will provide services to Tronox related to information technology support and infrastructure, logistics, safety, health and environmental, treasury and tax. Similarly, Tronox will provide services to Tasnee and its affiliates for information technology support and infrastructure, finance and accounting, tax, treasury, human resources, logistics, research and development and business development. As part of the transition services agreement, Tronox recorded approximately $1 million as a reduction to "cost of goods sold" on the Consolidated Statement of Operations for the year ended December 31, 2020. In addition, as part of the transition services agreement, Tronox recorded approximately $2 million and $4 million as reduction of "Selling, general and administrative expenses" for the year ended December 31, 2020 and December 31, 2019 respectively on the Consolidated Statement of Operations. The net reduction of cost of goods sold and selling, general and administrative expenses associated with the transition services agreement generally represents a recovery of the related costs. As of December 31, 2020, Tronox had a receivable from AMIC of $1 million recorded within “Prepaid and other assets” on the Consolidated Balance Sheet for expenses paid by Tronox on behalf of AMIC. Similarly, as of December 31, 2020, Tronox had a payable of $2 million recorded within “Accrued liabilities” on the Consolidated Balance Sheet for expenses AMIC paid on behalf of Tronox. Under the acquisition agreement, the stamp duty taxes were agreed to be shared. During the year ended December 31, 2019, Tronox paid $3 million on behalf of Tasnee related to stamp duty taxes. This amount was recorded as a reduction of the total stamp duty taxes paid in "Selling, general and administrative expenses” in the Consolidated Statement of Operations. During 2019, Tasnee prepaid insurance on Tronox's behalf, of which $1 million was expensed to "Cost of goods sold" on the Company's Consolidated Statement of Operations. At December 31, 2020 and December 31, 2019, Tronox had a receivable due from Tasnee of $9 million and $14 million respectively, recorded within “Prepaid and other assets” on the Consolidated Balance Sheet, which relate primarily to amounts arising from transition service agreements, stamp duty taxes paid on behalf of Tasnee, pre-acquisition activities and reimbursement of a tax settlement due to the Australian Taxation Office for pre-acquisition tax periods as discussed in Note 8. At December 31, 2020 and December 31, 2019 Tronox had a payable due to Tasnee of $3 million and $7 million , respectively that are recorded within “Accrued liabilities” on the Consolidated Balance Sheet primarily which relate primarily to pre-acquisition activities and are expected to be settled in the near term. On December 29, 2019, we entered into an agreement with Cristal to acquire certain assets co-located at our Yanbu facility which produce metal grade TiCl 4 ("MGT"). Consideration for the acquisition is the assumption by Tronox of a $36 million note payable to Cristal. The MGT is used at a titanium "sponge" plant facility, 65% of the ownership interests of which are held by Advanced Metal Industries Cluster and Toho Titanium Metal Co. Ltd ("ATTM"), a joint venture between AMIC and Toho Titanium Company Ltd. ATTM uses the TiCl 4 , which we supply by pipeline, for the production of titanium sponge, a precursor material used in the production of titanium metal. On December 17, 2020 we completed the MGT transaction. Repayment of the $36 million note payable is based on a fixed U.S. dollar per metric ton quantity of MGT delivered by us to ATTM over time and therefore the ultimate maturity date is variable in nature. If ATTM fails to purchase MGT from us under certain contractually agreed upon conditions, then at our election we may terminate the MGT supply agreement with ATTM and will no longer owe any amount under the loan agreement with Cristal. We currently estimate the ultimate maturity to be between approximately five and seven years, subject to actual future MGT production levels. The interest rate on the note payable is based on the SAIBOR plus a premium. As of December 31, 2020, the outstanding balance of the note payable was $36 million, of which $5 million is expected to be paid within the next twelve months. As a result of the transactions we have entered into related to the MGT assets, Tronox recorded $1 million and $5 million for purchase of chlorine gas for the three months and year ended December 31, 2020, respectively from ATTM and such amounts are recorded in "Cost of goods sold" on the Consolidated Statement of Operations. The amount due to ATTM as of December 31, 2020 for the purchase of chlorine gas was $3 million and is recorded within “Accrued liabilities” on the Consolidated Balance Sheet. There were no purchases of chlorine gas for the year ended December 31, 2019. In addition, during the three months and year ended December 31, 2020, Tronox recorded $6 million and $25 million, respectively, for MGT sales made to AMIC. During the year ended December 31, 2019, Tronox recorded $5 million for TiCl 4 product sales made to AMIC. The TiCl 4 product sales amounts are recorded in “Net sales” on the Consolidated Statement of Operations. At December 31, 2020 and December 31, 2019, Tronox had a receivable from AMIC of $7 million and $5 million, respectively, from MGT sales that is recorded within “Prepaid and other assets” on the Consolidated Balance Sheet. Prior to the Cristal acquisition, we also acquired TiO 2 feedstock from AMIC for consumption in production of TiO 2

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Segment Information	Segment Information We operate our business under one operating segment, Tronox , which is also our reportable segment. The Company's chief operating decision maker, who is its Co-CEOs, reviews financial information presented at the consolidated level for purposes of allocating resources and evaluating financial performance. Since we operate our business under one segment, there is no difference between our consolidated results and segment results. We disaggregate revenue from contracts with customers by product type and geographic area as well as sales based on country of production. We believe this level of disaggregation appropriately depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors and reflects how our business is managed. During 2020, 2019 and 2018 our ten largest third-party customers represented 32%, 31%, and 37%, respectively, of our consolidated net sales. During 2020, 2019, and 2018, no single customer accounted for 10 % of our consolidated net sales. Net sales to external customers based on country of production, were as follows: Year Ended December 31, 2020 2019 2018 U.S. operations $ 653 $ 676 $ 685 International operations: United Kingdom 301 218 — Australia 637 674 444 South Africa 330 370 444 Other - international 837 704 246 Total net sales $ 2,758 $ 2,642 $ 1,819 See Note 5 for further information on revenues. There is no difference between the total consolidated assets of continuing operations and our segment assets. Property, plant and equipment, net, mineral leaseholds, net, and lease right of use assets, net by geographic region, were as follows: December 31, 2020 2019 U.S. operations $ 261 $ 255 International operations: United Kingdom 101 93 Saudi Arabia 262 215 South Africa 768 799 Australia 995 1,109 Other - international 256 244 Total $ 2,643 $ 2,715

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	Quarterly Results of Operations (Unaudited)The following represents our unaudited quarterly results for the years ended December 31, 2020 and 2019. These quarterly results were prepared in conformity with generally accepted accounting principles and reflect all adjustments that are, in the opinion of management, necessary for a fair statement of the results, and were of a normal recurring nature. Unaudited quarterly results for the year ended December 31, 2020: 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Net sales $ 722 $ 578 $ 675 $ 783 Cost of goods sold 547 449 536 605 Gross profit 175 129 139 178 Net income (loss) from continuing operations 40 (4) 902 57 Net income from discontinued operations, net of tax — — — — Net income (loss) 40 (4) 902 57 Net income attributable to noncontrolling interest 8 — 6 12 Net income (loss) attributable to Tronox Holdings plc $ 32 $ (4) $ 896 $ 45 Net income (loss) per share, basic $ 0.23 $ (0.03) $ 6.24 $ 0.31 Net income (loss) per share, diluted $ 0.22 $ (0.03) $ 6.18 $ 0.31 Unaudited quarterly results for the year ended December 31, 2019: 1st Quarter 2nd Quarter (1) 3rd Quarter (1) 4th Quarter Net sales $ 390 $ 791 $ 768 $ 693 Cost of goods sold 307 672 635 545 Contract loss — 19 — — Gross profit 83 100 133 148 Net (loss) income from continuing operations (30) (55) (12) (5) Net income (loss) from discontinued operations, net of tax — (1) 6 — Net (loss) income (30) (56) (6) (5) Net income attributable to noncontrolling interest 4 6 7 (5) Net (loss) income attributable to Tronox Holdings plc (1) $ (34) $ (62) $ (13) $ — Loss from continuing operations per share, basic and diluted $ (0.27) $ (0.41) $ (0.13) $ — Income from discontinued operations per share, basic and diluted $ — $ — $ 0.04 $ — _____________________ (1) During the third quarter of 2019, we recorded an out-of-period adjustment of $7 million to reduce the tax impact of a transaction related to the Cristal acquisition within income from discontinued operations that should have been recorded in the second quarter of 2019. After evaluating the quantitative and qualitative aspects of the adjustments, we concluded the effect of this adjustment, individually and in the aggregate, was not material to our previously issued interim consolidated financial statements and has no effect to our annual 2019 consolidated financial statements.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation We are considered a domestic company in the United Kingdom and, as such, are required to comply with filing requirements in the United Kingdom. Additionally, we are not considered a “foreign private issuer” in the U.S.; therefore, we are required to comply with the reporting and other requirements imposed by the U.S. securities law on U.S. domestic issuers, which, among other things, requires reporting under accounting principles generally accepted in the United States of America (“U.S. GAAP”). The consolidated financial statements included in this Form 10-K are prepared in conformity with U.S. GAAP. Our consolidated financial statements include the accounts of all majority-owned subsidiary companies. All intercompany balances and transactions have been eliminated in consolidation. Certain prior period amounts have been reclassified to conform to the manner and presentation in the current period.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. It is at least reasonably possible that the effect on the financial statements of a change in estimate due to one or more future confirming events could have a material effect on the financial statements.
Foreign Currency	Foreign Currency The U.S. dollar is our reporting currency for our consolidated financial statements in U.S. GAAP. We determine the functional currency of each subsidiary based on a number of factors, including the predominant currency for revenues, expenditures and borrowings. Adjustments from the remeasurement of non-functional currency monetary assets and liabilities are recorded in “Other income (expense), net” in the Consolidated Statements of Operations. When a subsidiary’s functional currency is not the U.S. dollar, translation adjustments resulting from translating the functional currency financial statements into U.S. dollar equivalents are recorded in “Accumulated other comprehensive loss” in the Consolidated Balance Sheets. Translation adjustments on intercompany foreign currency receivables and payables that are not expected to be settled in the foreseeable future are reported in the same manner as translation adjustments.
Revenue Recognition	Revenue RecognitionWe recognize revenue at a point in time when the customer obtains control of the promised products. For most transactions this occurs when products are shipped from our manufacturing facilities or at a later point when control of the products transfers to the customer at a specified destination or time. All amounts billed to a customer in a sales transaction related to shipping and handling represent revenues earned and are reported as “Net sales” in the Consolidated Statements of Operations. Accruals are made for sales returns, rebates and other allowances, which are recorded in “Net sales” in the Consolidated Statements of Operations and are based on our historical experience and current business conditions. Additionally, we have elected the practical expedient to exclude sales taxes and similar taxes that we collect from customers on behalf of government authorities from the revenue transaction price. See Note 5.
Cost of Goods Sold	Cost of Goods Sold Cost of goods sold includes costs for purchasing, receiving, manufacturing, and distributing products, including raw materials, energy, labor, depreciation, depletion, shipping and handling, freight, warehousing, and other production costs.
Research and Development	Research and Development Research and development costs, included in “Selling, general and administrative expenses” in the Consolidated Statements of Operations comprised of salaries, building costs, utilities, administrative expenses, third party research, and allocations of corporate costs, were $12 million, $17 million, and $11 million during 2020, 2019, and 2018, respectively, and were expensed as incurred.
Selling, General and Administrative Expenses	Selling, General and Administrative Expenses Selling, general and administrative expenses include costs related to marketing, research and development, agent commissions, and legal and administrative functions such as corporate management, human resources, information technology, investor relations, accounting, treasury, and tax compliance.
Income Taxes	Income Taxes We use the asset and liability method of accounting for income taxes. The estimation of the amounts of income taxes involves the interpretation of complex tax laws and regulations and how foreign taxes affect domestic taxes, as well as the analysis of the realizability of deferred tax assets, tax audit findings, and uncertain tax positions. Deferred tax assets and liabilities are determined based on temporary differences between the financial reporting and tax bases of assets and liabilities using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. A valuation allowance is provided against a deferred tax asset when it is more likely than not that all or some portion of the deferred tax asset will not be realized. We periodically assess the likelihood that we will be able to recover our deferred tax assets, and reflect any changes in our estimates in the valuation allowance, with a corresponding adjustment to earnings or other comprehensive income (loss), as appropriate. All available positive and negative evidence is weighted to determine whether a valuation allowance should be recorded.
Earnings Per Share	Earnings per Share Basic and diluted earnings per share are calculated using the two-class method. Under the two-class method, earnings used to determine basic earnings per share are reduced by an amount allocated to participating securities. Participating securities include restricted shares issued under the Tronox Management Equity Incentive Plan (the “MEIP”) (see Note 22), which contains non-forfeitable dividend rights. Our unexercised options and unvested restricted share units do not contain non-forfeitable rights to dividends and, as such, are not considered in the calculation of basic earnings per share. Our unvested restricted shares do not have a contractual obligation to share in losses; therefore, when we record a net loss, none of the loss is allocated to participating securities. Consequently, in periods of net loss, the two-class method does not have an effect on basic loss per share.
Fair Value Measurement	Fair Value Measurement We measure fair value on a recurring basis utilizing valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs, to the extent possible, and consider counterparty credit risk in our assessment of fair value. The fair value hierarchy is as follows: • Level 1 – Quoted prices in active markets for identical assets and liabilities; • Level 2 – Quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active or other inputs that are observable or can be corroborated by observable market data; and, • Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets and liabilities See Note 17.
Cash and Cash Equivalents	Cash and Cash Equivalents We consider all investments with original maturities of three months or less to be cash equivalents. We maintain cash and cash equivalents in bank deposit and money market accounts that may exceed federally insured limits. The financial institutions where our cash and cash equivalents are held are generally highly rated and geographically dispersed, and we have a policy to limit the amount of credit exposure with any one institution. We have not experienced any losses in such accounts and believe we are not exposed to significant credit risk.
Accounts Receivable, net of allowance for credit losses	Accounts Receivable, net of allowance for credit losses We perform credit evaluations of our customers, and take actions deemed appropriate to mitigate credit risk. Only in certain specific occasions do we require collateral in the form of bank or parent company guarantees or guarantee payments. We maintain allowances for potential credit losses based on specific customer review and current financial conditions.
Inventories, net	Inventories, net Pigment inventories are stated at the lower of actual cost and net realizable value, net of allowances for obsolete and slow-moving inventory. The cost of inventories is determined using the first-in, first-out method. Carrying values include material costs, labor, and associated indirect manufacturing expenses. Costs for materials and supplies, excluding titanium ore, are determined by average cost to acquire. Feedstock and co-products inventories including titanium ore are stated at the lower of the weighted-average cost of production or market. Inventory costs include those costs directly attributable to products, including all manufacturing overhead but excluding distribution costs. Raw materials are carried at actual cost. We review the cost of our inventory in comparison to its net realizable value. We also periodically review our inventory for obsolescence. In either case, we record any write-down equal to the difference between the cost of inventory and its estimated net realizable value based on assumptions about alternative uses, market conditions and other factors. Inventories expected to be sold or consumed within twelve months after the balance sheet date are classified as current assets and all other inventories are classified as non-current assets. See Note 10.
Long Lived Assets	Long Lived Assets Property, plant and equipment, net is stated at cost less accumulated depreciation, and is depreciated over its estimated useful life using the straight-line method as follows: Land improvements 10 — 20 years Buildings 10 — 40 years Machinery and equipment 3 — 25 years Furniture and fixtures 10 years Maintenance and repairs are expensed as incurred, except for costs of replacements or renewals that improve or extend the lives of existing properties, which are capitalized. Upon retirement or sale, the cost and related accumulated depreciation are removed from the respective account, and any resulting gain or loss is included in “Cost of goods sold” or “Selling, general, and administrative expenses” in the Consolidated Statements of Operations. See Note 11. We capitalize interest costs on major projects that require an extended period of time to complete. See Note 15. Mineral property acquisition costs are capitalized as tangible assets when management determines that probable future benefits consisting of a contribution to future cash inflows have been identified and adequate financial resources are available or are expected to be available as required to meet the terms of property acquisition and anticipated exploration and development expenditures. Mineral leaseholds are depleted over their useful lives as determined under the units of production method. Mineral property exploration costs are expensed as incurred. When it has been determined that a mineral property can be economically developed as a result of establishing proven and probable reserves, the costs incurred to develop such property through the commencement of production are capitalized. See Note 12. Intangible assets are stated at cost less accumulated amortization and are amortized on a straight-line basis over their estimated useful lives, which generally range from 3 to 20 years. See Note 13. We evaluate the recoverability of the carrying value of long-lived assets that are held and used whenever events or changes in circumstances indicate that the carrying value may not be recoverable. Under such circumstances, we assess whether the projected undiscounted cash flows of our long-lived assets are sufficient to recover the carrying amount of the asset group being assessed. If the undiscounted projected cash flows are not sufficient, we calculate the impairment amount by discounting the projected cash flows using our weighted-average cost of capital. For assets that satisfy the criteria to be classified as held for sale, an impairment loss, if any, is recognized to the extent the carrying amount exceeds fair value, less cost to sell. The amount of the impairment of long-lived assets is written off against earnings in the period in which the impairment is determined.
Business Acquisitions	Business Acquisitions Business acquisitions are accounted for using the acquisition method under Accounting Standards Codification (“ASC”) 805, Business Combinations (“ASC 805”), which requires recording assets acquired and liabilities assumed at fair value as of the acquisition date. Under the acquisition method of accounting, each tangible and separately identifiable intangible asset acquired and liabilities assumed is recorded based on their preliminary estimated fair values on the acquisition date. The initial valuations are derived from estimated fair value assessments and assumptions used by management. Acquisition related costs are expensed as incurred and are included in “Selling, general and administrative expenses” in the Consolidated Statements of Operations.
Leases	Leases We determine if a contract is or contains a lease at inception of the contract. Our leases are primarily operating leases. Leased assets primarily include office buildings, rail cars and motor vehicles, forklifts, and other machinery and equipment. Our leases primarily have fixed lease payments, with real estate leases typically requiring additional payments for real estate taxes and occupancy-related costs. Certain of our leases also have variable lease payments. Variable lease payments that depend on an index or a rate (such as the Consumer Price Index) are included in our initial measurement of the lease right of use assets and lease liabilities. Variable lease payments that are not index or rate based (such as variable payments based on our performance or use of the leased assets) are recorded as expenses when incurred and excluded from the measurement of right of use assets and lease liabilities. Our leases typically have initial lease terms ranging from 1 to 25 years. Some of our lease agreements include options to renew, extend or early terminate the leases. Lease term is the non-cancellable period of a lease, adjusted by the period covered by an option to extend or terminate the lease if we are reasonably certain to exercise (or not exercise) that option. Our operating leases typically do not contain purchase options we expect to exercise, residual value guarantees or other material covenants. Operating leases are recorded under “Lease right of use assets”, “Short-term lease liabilities”, and “Long-term lease liabilities” on the Consolidated Balance Sheets. Finance leases are recorded under “Property, plant and equipment net”, “Long-term debt due within one year”, and “Long-term debt” on the Consolidated Balance Sheets. Operating lease right of use ("ROU") assets and lease liabilities are initially recorded at the present value of the future minimum lease payments over the lease term at the commencement date or the acquisition date for leases acquired in the Cristal Transaction. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at the lease commencement date in
Long-term Debt	Long-term Debt Long-term debt is stated net of unamortized original issue premium or discount. Premiums or discounts are amortized using the effective interest method with amortization expense recorded in “Interest and debt expense, net” in the Consolidated Statements of Operations. Deferred debt issuance costs related to a recognized debt liability are presented in the Consolidated Balance Sheets as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts and are amortized using the effective interest method with amortization expense recorded in “Interest and debt expense, net” in the Consolidated Statements of Operations. See Note 15.
Asset Retirement Obligations	Asset Retirement Obligations Asset retirement obligations are recorded at their estimated fair value, and accretion expense is recognized over time as the discounted liability is accreted to its expected settlement value. Fair value is measured using expected future cash outflows discounted at our credit-adjusted risk-free interest rate, which are considered Level 3 inputs. We classify accretion expense related to asset retirement obligations as a production cost, which is included in “Cost of goods sold” in the Consolidated Statements of Operations. See Note 19.
Environmental Remediation and Other Contingencies	Environmental Remediation and Other Contingencies We record an undiscounted liability when litigation has commenced or a claim or assessment has been asserted, or, based on available information, commencement of litigation or assertion of a claim or assessment is probable, and the associated costs can be reasonably estimated. See Note 20.
Self-Insurance	Self-Insurance We are self-insured for certain levels of general and vehicle liability, property, workers’ compensation and health care coverage. The cost of these self-insurance programs is accrued based upon estimated fully developed settlements for known and anticipated claims. Any resulting adjustments to previously recorded reserves are reflected in current operating results. We do not accrue for general or unspecific business risks.
Share-based Compensation	Share-based Compensation Equity Restricted Share and Restricted Share Unit Awards — The fair value of equity instruments is measured based on the share price on the grant date and is recognized over the vesting period. These awards contain service, market, and/or performance conditions. For awards containing only a service or a market condition, we have elected to recognize compensation costs using the straight-line method over the requisite service period for the entire award. For awards containing a market condition, the fair value of the award is measured using the Monte Carlo simulation under a lattice model approach. For awards containing a performance condition, the fair value is the grant date close price and compensation expense is not recognized until we conclude that it is probable that the performance condition will be met. We reassess the probability at least quarterly. See Note 22.
Defined Benefit Pension and Postretirement Benefit Plans	Defined Benefit Pension and Postretirement Benefit Plans We recognize the funded status of our defined benefit pension plans and postretirement benefit plans in the Consolidated Balance Sheets. The funded status is measured as the difference between the fair value of plan assets and the benefit obligation at the measurement date. The benefit obligation for the defined benefit plans is the projected benefit obligation (PBO), which represents the actuarial present value of benefits expected to be paid upon retirement based on employee services already rendered and estimated future compensation levels. The benefit obligation for our postretirement benefit plans is the accumulated postretirement benefit obligation (APBO), which represents the actuarial present value of postretirement benefits attributed to employee services already rendered. The fair value of plan assets related to our defined benefit plan represents the current market value of assets held in a trust fund, which is established for the sole benefit of plan participants. If the fair value of plan assets exceeds the benefit obligation, the plan is overfunded, and the excess is recorded as a prepaid pension asset. On the other hand, if the benefit obligation exceeds the fair value of plan assets, the plan is underfunded, and the deficit is recorded as pension and postretirement healthcare benefits obligation in the Consolidated Balance Sheet. The portion of the pension and postretirement healthcare obligations payable within the next 12 months is recorded in accrued liabilities in the Consolidated Balance Sheet. Net periodic pension and postretirement benefit cost represents the aggregation of service cost, interest cost, expected return on plan assets, amortization of prior service costs or credits and actuarial gains or losses previously recognized as a component of OCI and it is recorded in the Consolidated Statement of Operations. Net periodic cost is recorded in cost of goods sold and selling, general and administrative expenses in the Consolidated Statement of Operations based on the employees’ respective functions. Actuarial gains or losses represents the effect of remeasurement on the benefit obligation principally driven by changes in the plan actuarial assumptions. Prior service costs or credits arise from plan amendments. The actuarial gains or losses and prior service costs or credits are initially recognized as a component of Other Comprehensive income in the Consolidated Statement of Comprehensive Income (Loss). Those gains or losses and prior service costs or credits are subsequently recognized as a component of net periodic cost. The measurement of benefit obligations and net periodic cost is based on estimates and assumptions approved by management. These valuations reflect the terms of the plans and use participant-specific information such as compensation, age and years of service, as well as certain assumptions, including estimates of discount rates, expected return on plan assets, rate of compensation increases and mortality rates. Defined Contribution Plans — We recognize our contribution as expense when they are due. The expense is recorded in cost of goods sold or selling, general and administrative expenses the Consolidated Statement of Operations based on the employees’ respective functions. Multiemployer Plan — We treat our multiemployer plan like a defined contribution plan. A pension plan to which two or more unrelated employers contribute is generally considered to be a multiemployer plan. As a defined contribution plan, we recognize the contribution for the period as a net benefit cost and any contributions due and unpaid as a liability.
Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncements In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (“Topic 820”): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. The standard modifies the disclosure requirements in Topic 820, Fair Value Measurement, by: removing certain disclosure requirements related to the fair value hierarchy; modifying existing disclosure requirements related to measurement uncertainty; and adding new disclosure requirements, such as disclosing the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and disclosing the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. This standard is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2019, with early adoption permitted. We adopted this standard on January 1, 2020 and it did not have a material impact on the Company's consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), as amended. The standard introduces a new accounting model for expected credit losses on financial instruments, including trade receivables, based on estimates of current expected credit losses (CECL). This standard became effective on January 1, 2020, and had an immaterial impact on the Company's consolidated financial statements as our historical bad debt expense has not been material. Recently Issued Accounting Pronouncements In December 2019, the FASB issued ASU 2019-12, Income Taxes (“Topic 740”): Simplifying the Accounting for Income Taxes. The standard simplifies the accounting for income taxes by removing the exceptions to the incremental approach for intraperiod tax allocation, the requirement to recognize deferred tax liability for equity method investments, the ability not to recognize a deferred tax liability for a foreign subsidiary when a foreign equity method investment becomes a subsidiary, and the general methodology for calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. This standard is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2020 with early adoption permitted. We do not believe this standard will have a material impact on our consolidated financial statements.

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Estimated Useful Lives for Property, Plant and Equipment	Property, plant and equipment, net is stated at cost less accumulated depreciation, and is depreciated over its estimated useful life using the straight-line method as follows: Land improvements 10 — 20 years Buildings 10 — 40 years Machinery and equipment 3 — 25 years Furniture and fixtures 10 years

Acquisitions and Related Dive_2

Acquisitions and Related Divestitures (Tables)	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Purchase Price Allocation	The final purchase price consideration and estimated fair value of Cristal’s net assets acquired on April 10, 2019 are shown below. The assets and liabilities of Cristal's North American TiO 2 business, that was subsequently divested on May 1, 2019, are shown as held for sale in the fair value of assets acquired and liabilities assumed (refer to Note 6). Fair Value Purchase Price Consideration: Tronox Holdings plc shares issued 37,580,000 Tronox Holdings plc closing price per share on April 10, 2019 $ 14.00 Total fair value of Tronox Holdings plc shares issued at acquisition date $ 526 Cash consideration paid $ 1,675 Total Purchase Price $ 2,201
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	Fair Value Fair Value of Assets Acquired Accounts receivable $ 251 Inventory 689 Deferred taxes 51 Prepaid and other assets 81 Property, plant and equipment 759 Mineral leaseholds 95 Intangible assets 64 Lease right of use assets 40 Other long-term assets 43 Assets held for sale 850 Total assets acquired $ 2,923 Less: Liabilities Assumed Accounts payable $ 102 Accrued liabilities 137 Short-term lease liabilities 13 Deferred tax liabilities 2 Pension and postretirement healthcare benefits 76 Environmental liabilities 72 Asset retirement obligations 75 Long-term debt 22 Long-term lease liabilities 24 Other long-term liabilities 20 Liabilities held for sale 131 Total liabilities assumed $ 674 Less noncontrolling interest 48 Purchase price $ 2,201
Pro Forma Information	In accordance with ASC 805, the supplemental pro forma results of operations for the years ended December 31, 2019 and 2018, as if the Cristal Transaction had occurred on January 1, 2018, are as follows: Year Ended December 31 2019 2018 Net Sales $ 3,008 $ 3,339 Net income from continuing operations attributable to Tronox Holdings plc $ 18 $ 32

Restructuring Initiatives (Tabl

Restructuring Initiatives (Tables)	12 Months Ended
	Dec. 31, 2020
Restructuring and Related Activities [Abstract]
Schedule of Liability Balance for Restructuring	The liability balance for restructuring as of December 31, 2020 and 2019, which is recorded within “Accrued liabilities” in the Consolidated Balance Sheet, is as follows: Employee-Related Costs Balance, January 1, 2019 $ — Charges 22 Cash payments (12) Balance, December 31, 2019 $ 10 Charges 3 Cash payments (11) Balance, December 31, 2020 $ 2

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	Net sales to external customers by geographic areas where our customers are located were as follows: Year Ended December 31, 2020 2019 2018 North America $ 794 $ 696 $ 649 South and Central America 315 164 72 Europe, Middle-East and Africa 879 954 541 Asia Pacific 770 828 557 Total net sales $ 2,758 $ 2,642 $ 1,819 Net sales from external customers for each similar type of product were as follows: Year Ended December 31, 2020 2019 2018 TiO 2 $ 2,176 $ 2,049 $ 1,230 Zircon 283 290 293 Feedstock and other products 299 303 259 Electrolytic — — 37 Total net sales $ 2,758 $ 2,642 $ 1,819

Discontinued Operations and O_2

Discontinued Operations and Other Disposition (Tables)	12 Months Ended
	Dec. 31, 2020
Discontinued Operations and Disposal Groups [Abstract]
Summary of Operations of Discontinued Operation	The following table presents a summary of the operations of Cristal’s North American TiO 2 business and Cristal Metals line items constituting the "Income from discontinued operations, net of tax" in our Consolidated Statements of Operations for the year ended December 31, 2019. There were no discontinued operations in 2020 and 2018. Year ended December 31, 2019 Net sales $ 41 Cost of goods sold 29 Gross profit 12 Selling, general and administrative expense and other expenses 5 Income before income taxes 7 Income tax provision 2 Income from discontinued operations, net of tax $ 5

Other Income (Expense), Net (Ta

Other Income (Expense), Net (Tables)	12 Months Ended
	Dec. 31, 2020
Other Income and Expenses [Abstract]
Other Income (Expense), Net	Other income (expense), net is comprised of the following: Year Ended December 31, 2020 2019 2018 Net realized and unrealized foreign currency gains (losses) $ 4 $ 5 $ 29 Pension and postretirement benefit interest cost, expected return on assets and amortization of actuarial losses 1 (1) (2) Pension and postretirement benefit settlement and curtailment gains (1) 2 1 3 Insurance proceeds (2) 11 — — AMIC technical service support fee (Note 24) 5 — — Other, net 3 (2) 3 Total $ 26 $ 3 $ 33 _____________________ (1) 2020 and 2019 amounts are curtailment gains related to our former U.S. Pension Plan (acquired as part of the Cristal Transaction). 2018 gain relates to our former U.S. retiree medical plan. See Note 23. (2) 2020 amount represents reimbursement from claims related to the Ginkgo concentrator failure we inherited as a part of the Cristal Transaction.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income (Loss) From Continuing Operations Before Income Taxes	Income (loss) from continuing operations before income taxes is comprised of the following: Year Ended December 31, 2020 2019 2018 United Kingdom $ (12) $ 56 $ (122) International 126 (144) 165 Income (loss) from continuing operations before income taxes $ 114 $ (88) $ 43
Income Tax (Provision) Benefit	The income tax (provision) benefit is summarized below: Year Ended December 31, 2020 2019 2018 United Kingdom: Current $ (1) $ — $ (1) Deferred (10) 11 3 International: Current (17) (23) (33) Deferred 909 (2) 18 Income tax (provision) benefit $ 881 $ (14) $ (13)
Effective Income Tax Rate Reconciliation	The following table reconciles the applicable statutory income tax rates to our effective income tax rates for “Income tax (provision) benefit” as reflected in the Consolidated Statements of Operations. Year Ended December 31, 2020 2019 2018 Statutory tax rate 19 % 19 % 19 % Increases (decreases) resulting from: Tax rate differences 10 5 24 Disallowable expenditures 17 (29) 88 Valuation allowances (849) (44) (474) Corporate Reorganization (97) — — Tax rate changes (9) 17 41 State and local taxes 5 (7) 8 Prior year accruals 131 24 368 Branch taxation — (1) (37) Deferred gross margin — (4) (9) Other, net — 4 2 Effective tax rate (773) % (16) % 30 %
Net Deferred Tax Assets (Liabilities)	Net deferred tax assets (liabilities) at December 31, 2020 and 2019 were comprised of the following: December 31, 2020 2019 Deferred tax assets: Net operating loss and other carryforwards $ 1,788 $ 1,899 Property, plant and equipment, net 153 115 Reserves for environmental remediation and restoration 46 45 Obligations for pension and other employee benefits 57 58 Investments 3 28 Grantor trusts 637 615 Inventories, net 8 10 Interest 232 243 Lease liabilities 21 27 Other accrued liabilities 6 10 Foreign exchange 1 — Other 8 11 Total deferred tax assets 2,960 3,061 Valuation allowance associated with deferred tax assets (1,826) (2,791) Net deferred tax assets 1,134 270 Deferred tax liabilities: Inventories, net (2) (6) Property, plant and equipment, net (226) (242) Intangible assets, net (30) (45) Lease assets (22) (28) Foreign exchange — (9) Other (10) (14) Total deferred tax liabilities (290) (344) Net deferred tax liability $ 844 $ (74) Balance sheet classifications: Deferred tax assets — long-term $ 1,020 $ 110 Deferred tax liabilities — long-term $ (176) $ (184) Net deferred tax liability $ 844 $ (74)
Changes in Valuation Allowance by Jurisdiction	The table below sets forth the changes, by jurisdiction: December 31, 2020 2019 2018 United Kingdom $ (1) $ (2) $ 8 United States (944) 54 (12) Australia (17) 89 (144) The Netherlands 2 — (57) Saudi Arabia 11 — — Brazil (14) 14 — Switzerland — 15 — Belgium (2) 2 — Total (decrease) increase in valuation allowances $ (965) $ 172 $ (205)
Expiration of Tax Loss Carryforwards	In the United States, the deferred tax assets generate by tax loss carryforwards are partially offset by a valuation allowance to the extent they are subject to expiration. The expiration of these carryforwards at December 31, 2020 is shown below. The Australian, Saudi Arabian, French, Brazilian and United Kingdom tax loss carryforwards do not expire. 2021 2022 2023 2024 2025 2026 - 2039 Unlimited Total Tax Loss Carryforwards United Kingdom $ — $ — $ — $ — $ — $ — $ (62) $ (62) Australia — — — — — — (358) (358) The Netherlands (8) (35) (39) (19) (26) (131) — (258) France — — — — — — (242) (242) Saudi Arabia — — — — — — (37) (37) Switzerland — (101) (80) — — — — (181) U.S. Federal — — — — — (4,082) (320) (4,402) U.S. State (3) (3) (25) (12) (41) (4,073) (18) (4,175) Other — — — — — — (7) (7) Total tax loss carryforwards $ (11) $ (139) $ (144) $ (31) $ (67) $ (8,286) $ (1,044) $ (9,722)

Income (Loss) Per Share (Tables

Income (Loss) Per Share (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Computation of Basic and Diluted Loss per Share	The computation of basic and diluted income per share for the periods indicated is as follows: Year Ended December 31, 2020 2019 2018 Numerator – Basic and Diluted: Net income (loss) from continuing operations $ 995 $ (102) $ 30 Less: Net income from continuing operations attributable to noncontrolling interest 26 12 37 Undistributed net income (loss) from continuing operations attributable to Tronox Holdings plc 969 (114) (7) Net income from discontinued operations available to ordinary shares — 5 — Net income (loss) available to ordinary shares $ 969 $ (109) $ (7) Denominator – Basic and Diluted: Weighted-average ordinary shares, basic (in thousands) 143,355 139,859 122,881 Weighted-average ordinary shares, diluted (in thousands) 144,906 139,859 122,881 Net income (loss) per Ordinary Share: Basic net income (loss) from continuing operations per ordinary share $ 6.76 $ (0.81) $ (0.06) Basic net income (loss) from discontinued operations per ordinary share — 0.03 — Basic net income (loss) per ordinary share $ 6.76 $ (0.78) $ (0.06) Diluted net income (loss) from continuing operations per ordinary share $ 6.69 $ (0.81) $ (0.06) Diluted net income (loss) from discontinued operations per ordinary share — 0.03 — Diluted net income (loss) per ordinary share $ 6.69 $ (0.78) $ (0.06)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	Anti-dilutive shares not recognized in the diluted net income per share calculation for the years ended December 31, 2020, 2019 and 2018 were as follows: Shares 2020 2019 2018 Options 1,201,891 1,260,902 1,319,743 Restricted share units 1,054,994 5,557,659 5,336,433

Inventories, net (Tables)

Inventories, net (Tables)	12 Months Ended
	Dec. 31, 2020
Inventory Disclosure [Abstract]
Inventories, Net	Inventories, net consisted of the following: December 31, 2020 2019 Raw materials $ 170 $ 205 Work-in-process 103 129 Finished goods, net 668 573 Materials and supplies, net 196 224 Inventories, net - current $ 1,137 $ 1,131

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net of Accumulated Depreciation	Property, plant and equipment, net of accumulated depreciation, consisted of the following: December 31, 2020 2019 Land and land improvements $ 189 $ 191 Buildings 368 340 Machinery and equipment 2,197 2,028 Construction-in-progress 192 156 Other 86 54 Total 3,032 2,769 Less: accumulated depreciation (1,273) (1,007) Property, plant and equipment, net $ 1,759 $ 1,762
Depreciation Expense Related to Property, Plant and Equipment	The table below summarizes depreciation expense related to property, plant and equipment for the periods presented, recorded in the specific line items in our Consolidated Statements of Operations: Year Ended December 31, 2020 2019 2018 Cost of goods sold $ 233 $ 189 $ 131 Selling, general and administrative expenses 5 5 3 Total $ 238 $ 194 $ 134

Mineral Leaseholds, net (Tables

Mineral Leaseholds, net (Tables)	12 Months Ended
	Dec. 31, 2020
Extractive Industries [Abstract]
Mineral Leaseholds, Net of Accumulated Depletion	Mineral leaseholds, net of accumulated depletion, consisted of the following: December 31, 2020 2019 Mineral leaseholds $ 1,333 $ 1,352 Less accumulated depletion (530) (500) Mineral leaseholds, net $ 803 $ 852

Intangible Assets, net (Tables)

Intangible Assets, net (Tables)	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets, Net of Accumulated Amortization	Intangible Assets, net of accumulated amortization, consisted of the following: December 31, 2020 December 31, 2019 Gross Cost Accumulated Amortization Net Carrying Amount Gross Cost Accumulated Amortization Net Carrying Amount Customer relationships $ 291 $ (193) $ 98 $ 291 $ (173) $ 118 TiO 2 technology 93 (24) 69 92 (17) 75 Internal-use software and other 73 (39) 34 49 (34) 15 Intangible assets, net $ 457 $ (256) $ 201 $ 432 $ (224) $ 208
Amortization Expense Related to Intangible Assets	Year Ended December 31, 2020 2019 2018 Cost of goods sold $ 2 $ 2 $ 1 Selling, general and administrative expenses 31 28 25 Total $ 33 $ 30 $ 26

Balance Sheet and Cash Flows _2

Balance Sheet and Cash Flows Supplemental Information (Tables)	12 Months Ended
	Dec. 31, 2020
Payables and Accruals [Abstract]
Accrued Liabilities	Accrued liabilities consisted of the following: December 31, 2020 2019 Employee-related costs and benefits $ 133 $ 103 Related party payables 7 7 Interest 21 16 Sales rebates 43 39 Restructuring 2 10 Taxes other than income taxes 16 6 Asset retirement obligations 9 16 Interest rate swaps 57 22 Professional fees and other 62 60 Liabilities held for sale — 4 Accrued liabilities $ 350 $ 283
Schedule of Cash Flow, Supplemental Disclosures	Additional supplemental cash flow information for the year ended December 31, 2020 and 2019 and as of December 31, 2020 and December 31, 2019 is as follows: Year Ended December 31, Supplemental non cash information: 2020 2019 Investing activities- shares issued in the Cristal Transaction $ — $ 526 Financing activities- debt assumed in the Cristal Transaction $ — $ 22 Investing activities - Acquisition of MGT assets $ 36 $ — Financing activities - debt assumed in the acquisition of MGT assets $ 36 $ — December 31, 2020 December 31, 2019 Capital expenditures acquired but not yet paid $ 37 $ 23

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Long-Term Debt, Net of Unamortized Discount and Debt Issuance Costs	Long-term debt, net of an unamortized discount and debt issuance costs, consisted of the following: Original Annual Maturity December 31, December 31, Term Loan Facility, net of unamortized discount (1) $ 2,150 Variable 9/22/2024 $ 1,607 $ 1,805 Senior Notes due 2025 450 5.75 % 10/1/2025 450 450 Senior Notes due 2026 615 6.50 % 4/15/2026 615 615 6.5% Senior Secured Notes due 2025 500 6.50 % 5/1/2025 500 — Standard Bank Term Loan Facility (1) 222 Variable 3/25/2024 115 158 Tikon Loan N/A Variable 5/23/2021 17 16 Australian Government Loan, net of unamortized discount N/A N/A 12/31/2036 1 1 MGT Loan (2) 36 Variable Refer below 36 — Finance leases 15 15 Long-term debt 3,356 3,060 Less: Long-term debt due within one year (58) (38) Debt issuance costs (35) (34) Long-term debt, net $ 3,263 $ 2,988 (1) The average effective interest rate, including impacts of our interest rate swap, for the Term Loan Facility was 4.6% and 5.6% for the years ended December 31, 2020 and 2019, respectively. The average effective interest rate on the Standard Bank Term Loan Facility was 7.8% and 9.7% for the year ended December 31, 2020 and 2019, respectively. (2) The MGT loan is a related party debt facility. Refer below for further details.
Schedule of Maturities of Long-term Debt	At December 31, 2020, the scheduled maturities of our long-term debt were as follows: Total Borrowings 2021 58 2022 44 2023 44 2024 1,631 2025 959 Thereafter 629 Total 3,365 Remaining accretion associated with the Term Loan Facility and Australian Government Loan (9) Total borrowings 3,356
Interest and Debt Expense, Net	Interest and debt expense, net in the Consolidated Statements of Operations consisted of the following: Year Ended December 31, 2020 2019 2018 Interest on debt $ 174 $ 186 $ 180 Amortization of deferred debt issuance costs and discounts on debt 10 8 11 Capitalized interest (2) (1) (3) Interest on capital leases and letters of credit and commitments 7 8 5 Total interest and debt expense, net $ 189 $ 201 $ 193

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Fair Value of Derivatives Outstanding	The following table is a summary of the fair value of derivatives outstanding at December 31, 2020 and 2019: Fair Value December 31, 2020 December 31, 2019 Assets(a) Accrued Liabilities Assets(a) Accrued Liabilities Derivatives Designated as Cash Flow Hedges Currency Contracts $ 58 $ — $ 30 $ — Interest Rate Swaps $ — $ 57 $ — $ 22 Total Hedges $ 58 $ 57 $ 30 $ 22 Derivatives Not Designated as Cash Flow Hedges Currency Contracts $ 7 $ — $ 7 $ — Total Derivatives $ 65 $ 57 $ 37 $ 22 (a) At December 31, 2020, current assets of $65 million are recorded in prepaid and other current assets on the Consolidated Balance Sheet. At December 31, 2019, current assets of $34 million were recorded in prepaid and other current assets and long-term assets of $3 million are recorded in other long-term assets on the Consolidated Balance Sheet.
Schedule of Derivatives Instruments Impact on Statement of Operations	The following table summarizes the impact of the Company's derivatives on the Consolidated Statement of Operations: Amount of Pre-Tax Gain (Loss) Recognized in Earnings Amount of Pre-Tax Gain (Loss) Recognized in Earnings Revenue Cost of Goods Sold Other Income (Expense), net Revenue Cost of Goods Sold Other Income (Expense), net Year Ended December 31, 2020 Year Ended December 31, 2019 Derivatives Not Designated as Hedging Instruments Currency Contracts $ — $ — $ 4 $ — $ — $ 7 Derivatives Designated as Hedging Instruments Currency Contracts $ (7) $ 3 $ — $ 5 $ 3 $ — Total Derivatives $ (7) $ 3 $ 4 $ 5 $ 3 $ 7

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value, by Balance Sheet Grouping	The following table presents the fair value of our debt and derivative contracts at both December 31, 2020 and December 31, 2019: December 31, December 31, Term Loan Facility $ 1,610 $ 1,820 Standard Bank Term Loan Facility 115 158 Senior Notes due 2025 468 459 Senior Notes due 2026 641 636 6.5% Senior Secured Notes due 2025 536 — Tikon Loan 17 16 Australian Government Loan 1 1 MGT Loan 36 — Interest rate swaps 57 22 Foreign currency contracts, net 65 37

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Lease Costs	Lease expense for the year ended December 31, 2020 and December 31, 2019 was comprised of the following: Year Ended December 31, 2020 2019 Operating lease expense $ 48 $ 41 Finance lease expense: Amortization of right-of-use assets 1 1 Interest on lease liabilities 2 2 Short term lease expense 26 22 Variable lease expense 22 20 Total lease expense $ 99 $ 86 The table below summarizes lease expense for the year ended December 31, 2020 and December 31, 2019, recorded in the specific line items in our Consolidated Statements of Operations: Year Ended December 31, 2020 2019 Cost of goods sold $ 91 $ 80 Selling, general and administrative expenses 8 6 Total $ 99 $ 86 The weighted-average remaining lease term in years and weighted-average discount rates at December 31, 2020 and December 31, 2019 were as follows: December 31, 2020 December 31, 2019 Weighted-average remaining lease term: Operating leases 3.3 3.7 Finance leases 9.6 10.4 Weighted-average discount rate: Operating leases 7.7 % 8.5 % Finance leases 14.2 % 14.2 % Additional information relating to cash flows and ROU assets for the year ended December 31, 2020 and 2019 is as follows: December 31, 2020 December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows used for operating leases $ 55 $ 41 Operating cash flows used for finance leases $ 2 $ 2 Financing cash flows used for finance leases $ 1 $ 1
Maturities of Operating Lease Liabilities	The maturity analysis for operating leases and finance leases at December 31, 2020 were as follows: Operating Leases Finance Leases 2021 $ 44 $ 3 2022 23 3 2023 9 3 2024 7 3 2025 2 3 Thereafter 6 12 Total lease payments 91 27 Less: imputed interest (11) (12) Present value of lease payments $ 80 $ 15
Maturities of Finance Lease Liabilities	The maturity analysis for operating leases and finance leases at December 31, 2020 were as follows: Operating Leases Finance Leases 2021 $ 44 $ 3 2022 23 3 2023 9 3 2024 7 3 2025 2 3 Thereafter 6 12 Total lease payments 91 27 Less: imputed interest (11) (12) Present value of lease payments $ 80 $ 15
Additional Information Relating to ROU Assets	Additional information relating to ROU assets for the year ended December 31, 2020 and 2019 is as follows: Year Ended December 31, 2020 2019 ROU assets obtained in exchange for lease obligations: Operating leases obtained in the normal course of business $ 29 $ 28 Operating leases acquired in connection with Cristal acquisition $ — $ 40

Asset Retirement Obligations (T

Asset Retirement Obligations (Tables)	12 Months Ended
	Dec. 31, 2020
Asset Retirement Obligation Disclosure [Abstract]
Schedule of Change in Asset Retirement Obligation	Activity related to asset retirement obligations was as follows: Year Ended December 31, 2020 2019 Balance, January 1 $ 158 $ 74 Additions 1 3 Accretion expense 12 10 Remeasurement/translation 7 — Changes in estimates, including cost and timing of cash flows (1) (8) Settlements/payments (15) (4) Transferred in with the acquisition of Cristal — 83 Other acquisition and divestiture related 4 — Balance, December 31 $ 166 $ 158 December 31, 2020 2019 Asset retirement obligations were classified as follows: Current portion included in “Accrued liabilities” $ 9 $ 16 Noncurrent portion included in “Asset retirement obligations” 157 142 Asset retirement obligations $ 166 $ 158

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) Attributable to Tronox Holdings plc and Other Equity Items (Tables)	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income (Loss) by Component	The tables below present changes in accumulated other comprehensive income (loss) by component for 2020, 2019 and 2018. Cumulative Translation Adjustment Pension Liability Adjustment Unrealized Gains (losses) on Derivatives Total Balance, January 1, 2018 $ (312) $ (90) $ (1) $ (403) Other comprehensive income (loss) (133) (5) 1 (137) Amounts reclassified from accumulated other comprehensive income (loss) — — — — Balance, December 31, 2018 (445) (95) — (540) Other comprehensive income (loss) 3 (11) 8 — Acquisition of noncontrolling interest (61) — — (61) Amounts reclassified from accumulated other comprehensive income (loss) — 2 (7) (5) Balance, December 31, 2019 $ (503) $ (104) $ 1 $ (606) Other comprehensive income (loss) 12 (20) (4) (12) Amounts reclassified from accumulated other comprehensive income (loss) — 4 4 8 Balance, December 31, 2020 $ (491) $ (120) $ 1 $ (610)

Share-based Compensation (Table

Share-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Share-based Compensation Expense	Share-based compensation expense consisted of the following: Year Ended December 31, 2020 2019 2018 Restricted shares and restricted share units $ 30 $ 32 $ 21 Options — — — Total share-based compensation expense (continuing operations) $ 30 $ 32 $ 21
Weighted-Average Assumptions Utilized to Value Grants	The following weighted-average assumptions were utilized to value the grants in 2020, 2019 and 2018: 2020 2019 2018 Dividend yield 2.13 % N/A N/A Expected historical volatility 58.30 % 67.20 % 80.40 % Risk free interest rate 1.42 % 2.50 % 2.32 % Expected life (in years) 3 3 3
Summary of Activity for Restricted Stock Share Units (RSUs)	The following table presents a summary of activity for RSUs for 2020: Number of Shares Weighted Average Grant Date Fair Value Outstanding, January 1, 2020 5,557,659 $ 15.19 Granted 3,982,816 8.89 Vested (2,033,591) 14.56 Forfeited (202,979) 11.75 Outstanding, December 31, 2020 7,303,905 $ 12.39 Expected to vest, December 31, 2020 6,805,041 $ 12.21
Summary of Activity for Options	The following table presents a summary of option activity for 2020: Number of Options Weighted Average Exercise Price Weighted Average Contractual Life (years) Intrinsic Value Outstanding, January 1, 2020 1,260,902 $ 21.54 3.18 $ — Exercised — — Forfeited — — Expired (59,011) 20.22 Outstanding and Exercisable, December 31, 2020 1,201,891 $ 21.60 2.19 $ —

Pension and Other Postretirem_2

Pension and Other Postretirement Healthcare Benefits (Tables)	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Schedule of Multiemployer Plans	The following table outlines the details of our participation in the CDC Plan for the year ended December 31, 2020. The CDC disclosures provided herein are based on the fund’s 2019 annual report, which is the most recently available public information. Based on the total plan assets and accumulated benefit obligation information in the plan’s annual report, the zone status was green as of December 31, 2019. A green zone status indicates that the plan was at least 80 percent funded. The “FIP/RP Status Pending/Implemented” column indicates whether a financial improvement plan (FIP) or a rehabilitation plan (RP) is either pending or has been implemented. As of December 31, 2020, we are not aware of any financial improvement or rehabilitation plan being implemented or pending. The last column lists the expiration date of the collective-bargaining agreement to which the plan is subject. Pension Protection Act Zone Status Tronox Contributions Pension Fund EIN/Pension Plan Number 2020 2019 FIP/RP Pending/ Implemented 2020 2019 Surcharge Imposed Expiration date of Collective- Bargaining Agreement PGB NA N/A Green No $ 5 $ 4 No 12/31/2024
Benefit Obligations and Plan Assets Associated With Benefit Plans	Benefit Obligations and Funded Status — The following provides a reconciliation of beginning and ending benefit obligations, beginning and ending plan assets, funded status, and balance sheet classification of our U.S. and international pension plans and other post-retirement benefit plans ("OPEB") as of and for the years ended December 31, 2020 and 2019. The benefit obligations and plan assets associated with our principal benefit plans are measured on December 31. Pensions Other Post Retirement Benefit Plans December 31 December 31 2020 2019 2020 2019 US International US International US International US International Change in benefit obligations: Benefit obligation, beginning of year $ 398 $ 232 $ 329 $ — $ 2 $ 13 $ — $ 7 Service cost 1 4 1 3 — — — — Interest cost 12 5 16 4 — 1 — 1 Net actuarial (gains) losses 28 20 36 6 — 3 — 2 Acquisition, net (1) — — 106 230 — — 2 3 Curtailments (2) — — — — (1) — — Settlements (7) (6) (59) (3) — — — — Plan amendments (2) — — — — — 9 — — Foreign currency rate changes — 6 — 2 — (2) — — Benefits paid (31) (9) (31) (10) — — — — Benefit obligation, end of year (3) 399 252 398 232 2 23 2 13 Change in plan assets: Fair value of plan assets, beginning of year 319 186 243 — — — — — Actual return on plan assets 41 15 51 6 — — — — Acquisition, net (1) — — 105 184 — — — — Employer contributions 22 3 10 7 — — — — Benefits paid (31) (9) (31) (10) — — — — Foreign currency rate changes — 6 — 2 — — — — Settlements (7) (6) (59) (3) — — — — Fair value of plan assets, end of year 344 195 319 186 — — — — Net underfunded status of plans $ (55) $ (57) $ (79) $ (46) $ (2) $ (23) $ (2) $ (13) Classification of amounts recognized in the Consolidated Balance Sheets: Other long-term assets $ — $ 14 $ 6 $ 20 $ — $ — $ — $ — Accrued liabilities — (5) — (6) — — — — Pension and postretirement healthcare benefits (55) (66) (85) (60) (2) (23) (2) (13) Total liabilities (55) (71) (85) (66) (2) (23) (2) (13) Accumulated other comprehensive (income) loss 98 12 96 4 — 12 — 1 Total $ 43 $ (45) $ 17 $ (42) $ (2) $ (11) $ (2) $ (12) ________________ (1) Represents the assets and benefit obligations assumed as part of the Cristal Transaction in 2019. Such plan assets and benefit obligations were remeasured as of the merger date and all subsequent activity through December 31, 2019 is presented within the respective captions above. (2) Relates to a plan amendment entered into during 2020 related to the Brazil Medical Plan. (3) Since the benefits under the U.S Qualified Plan and the U.K. DB Scheme are frozen, the projected benefit obligation and accumulated benefit obligation are the same.
Schedule of Accumulated and Projected Benefit Obligations	The following table provides information for pension plans where the accumulated benefit obligation exceeds the fair value of the plan assets: Pensions 2020 US International Projected benefit obligation (PBO) $ 399 $ 71 Accumulated benefit obligation (ABO) $ 399 $ 46 Fair value of plan assets $ 344 $ —
Expected Benefit Payments	Expected Benefit Payments — The following table shows the expected cash benefit payments for the next five years and in the aggregate for the years 2026 through 2030: 2021 2022 2023 2024 2025 2026-2030 Pensions - US $ 31 $ 31 $ 28 $ 27 $ 27 $ 119 Pensions - International $ 12 $ 9 $ 11 $ 11 $ 12 $ 63 Other Post Retirement Benefit Plans - US $ — $ — $ — $ — $ — $ 1 Other Post Retirement Benefit Plans - International $ — $ — $ 1 $ 1 $ 1 $ 8
Components of Net Periodic Cost Associated with the U.S. Defined Benefit Plans and The foreign Defined Plan	The table below presents the components of net periodic cost associated with the U.S. and foreign plans recognized in the Consolidated Statements of Operations for 2020, 2019, and 2018: Pensions Other Postretirement Benefit Plans Year Ended December 31, Year Ended December 31, 2020 2019 2018 2020 2019 2018 Net periodic cost: Service cost $ 5 $ 4 $ — $ — $ — $ — Interest cost (1) 17 21 13 1 1 1 Expected return on plan assets (1) (22) (22) (15) — — — Net amortization of actuarial loss (1) 4 2 3 — — — Settlement losses (gains) (1) — (1) — — — (3) Curtailment (gains) (1) (2) — — — — — Total net periodic cost - continuing operations $ 2 $ 4 $ 1 $ 1 $ 1 $ (2) ________________ (1) Recorded in Other income (expense), net in the Consolidated Statement of Operations.
Weighted Average Assumptions Used to Determine Net Periodic Cost and Benefit Obligations	The following weighted average assumptions were used to determine net periodic cost: Pension 2020 2019 2018 US International US International US Discount rate 3.39 % 1.98 % 4.34 % 2.50 % 3.71 % Expected return on plan assets 6.03 % 2.50 % 5.69 % 3.00 % 5.64 % OPEB 2020 2019 2018 US International US International International Discount rate 3.36 % 8.72 % 4.00 % 10.25 % 11.54 % Expected return on plan assets N/A N/A N/A N/A N/A The following weighted average assumptions were used in estimating the actuarial present value of benefit obligations: Pensions 2020 2019 2018 US International US International US Discount rate 2.60 % 1.45 % 3.39 % 1.98 % 4.40 % Rate of compensation increase 3.00 % 4.65 % 3.00 % 4.67 % N/A OPEB 2020 2019 2018 US International US International International Discount rate 2.59 % 9.51 % 3.36 % 9.91 % 11.38 % Rate of compensation increase N/A N/A N/A N/A N/A
Asset Categories and Associated Asset Allocations for the Company's Funded Retirement Plans	Tronox's U.S. and international pension plans’ weighted-average asset allocations at December 31, 2020 and 2019, and the target asset allocation ranges, by major asset category, are as follows: December 31, 2020 2019 US International US International Actual Target Actual Target Actual Target Actual Target Equity securities 43 % 42 % — % — % 50 % 49 % 7 % 4 % Debt securities 39 40 39 30 48 48 26 25 Real estate 1 — — — 1 — — — Other 17 18 61 70 1 3 67 71 Total 100 % 100 % 100 % 100 % 100 % 100 % 100 % 100 %
Fair values of pension investments	The fair values of pension investments as of December 31, 2020 are summarized below: Fair Value Measurement at December 31, 2020 Using: Quoted Prices Significant Other Significant Total Asset category: Equities securities: Global equity securities $ 83 (1) $ — $ — $ 83 Global comingled equity funds 66 (2) — — 66 Debt securities: US government bonds 70 (3) — — 70 Foreign government bonds 37 (3) — — 37 US corporate bonds — 62 (4) — 62 Foreign corporate bonds — 43 (4) — 43 Real Estate: Property/ real estate fund — 1 (5) — 1 Other: Insurance contracts — — 111 (7) 111 Cash & cash equivalents 66 (6) — — 66 Total at fair value $ 322 $ 106 $ 111 $ 539 ________________ (1) For global equity securities, this category is comprised of shares of common stock in both U.S. and international companies from a diverse set of industries and size. Common stock is valuated at the closing market price reported on a U.S. or international exchange where the security is actively traded. Equity securities are classified within level 1 of the fair value hierarchy. (2) Global commingled equity funds are comprised of managed funds that invest in common stock of both U.S. and international companies shares from a diverse set of industries and size. Common stock are valued at the closing market price reported on a U.S. or international exchange where the security is actively traded. These funds are classified within level 1 of the fair value hierarchy. (3) For US and foreign government bonds, this category includes U.S. treasuries, U.S. federal agency obligations and international government debt. The fair value of these investments are based on observable quoted prices on active exchanges, which are level 1 inputs. (4) For US corporate bonds and foreign corporate bonds, this category is comprised of corporate bonds of U.S. and foreign companies from a diverse set of industries and size. The fair values for the U.S. and foreign corporate bonds are determined using quoted prices of similar securities in active markets and observable data or broker or dealer quotations. The fair values for these investments are classified as level 2 within the valuation hierarchy. (5) For property / real estate funds, this category includes real estate properties, partnership equities and investments in operating companies. The fair value of the assets is determined using discounted cash flows by estimating an income stream for the property plus a reversion into a present value at a risk adjusted rate. Yield rates and growth assumptions utilized are derived from market transactions as well as other financial and industry data. The fair value of these investments are classified as level 2 in the valuation hierarchy. (6) Cash and cash equivalents include cash and short-interest bearing investments with maturities of three months or less. Investments are valued at cost plus accrued interest. Cash and cash equivalents are classified within level 1 of the valuation hierarchy. (7) For insurance contracts, the fair value is estimated as the cost of purchasing equivalent annuities on terms consistent with those currently available in the market. The contracts are with highly rated insurance companies and are classified within level 3 of the valuation hierarchy. The following table summarizes changes in fair value of the pension plan assets classified as level 3 for the year ended December 31, 2020: Insurance Contracts Balance, December 31, 2019 $ 104 Actual return on plan assets 9 Purchases, sales, settlements (5) Transfers in/out of Level 3 — Foreign currency translation 3 Balance, December 31, 2020 $ 111 The fair values of pension investments as of December 31, 2019 are summarized below: Fair Value Measurement at December 31, 2019, Using: Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Asset category: Equities securities: Global equity securities $ 68 (1) $ — $ — $ 68 Global comingled equity funds 104 (2) — — 104 Debt securities: US government bonds 69 (3) — (3) — 69 Foreign government bonds 34 (3) — — 34 US corporate bonds — 79 — 79 Foreign corporate bonds 16 (5) 6 — 22 Real Estate: Property/ real estate fund — 1 (6) — 1 Other: Insurance contracts — — 104 (9) 104 Alternative investments — 1 (7) — 1 Cash & cash equivalents 23 (8) — — 23 Total at fair value $ 314 $ 87 $ 104 $ 505 ________________ (1) For global equity securities, this category is comprised of shares of common stock in both U.S. and international companies from a diverse set of industries and size. Common stock is valuated at the closing market price reported on a U.S. or international exchange where the security is actively traded. Equity securities are classified within level 1 of the fair value hierarchy. (2) Global commingled equity funds are comprised of managed funds that invest in common stock of both U.S. and international companies shares from a diverse set of industries and size. Common stock are valued at the closing market price reported on a U.S. or international exchange where the security is actively traded. These funds are classified within level 1 of the fair value hierarchy. (3) For US and foreign government bonds, this category includes U.S. treasuries, U.S. federal agency obligations and international government debt. The fair value of these investments are based on observable quoted prices on active exchanges, which are level 1 inputs. (4) For US corporate bonds and a portion of foreign corporate bonds, this category is comprised of corporate bonds of U.S. and foreign companies from a diverse set of industries and size. The fair values for the U.S. and foreign corporate bonds are determined using quoted prices of similar securities in active markets and observable data or broker or dealer quotations. The fair values for these investments are classified as level 2 within the valuation hierarchy. (5) For certain foreign corporate bonds, the category is comprised of corporate bonds of foreign companies from a diverse set of industries and size. The fair value is based on observable quoted prices on active exchanges, which are level 1 inputs. (6) For property / real estate funds, this category includes real estate properties, partnership equities and investments in operating companies. The fair value of the assets is determined using discounted cash flows by estimating an income stream for the property plus a reversion into a present value at a risk adjusted rate. Yield rates and growth assumptions utilized are derived from market transactions as well as other financial and industry data. The fair value of these investments are classified as level 2 in the valuation hierarchy. (7) For alternative investments, this category is comprised of investments in alternative mutual funds whose holdings include liquid securities, cash and derivatives. Such funds focus on diversification and employ a variety of investing strategies including long/short equity, multi-strategy, and global macro. The fair value of these investments is determined by reference to the net asset value of the underlying holdings of the fund, which can be determined using observable data (e.g. indices, yield curves, quoted prices of similar securities), and is classified within level 2 of the valuation hierarchy. (8) Cash and cash equivalents include cash and short-interest bearing investments with maturities of three months or less. Investments are valued at cost plus accrued interest. Cash and cash equivalents are classified within level 1 of the valuation hierarchy. (9) For insurance contracts, the fair value is estimated as the cost of purchasing equivalent annuities on terms consistent with those currently available in the market. The contracts are with highly rated insurance companies and are classified within level 3 of the valuation hierarchy. The following table summarizes changes in fair value of the pension plan assets classified as level 3 for the year ended December 31, 2019: Insurance Contracts Balance, December 31, 2018 $ — Actual return on plan assets 2 Acquisitions 101 Transfers in/out of Level 3 — Foreign currency translation 1 Balance, December 31, 2019 $ 104

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Net Sales to External Customers, by Geographic Region, Based on Country of Production	Net sales to external customers based on country of production, were as follows: Year Ended December 31, 2020 2019 2018 U.S. operations $ 653 $ 676 $ 685 International operations: United Kingdom 301 218 — Australia 637 674 444 South Africa 330 370 444 Other - international 837 704 246 Total net sales $ 2,758 $ 2,642 $ 1,819
Property, Plant and Equipment, Net and Mineral Leaseholds, Net, by Geographic Region	Property, plant and equipment, net, mineral leaseholds, net, and lease right of use assets, net by geographic region, were as follows: December 31, 2020 2019 U.S. operations $ 261 $ 255 International operations: United Kingdom 101 93 Saudi Arabia 262 215 South Africa 768 799 Australia 995 1,109 Other - international 256 244 Total $ 2,643 $ 2,715

Quarterly Results of Operatio_2

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Results of Operations	Unaudited quarterly results for the year ended December 31, 2020: 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Net sales $ 722 $ 578 $ 675 $ 783 Cost of goods sold 547 449 536 605 Gross profit 175 129 139 178 Net income (loss) from continuing operations 40 (4) 902 57 Net income from discontinued operations, net of tax — — — — Net income (loss) 40 (4) 902 57 Net income attributable to noncontrolling interest 8 — 6 12 Net income (loss) attributable to Tronox Holdings plc $ 32 $ (4) $ 896 $ 45 Net income (loss) per share, basic $ 0.23 $ (0.03) $ 6.24 $ 0.31 Net income (loss) per share, diluted $ 0.22 $ (0.03) $ 6.18 $ 0.31 Unaudited quarterly results for the year ended December 31, 2019: 1st Quarter 2nd Quarter (1) 3rd Quarter (1) 4th Quarter Net sales $ 390 $ 791 $ 768 $ 693 Cost of goods sold 307 672 635 545 Contract loss — 19 — — Gross profit 83 100 133 148 Net (loss) income from continuing operations (30) (55) (12) (5) Net income (loss) from discontinued operations, net of tax — (1) 6 — Net (loss) income (30) (56) (6) (5) Net income attributable to noncontrolling interest 4 6 7 (5) Net (loss) income attributable to Tronox Holdings plc (1) $ (34) $ (62) $ (13) $ — Loss from continuing operations per share, basic and diluted $ (0.27) $ (0.41) $ (0.13) $ — Income from discontinued operations per share, basic and diluted $ — $ — $ 0.04 $ — _____________________ (1) During the third quarter of 2019, we recorded an out-of-period adjustment of $7 million to reduce the tax impact of a transaction related to the Cristal acquisition within income from discontinued operations that should have been recorded in the second quarter of 2019. After evaluating the quantitative and qualitative aspects of the adjustments, we concluded the effect of this adjustment, individually and in the aggregate, was not material to our previously issued interim consolidated financial statements and has no effect to our annual 2019 consolidated financial statements.

The Company (Details)

The Company (Details) - facility	Apr. 10, 2019	Apr. 09, 2019
Minimum
The Company [Abstract]
Number of titanium dioxide pigment facilities in which entity operates		3
Maximum
The Company [Abstract]
Number of titanium dioxide pigment facilities in which entity operates	9

Significant Accounting Polici_4

Significant Accounting Policies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Research and development expenses	$ 12	$ 17	$ 11
Cash and Cash Equivalents [Line Items]
Restricted cash	$ 29
Minimum
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible asset, useful life	3 years
Lessee, Lease, Description [Line Items]
Lease term	1 year
Maximum
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible asset, useful life	20 years
Lessee, Lease, Description [Line Items]
Lease term	25 years
Land improvements | Minimum
Long Lived Assets [Abstract]
Estimated useful life	10 years
Land improvements | Maximum
Long Lived Assets [Abstract]
Estimated useful life	20 years
Buildings | Minimum
Long Lived Assets [Abstract]
Estimated useful life	10 years
Buildings | Maximum
Long Lived Assets [Abstract]
Estimated useful life	40 years
Machinery and equipment | Minimum
Long Lived Assets [Abstract]
Estimated useful life	3 years
Machinery and equipment | Maximum
Long Lived Assets [Abstract]
Estimated useful life	25 years
Furniture and fixtures
Long Lived Assets [Abstract]
Estimated useful life	10 years
Europe
Cash and Cash Equivalents [Line Items]
Restricted cash	$ 18
Australia | Performance Bonds
Cash and Cash Equivalents [Line Items]
Restricted cash	10	$ 9
Saudi Arabia
Cash and Cash Equivalents [Line Items]
Restricted cash	$ 1

Acquisitions and Related Dive_3

Acquisitions and Related Divestitures - Narrative (Details) $ / shares in Units, ton in Thousands, € in Millions, $ in Millions

Jan. 19, 2021USD ($)

May 01, 2019USD ($)

Apr. 26, 2019EUR (€)

Apr. 10, 2019USD ($)$ / sharesshares

May 31, 2020USD ($)ton

Jun. 30, 2020USD ($)

Jun. 30, 2020EUR (€)

Mar. 31, 2020USD ($)

Dec. 31, 2019USD ($)shares

Sep. 30, 2019USD ($)

Jun. 30, 2019USD ($)

Mar. 31, 2019USD ($)

Dec. 31, 2020USD ($)shares

Dec. 31, 2019USD ($)shares

Dec. 31, 2018USD ($)

Jun. 30, 2021USD ($)

Jun. 30, 2021EUR (€)

Business Acquisition [Line Items]

Cash consideration

$ 0

$ 1,675

$ 0

Common stock, shares outstanding (in shares) | shares

141,900,459

143,557,479

141,900,459

Supply commitment, initial term

2 years

Contract loss

$ 0

$ 0

$ 19

$ 0

$ 0

$ 19

0

Pre-tax charges related to step up to fair value of inventories acquired

$ 0

98

0

Pro forma pre-tax charges related to step up to fair value of inventories acquired

98

Pro forma transaction costs

$ 120

INEOS | Transition Services Agreement | Affiliated Entity

Business Acquisition [Line Items]

Agreement term

2 years

Maximum

Business Acquisition [Line Items]

Supply commitment, extendable term (up to)

3 years

Discontinued Operations, Disposed of by Sale | Cristal, North America TiO2 Business

Business Acquisition [Line Items]

Proceeds from divestiture of business, net of transaction costs

$ 701

Proceeds from divestiture of business (in euros)

$ 701

Discontinued Operations, Disposed of by Sale | 8120 Paper Laminate Grade

Business Acquisition [Line Items]

Proceeds from divestiture of business (in euros)

$ 3.9

€ 3.5

Disposal Group, Disposed of by Sale, Not Discontinued Operations | 8120 Paper Laminate Grade

Business Acquisition [Line Items]

Proceeds from divestiture of business (in euros) | €

€ 1

Contract loss

19

19

Cristal International Holdings B.V.

Business Acquisition [Line Items]

Common stock, shares outstanding (in shares) | shares

37,580,000

Ownership percentage

26.00%

National Industrialization Company (Tasnee) | National Titanium Dioxide Company Ltd.

Business Acquisition [Line Items]

Ownership percentage

79.00%

Venator Materials PLC

Business Acquisition [Line Items]

Divestiture of businesses, cash consideration (in euros) | €

€ 8

Scenario, Forecast | Subsequent Event | Disposal Group, Disposed of by Sale, Not Discontinued Operations | 8120 Paper Laminate Grade

Business Acquisition [Line Items]

Amount of consideration received in cash

$ 4.3

€ 3.5

Tizir Titanium And Iron

Business Acquisition [Line Items]

Cash consideration

$ 300

Percentage of annual acquisition costs

3.00%

Payments into escrow

$ 18

Tizir Titanium And Iron | High-Grade Titanium Slag

Business Acquisition [Line Items]

Number of annual tons capacity to upgrade mineral to product | ton

230

Tizir Titanium And Iron | High-Purity Pig Iron

Business Acquisition [Line Items]

Number of annual tons capacity to upgrade mineral to product | ton

90

Tizir Titanium And Iron | Minimum

Business Acquisition [Line Items]

Termination fee

$ 18

Tizir Titanium And Iron | Subsequent Event

Business Acquisition [Line Items]

Payments into escrow

$ 18

Tizir Titanium And Iron | Subsequent Event | Minimum

Business Acquisition [Line Items]

Termination fee

$ 18

Cristal, TiO2 Business

Business Acquisition [Line Items]

Cash consideration

$ 1,675

Number of shares issued in acquisition | shares

37,580,000

Closing share price (in dollars per share) | $ / shares

$ 14

Total consideration transferred

$ 2,201

Land and improvements assumed

92

Machinery and equipment assumed

518

Buildings assumed

90

Construction in progress assumed

$ 59

Pre-tax charges related to step up to fair value of inventories acquired

$ 98

Cristal's Titanium Dioxide Business

Business Acquisition [Line Items]

Adjustment to environmental liabilities

$ 8

Adjustment to property, plant, and equipment

13

Adjustment to noncontrolling equity Interests

3

Measurement period adjustment, deferred taxes

6

Adjustment to liabilities held for sale

5

Adjustment to inventory

$ 4

Adjustments related to previous period

$ 1

Acquisitions and Related Dive_4

Acquisitions and Related Divestitures - Purchase Price Allocation (Details) - USD ($) $ / shares in Units, $ in Millions	Apr. 10, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Cash consideration paid		$ 0	$ 1,675	$ 0
Cristal, TiO2 Business
Business Acquisition [Line Items]
Tronox Holdings plc shares issued (in shares)	37,580,000
Tronox Holdings plc closing price per share on April 10th, 2019 (in dollars per share)	$ 14
Total fair value of Tronox Holdings plc shares issued at acquisition date	$ 526
Cash consideration paid	1,675
Total Purchase Price	$ 2,201

Acquisitions and Related Dive_5

Acquisitions and Related Divestitures - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - Cristal, TiO2 Business - USD ($) $ in Millions	Dec. 31, 2019	Apr. 10, 2019
Fair Value of Assets Acquired
Accounts receivable		$ 251
Inventory		689
Deferred taxes	$ 49	51
Prepaid and other assets		81
Property, plant and equipment		759
Mineral leaseholds		95
Intangible assets		64
Lease right of use assets		40
Other long-term assets		43
Assets held for sale		850
Total assets acquired		2,923
Less: Liabilities Assumed
Accounts payable		102
Accrued liabilities		137
Short-term lease liabilities		13
Deferred tax liabilities		2
Pension and postretirement healthcare benefits		76
Environmental liabilities		72
Asset retirement obligations		75
Long-term debt		22
Long-term lease liabilities		24
Other long-term liabilities		20
Liabilities held for sale		131
Total liabilities assumed		674
Less noncontrolling interest		48
Purchase price		$ 2,201

Acquisitions and Related Dive_6

Acquisitions and Related Divestitures - Pro Forma Information (Details) - Cristal, TiO2 Business - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Net Sales	$ 3,008	$ 3,339
Net income from continuing operations attributable to Tronox Holdings plc	$ 18	$ 32

Restructuring Initiatives - Nar

Restructuring Initiatives - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Restructuring and Related Activities [Abstract]
Restructuring expense	$ 3	$ 22

Restructuring Initiatives - Sch

Restructuring Initiatives - Schedule of Liability Balance for Restructuring (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 10	$ 0
Charges	3	22
Cash payments	(11)	(12)
Restructuring reserve, ending balance	$ 2	$ 10

Revenue - Narrative (Details)

Revenue - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2020USD ($)segment	Dec. 31, 2020USD ($)discontinuedOperation	Dec. 31, 2019USD ($)
Disaggregation of Revenue [Line Items]
Number of operating segments		1	1
Number of reportable segments | segment		1
Maximum
Disaggregation of Revenue [Line Items]
Duration of contract	1 year
Contract liability | $	$ 4	$ 4	$ 4	$ 1

Revenue - Disaggregation of Rev

Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 783	$ 675	$ 578	$ 722	$ 693	$ 768	$ 791	$ 390	$ 2,758	$ 2,642	$ 1,819
TiO2
Disaggregation of Revenue [Line Items]
Net sales									2,176	2,049	1,230
Zircon
Disaggregation of Revenue [Line Items]
Net sales									283	290	293
Feedstock and other products
Disaggregation of Revenue [Line Items]
Net sales									299	303	259
Electrolytic
Disaggregation of Revenue [Line Items]
Net sales									0	0	37
North America
Disaggregation of Revenue [Line Items]
Net sales									794	696	649
South and Central America
Disaggregation of Revenue [Line Items]
Net sales									315	164	72
Europe, Middle-East and Africa
Disaggregation of Revenue [Line Items]
Net sales									879	954	541
Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales									$ 770	$ 828	$ 557

Discontinued Operations and O_3

Discontinued Operations and Other Disposition - Narrative (Details) $ in Millions	May 01, 2019USD ($)	Dec. 27, 2018USD ($)	Sep. 01, 2018USD ($)	Dec. 31, 2020USD ($)discontinuedOperation	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)discontinuedOperation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of discontinued operations | discontinuedOperation				0		0
Impairment loss				$ 0	$ 0	$ 31
Discontinued Operations, Disposed of by Sale | Cristal, North America TiO2 Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses	$ 701
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Henderson Electrolytic Operations | Tronox LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses			$ 1.3
Secured promissory note			$ 4.7
Proceeds from full settlement of secured promissory note		$ 4.7

Discontinued Operations and O_4

Discontinued Operations and Other Disposition - Summary of Operations of Discontinued Operation (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of tax	$ 0	$ 0	$ 0	$ 0	$ 0	$ 6	$ (1)	$ 0	$ 0	$ 5	$ 0
Cristal, North America TiO2 Business | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales										41
Cost of goods sold										29
Gross profit										12
Selling, general and administrative expense and other expenses										5
Income before income taxes										7
Income tax provision										2
Income from discontinued operations, net of tax										$ 5

Other Income (Expense), Net (De

Other Income (Expense), Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Income and Expenses [Abstract]
Net realized and unrealized foreign currency gains (losses)	$ 4	$ 5	$ 29
Pension and postretirement benefit interest cost, expected return on assets and amortization of actuarial losses	1	(1)	(2)
Pension and postretirement benefit settlement gains	2	1	3
Insurance proceeds	11	0	0
AMIC technical service support fee (Note 24)	5	0	0
Other, net	3	(2)	3
Total	$ 26	$ 3	$ 33

Income Taxes, Income (Loss) bef

Income Taxes, Income (Loss) before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract]
Domestic	$ (12)	$ 56	$ (122)
International	126	(144)	165
Income (loss) from continuing operations before income taxes	$ 114	$ (88)	$ 43

Income Taxes, Income Tax (Provi

Income Taxes, Income Tax (Provision) Benefit (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Domestic [Abstract]
Current	$ (1)	$ 0	$ (1)
Deferred	(10)	11	3
International [Abstract]
Current	(17)	(23)	(33)
Deferred	909	(2)	18
Income tax (provision) benefit	$ 881	$ (14)	$ (13)

Income Taxes, Effective Income

Income Taxes, Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory tax rate	19.00%	19.00%	19.00%
Increases (decreases) resulting from:
Tax rate differences	10.00%	5.00%	24.00%
Disallowable expenditures	17.00%	(29.00%)	88.00%
Valuation allowances	(849.00%)	(44.00%)	(474.00%)
Corporate Reorganization	(97.00%)	0.00%	0.00%
Tax rate changes	(9.00%)	17.00%	41.00%
State and local taxes	5.00%	(7.00%)	8.00%
Prior year accruals	131.00%	24.00%	368.00%
Branch taxation	0.00%	(1.00%)	(37.00%)
Deferred gross margin	0.00%	(4.00%)	(9.00%)
Other, net	0.00%	4.00%	2.00%
Effective tax rate	(773.00%)	(16.00%)	30.00%

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions	Nov. 26, 2018	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2014	Apr. 10, 2019
Income Taxes [Abstract]
Federal statutory income tax rate, percent			19.00%	19.00%	19.00%
Settlement amount paid		$ 11
Net operating loss and other carryforwards			$ 1,788	$ 1,899
Property, plant and equipment, net			153	115
Reserves for environmental remediation and restoration			46	45
Property, plant and equipment, net			(226)	(242)
Inventories, net			(2)	(6)
Valuation allowance associated with deferred tax assets			(1,826)	(2,791)
Valuation allowance, increase (decrease)			(965)	$ 172	$ (205)
Valuation allowance, deferred tax asset, reversal amount			909
Operating loss carryforwards, valuation allowance			1,044
Undistributed earnings from foreign subsidiaries subject to withholding tax if distributed			$ 266
Positive Outcome of Litigation | Settled Litigation | Anadarko Litigation
Income Taxes [Abstract]
Settlement amount paid						$ 5,200
Additional deferred tax assets						$ 2,000
United Kingdom
Income Taxes [Abstract]
Federal statutory income tax rate, percent			19.00%	19.00%	19.00%
Valuation allowance, increase (decrease)			$ (1)	$ (2)	$ 8
Netherlands
Income Taxes [Abstract]
Benefit due to reversal of valuation allowance					48
Australia
Income Taxes [Abstract]
Valuation allowance, increase (decrease)			(17)	89	$ (144)
Brazil | Foreign Currency Exchange Rates Changes
Income Taxes [Abstract]
Valuation allowance, deferred tax asset, reversal amount			8
Saudi Arabia | Foreign Currency Exchange Rates Changes
Income Taxes [Abstract]
Valuation allowance, deferred tax asset, reversal amount			2
Domestic Tax Authority | Australia
Income Taxes [Abstract]
Settlement tax provision	$ 11
Loss in deferred tax assets related to net operating losses	$ (154)		(79)
Cristal, TiO2 Business
Income Taxes [Abstract]
Deferred taxes				$ 49			$ 51
Net operating loss and other carryforwards			186
Property, plant and equipment, net			49
Reserves for environmental remediation and restoration			23
Property, plant and equipment, net			(49)
Inventories, net			(30)
Valuation allowance associated with deferred tax assets			(123)
Valuation allowance, deferred tax asset, reversal amount			10
Reduction of acquired U.S. loss carryforward			$ 69

Income Taxes, Net Deferred Tax

Income Taxes, Net Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Net operating loss and other carryforwards	$ 1,788	$ 1,899
Property, plant and equipment, net	153	115
Reserves for environmental remediation and restoration	46	45
Obligations for pension and other employee benefits	57	58
Investments	3	28
Grantor trusts	637	615
Inventories, net	8	10
Interest	232	243
Lease liabilities	21	27
Other accrued liabilities	6	10
Foreign exchange	1	0
Other	8	11
Total deferred tax assets	2,960	3,061
Valuation allowance associated with deferred tax assets	(1,826)	(2,791)
Net deferred tax assets	1,134	270
Deferred tax liabilities:
Inventories, net	(2)	(6)
Property, plant and equipment, net	(226)	(242)
Intangible assets, net	(30)	(45)
Lease assets	(22)	(28)
Foreign exchange	0	(9)
Other	(10)	(14)
Total deferred tax liabilities	(290)	(344)
Net deferred tax liability	844
Net deferred tax liability		(74)
Balance sheet classifications:
Deferred tax assets — long-term	1,020	110
Deferred tax liabilities — long-term	(176)	(184)
Net deferred tax liability	$ 844
Net deferred tax liability		$ (74)

Income Taxes, Changes in Valuat

Income Taxes, Changes in Valuation Allowance by Jurisdiction (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in valuation allowance by jurisdiction [Abstract]
Valuation allowance, increase (decrease)	$ (965)	$ 172	$ (205)
United Kingdom
Changes in valuation allowance by jurisdiction [Abstract]
Valuation allowance, increase (decrease)	(1)	(2)	8
United States
Changes in valuation allowance by jurisdiction [Abstract]
Valuation allowance, increase (decrease)	(944)	54	(12)
Australia
Changes in valuation allowance by jurisdiction [Abstract]
Valuation allowance, increase (decrease)	(17)	89	(144)
The Netherlands
Changes in valuation allowance by jurisdiction [Abstract]
Valuation allowance, increase (decrease)	2	0	(57)
Saudi Arabia
Changes in valuation allowance by jurisdiction [Abstract]
Valuation allowance, increase (decrease)	11	0	0
Brazil
Changes in valuation allowance by jurisdiction [Abstract]
Valuation allowance, increase (decrease)	(14)	14	0
Switzerland
Changes in valuation allowance by jurisdiction [Abstract]
Valuation allowance, increase (decrease)	0	15	0
Belgium
Changes in valuation allowance by jurisdiction [Abstract]
Valuation allowance, increase (decrease)	$ (2)	$ 2	$ 0

Income Taxes, Expiration of Tax

Income Taxes, Expiration of Tax Loss Carryforwards (Details) $ in Millions	Dec. 31, 2020USD ($)
Summary of expiration of tax loss carryforwards [Abstract]
2021	$ (11)
2022	(139)
2023	(144)
2024	(31)
2025	(67)
2026 - 2039	(8,286)
Unlimited	(1,044)
Total Tax Loss Carryforwards	(9,722)
Other
Summary of expiration of tax loss carryforwards [Abstract]
2021	0
2022	0
2023	0
2024	0
2025	0
2026 - 2039	0
Unlimited	(7)
Total Tax Loss Carryforwards	(7)
Domestic Tax Authority | United Kingdom
Summary of expiration of tax loss carryforwards [Abstract]
2021	0
2022	0
2023	0
2024	0
2025	0
2026 - 2039	0
Unlimited	(62)
Total Tax Loss Carryforwards	(62)
Foreign Tax Authority | Australia
Summary of expiration of tax loss carryforwards [Abstract]
2021	0
2022	0
2023	0
2024	0
2025	0
2026 - 2039	0
Unlimited	(358)
Total Tax Loss Carryforwards	(358)
Foreign Tax Authority | The Netherlands
Summary of expiration of tax loss carryforwards [Abstract]
2021	(8)
2022	(35)
2023	(39)
2024	(19)
2025	(26)
2026 - 2039	(131)
Unlimited	0
Total Tax Loss Carryforwards	(258)
Foreign Tax Authority | France
Summary of expiration of tax loss carryforwards [Abstract]
2021	0
2022	0
2023	0
2024	0
2025	0
2026 - 2039	0
Unlimited	(242)
Total Tax Loss Carryforwards	(242)
Foreign Tax Authority | Saudi Arabia
Summary of expiration of tax loss carryforwards [Abstract]
2021	0
2022	0
2023	0
2024	0
2025	0
2026 - 2039	0
Unlimited	(37)
Total Tax Loss Carryforwards	(37)
Foreign Tax Authority | Switzerland
Summary of expiration of tax loss carryforwards [Abstract]
2021	0
2022	(101)
2023	(80)
2024	0
2025	0
2026 - 2039	0
Unlimited	0
Total Tax Loss Carryforwards	(181)
Foreign Tax Authority | U.S. Federal
Summary of expiration of tax loss carryforwards [Abstract]
2021	0
2022	0
2023	0
2024	0
2025	0
2026 - 2039	(4,082)
Unlimited	(320)
Total Tax Loss Carryforwards	(4,402)
State and Local Jurisdiction | U.S. Federal
Summary of expiration of tax loss carryforwards [Abstract]
2021	(3)
2022	(3)
2023	(25)
2024	(12)
2025	(41)
2026 - 2039	(4,073)
Unlimited	(18)
Total Tax Loss Carryforwards	$ (4,175)

Income (Loss) Per Share - Compu

Income (Loss) Per Share - Computation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Numerator – Basic and Diluted:
Net (loss) income from continuing operations	$ 57	$ 902	$ (4)	$ 40	$ (5)	$ (12)	$ (55)	$ (30)	$ 995	$ (102)	$ 30
Less: Net income from continuing operations attributable to noncontrolling interest									26	12	37
Undistributed net income (loss) from continuing operations attributable to Tronox Holdings plc									969	(114)	(7)
Net income from discontinued operations available to ordinary shares									0	5	0
Net income (loss) available to ordinary shares									$ 969	$ (109)	$ (7)
Denominator – Basic and Diluted:
Weighted-average ordinary shares (thousands) (in shares)									143,355	139,859	122,881
Weighted average shares outstanding, diluted (in thousands) (in shares)									144,906	139,859	122,881
Net income (loss) per Ordinary Share:
Net income (loss) per share, basic (in dollars per share)	$ 0.31	$ 6.24	$ (0.03)	$ 0.23					$ 6.76	$ (0.81)	$ (0.06)
Basic net (loss) income from discontinued operations per ordinary share (in dollars per share)									0	0.03	0
Net income (loss) per share, basic (in dollars per share)									6.76	(0.78)	(0.06)
Diluted net loss from continuing operations per ordinary share (in dollars per share)	$ 0.31	$ 6.18	$ (0.03)	$ 0.22					6.69	(0.81)	(0.06)
Diluted net (loss) income from discontinued operations per ordinary share (in dollars per share)									0	0.03	0
Net income (loss) per share, diluted (in dollars per share)									$ 6.69	$ (0.78)	$ (0.06)

Income (Loss) Per Share - Com_2

Income (Loss) Per Share - Computation of Anti-Dilutive Shares (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Employee Stock Option
Earnings Per Share, Diluted, Other Disclosures [Abstract]
Shares (in shares)	1,201,891	1,260,902	1,319,743
Restricted Stock Units (RSUs)
Earnings Per Share, Diluted, Other Disclosures [Abstract]
Shares (in shares)	1,054,994	5,557,659	5,336,433

Inventories, net (Details)

Inventories, net (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Inventory, Net [Abstract]
Raw materials	$ 170	$ 205
Work-in-process	103	129
Finished goods, net	668	573
Materials and supplies, net	196	224
Inventories, net - current	1,137	1,131
Inventory obsolescence reserves	41	39
Reserves for lower of cost and net realizable value	$ 29	$ 25

Property, Plant and Equipment_2

Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment, Net, by Type [Abstract]
Property, plant and equipment, gross	$ 3,032	$ 2,769
Less: accumulated depreciation	(1,273)	(1,007)
Property, plant and equipment, net	1,759	1,762
Depreciation expense related to property plant and equipment [Abstract]
Depreciation expense	238	194	$ 134
Cost of goods sold
Depreciation expense related to property plant and equipment [Abstract]
Depreciation expense	233	189	131
Selling, general and administrative expenses
Depreciation expense related to property plant and equipment [Abstract]
Depreciation expense	5	5	$ 3
Land and land improvements
Property, Plant and Equipment, Net, by Type [Abstract]
Property, plant and equipment, gross	189	191
Buildings
Property, Plant and Equipment, Net, by Type [Abstract]
Property, plant and equipment, gross	368	340
Machinery and equipment
Property, Plant and Equipment, Net, by Type [Abstract]
Property, plant and equipment, gross	2,197	2,028
Construction-in-progress
Property, Plant and Equipment, Net, by Type [Abstract]
Property, plant and equipment, gross	192	156
Other
Property, Plant and Equipment, Net, by Type [Abstract]
Property, plant and equipment, gross	$ 86	$ 54

Mineral Leaseholds, net (Detail

Mineral Leaseholds, net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Minerals leaseholds, net of accumulated depletion [Abstract]
Mineral leaseholds	$ 1,333	$ 1,352
Less accumulated depletion	(530)	(500)
Mineral leaseholds, net	803	852
Depletion expense related to mineral leaseholds	$ 33	$ 56	$ 35

Intangible Assets, net (Details

Intangible Assets, net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Intangible assets, net of accumulated amortization [Abstract]
Gross Cost	$ 457	$ 432
Accumulated Amortization	(256)	(224)
Net Carrying Amount	201	208
Capitalized costs	195	198	$ 117
Amortization expense related to intangible assets [Abstract]
Amortization expense	33	30	26
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2021	35
2022	36
2023	33
2024	32
2025	26
Thereafter	39
Cost of goods sold
Amortization expense related to intangible assets [Abstract]
Amortization expense	2	2	1
Selling, general and administrative expenses
Amortization expense related to intangible assets [Abstract]
Amortization expense	31	28	$ 25
Customer relationships
Intangible assets, net of accumulated amortization [Abstract]
Gross Cost	291	291
Accumulated Amortization	(193)	(173)
Net Carrying Amount	98	118
TiO2 technology
Intangible assets, net of accumulated amortization [Abstract]
Gross Cost	93	92
Accumulated Amortization	(24)	(17)
Net Carrying Amount	69	75
Internal-use software and other
Intangible assets, net of accumulated amortization [Abstract]
Gross Cost	73	49
Accumulated Amortization	(39)	(34)
Net Carrying Amount	34	$ 15
Capitalized costs	$ 19

Balance Sheet and Cash Flows _3

Balance Sheet and Cash Flows Supplemental Information - Accrued Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accrued Liabilities, Current [Abstract]
Employee-related costs and benefits	$ 133	$ 103
Related party payables	7	7
Interest	21	16
Sales rebates	43	39
Restructuring	2	10	$ 0
Taxes other than income taxes	16	6
Asset retirement obligations	9	16
Interest rate swaps	57	22
Professional fees and other	62	60
Liabilities held for sale	0	4
Accrued liabilities	$ 350	$ 283

Balance Sheet and Cash Flows _4

Balance Sheet and Cash Flows Supplemental Information - Additional Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Supplemental non cash information:
Capital expenditures acquired but not yet paid	$ 37	$ 23
Cristal, TiO2 Business
Supplemental non cash information:
Investing activities- shares issued in the Cristal Transaction	0	526
Financing activities - debt assumed	0	22
MGT Acquisition
Supplemental non cash information:
Investing activities - Acquisition of MGT assets	36	0
Financing activities - debt assumed	$ 36	$ 0

Debt - Long-Term Debt, Net of U

Debt - Long-Term Debt, Net of Unamortized Discount and Debt Issuance Costs (Details) ¥ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2020CNY (¥)	Dec. 31, 2020AUD ($)	May 01, 2020USD ($)	Apr. 10, 2019AUD ($)	Dec. 31, 2018USD ($)	Apr. 06, 2018USD ($)	Sep. 22, 2017USD ($)
Long-term debt, net of an unamortized discount and debt issuance costs [Abstract]
Long-term debt, gross	$ 3,365,000,000
Finance leases	15,000,000	$ 15,000,000
Total borrowings	3,356,000,000	3,060,000,000
Long-term debt due within one year	(58,000,000)	(38,000,000)
Debt issuance costs	(35,000,000)	(34,000,000)
Long-term debt, net	3,263,000,000	2,988,000,000
Term Loan Facility
Long-term debt, net of an unamortized discount and debt issuance costs [Abstract]
Original Principal	2,150,000,000
Long-term debt, gross	$ 1,607,000,000	$ 1,805,000,000
Average effective interest rate	4.60%	5.60%
Senior Notes due 2025
Long-term debt, net of an unamortized discount and debt issuance costs [Abstract]
Original Principal	$ 450,000,000								$ 450,000,000
Annual Interest Rate	5.75%		5.75%	5.75%					5.75%
Long-term debt, gross	$ 450,000,000	$ 450,000,000
Senior Notes due 2026
Long-term debt, net of an unamortized discount and debt issuance costs [Abstract]
Original Principal	$ 615,000,000							$ 615,000,000
Annual Interest Rate	6.50%		6.50%	6.50%				6.50%
Long-term debt, gross	$ 615,000,000	615,000,000
Senior Notes | Senior Notes due 2026
Long-term debt, net of an unamortized discount and debt issuance costs [Abstract]
Debt issuance costs							$ (10,000,000)
Senior Notes | 6.5% Senior Secured Notes due 2025
Long-term debt, net of an unamortized discount and debt issuance costs [Abstract]
Original Principal	$ 500,000,000				$ 500,000,000
Annual Interest Rate	6.50%		6.50%	6.50%	6.50%
Long-term debt, gross	$ 500,000,000	0
Notes Payable to Banks | Standard Bank Term Loan Facility
Long-term debt, net of an unamortized discount and debt issuance costs [Abstract]
Original Principal	222,000,000
Long-term debt, gross	$ 115,000,000	$ 158,000,000
Average effective interest rate	7.80%	9.70%
Loans Payable | Tikon Loan
Long-term debt, net of an unamortized discount and debt issuance costs [Abstract]
Long-term debt, gross	$ 17,000,000	$ 16,000,000	¥ 111
Loans Payable | Australian Government Loan
Long-term debt, net of an unamortized discount and debt issuance costs [Abstract]
Original Principal	5,000,000					$ 6,000,000
Long-term debt, gross	1,000,000	1,000,000		$ 1,500,000
Loans Payable | MGT Loan
Long-term debt, net of an unamortized discount and debt issuance costs [Abstract]
Long-term debt, gross	$ 36,000,000	$ 0

Debt - Scheduled Maturities of

Debt - Scheduled Maturities of Long-term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Scheduled maturities of long-term debt [Abstract]
2021	$ 58	$ 38
2022	44
2023	44
2024	1,631
2025	959
Thereafter	629
Total	3,365
Remaining accretion associated with the Term Loan Facility and Australian Government Loan	(9)	(12)
Total borrowings	$ 3,356	$ 3,060

Debt - Facilities and Cristal D

Debt - Facilities and Cristal Debt Acquired (Details) ¥ in Millions

Dec. 31, 2019USD ($)

Oct. 16, 2019USD ($)

May 01, 2019USD ($)

Apr. 10, 2019USD ($)

Mar. 31, 2019USD ($)

Mar. 25, 2019ZAR (R)

Mar. 22, 2019USD ($)

Sep. 22, 2017USD ($)

Feb. 28, 2021USD ($)

Feb. 28, 2021CNY (¥)

Jan. 31, 2021USD ($)

Jan. 31, 2021ZAR (R)

Dec. 31, 2019USD ($)

Oct. 31, 2019SAR (ر.س)

Mar. 31, 2019USD ($)

Dec. 31, 2020USD ($)

Dec. 31, 2019USD ($)

Dec. 31, 2018USD ($)

Dec. 31, 2020ZAR (R)

Dec. 31, 2020CNY (¥)

Dec. 31, 2020AUD ($)

Dec. 17, 2020USD ($)

Mar. 31, 2020USD ($)

Mar. 31, 2020SAR (ر.س)

Oct. 16, 2019SAR (ر.س)

Apr. 10, 2019AUD ($)

Line of Credit Facility [Abstract]

Debt discount

$ 12,000,000

$ 12,000,000

$ 9,000,000

$ 12,000,000

Loss on extinguishment of debt

2,000,000

3,000,000

$ 30,000,000

Debt outstanding

3,365,000,000

Debt outstanding, short-term

0

0

0

0

Discontinued Operations, Disposed of by Sale | Cristal, North America TiO2 Business

Line of Credit Facility [Abstract]

Proceeds from divestiture of business, net of transaction costs

$ 701,000,000

Term Loan Facility

Line of Credit Facility [Abstract]

Original Principal

2,150,000,000

Net leverage ratio benchmark

2.75

Debt prepayment

$ 100,000,000

$ 95,000,000

100,000,000

200,000,000

Loss on extinguishment of debt

2,000,000

1,000,000

Debt outstanding

1,805,000,000

1,805,000,000

1,607,000,000

1,805,000,000

Term Loan Facility | Secured Debt

Line of Credit Facility [Abstract]

Original Principal

$ 1,500,000,000

Blocked Term Loan | Secured Debt

Line of Credit Facility [Abstract]

Original Principal

$ 650,000,000

Term Loan Facility

Line of Credit Facility [Abstract]

Prepayment ratio greater than three but less than 2.75

50.00%

Prepayment ratio less than 2.75

0.00%

Term Loan Facility | Secured Debt

Line of Credit Facility [Abstract]

Debt discount

11,000,000

Standard Bank Term Loan Facility, Amortization Loan | Notes Payable to Banks

Line of Credit Facility [Abstract]

Original Principal

R 2,600,000,000

177,000,000

Periodic principal payment, percentage

500.00%

Maturity period of loan

5 years

Debt outstanding | R

R 1,700,000,000

Standard Bank Term Loan Facility, Amortization Loan | Notes Payable to Banks | Subsequent Event

Line of Credit Facility [Abstract]

Debt prepayment

$ 9,000,000

R 130,000,000

Standard Bank Term Loan Facility, Bullet Loan | Notes Payable to Banks

Line of Credit Facility [Abstract]

Original Principal | R

R 600,000,000

Standard Bank Term Loan Facility | Notes Payable to Banks

Line of Credit Facility [Abstract]

Original Principal

222,000,000

Debt outstanding

158,000,000

158,000,000

115,000,000

158,000,000

Tikon Loan | Loans Payable

Line of Credit Facility [Abstract]

Basis spread on variable rate

7.00%

Debt outstanding

16,000,000

16,000,000

17,000,000

16,000,000

¥ 111

Tikon Loan | Loans Payable | Subsequent Event

Line of Credit Facility [Abstract]

Debt prepayment

$ 6,000,000

¥ 41

Australian Government Loan | Loans Payable

Line of Credit Facility [Abstract]

Original Principal

5,000,000

$ 6,000,000

Debt outstanding

1,000,000

1,000,000

1,000,000

1,000,000

$ 1,500,000

Renewal term

5 years

MGT Loan

Line of Credit Facility [Abstract]

Note payable

36,000,000

$ 36,000,000

Notes payable due within 12 months

5,000,000

MGT Loan | Loans Payable

Line of Credit Facility [Abstract]

Debt outstanding

0

$ 0

$ 36,000,000

$ 0

Adjusted LIBOR | Term Loan Facility | Secured Debt

Line of Credit Facility [Abstract]

Basis spread on variable rate

3.00%

Johannesburg Interbank Average Rate, One | Standard Bank Term Loan Facility, Amortization Loan | Notes Payable to Banks

Line of Credit Facility [Abstract]

Net leverage ratio benchmark

1.5

Basis spread on variable rate

2.60%

Johannesburg Interbank Average Rate, Two | Standard Bank Term Loan Facility, Amortization Loan | Notes Payable to Banks

Line of Credit Facility [Abstract]

Net leverage ratio benchmark

1.5

Basis spread on variable rate

2.85%

Credit Facility | Standard Bank Credit Facility | Notes Payable to Banks

Line of Credit Facility [Abstract]

Maximum borrowing capacity

R 1,000,000,000

$ 68,000,000

Outstanding borrowings

0

Credit Facility | Johannesburg Interbank Average Rate, One | Standard Bank Credit Facility | Notes Payable to Banks

Line of Credit Facility [Abstract]

Net leverage ratio benchmark

1.5

Basis spread on variable rate

2.60%

Credit Facility | Johannesburg Interbank Average Rate, Two | Standard Bank Credit Facility | Notes Payable to Banks

Line of Credit Facility [Abstract]

Net leverage ratio benchmark

1.5

Basis spread on variable rate

2.85%

Credit Facility | Notes Payable to Banks | Saudi British Bank (SABB) Credit Facility

Line of Credit Facility [Abstract]

Maximum borrowing capacity

$ 19,000,000

$ 13,000,000

ر.س 50,000,000

ر.س 70,000,000

Proceeds from credit facility

$ 13,000,000

ر.س 50,000,000

Credit Facility | Notes Payable to Banks | Saudi Inter Bank Offered Rate | Saudi British Bank (SABB) Credit Facility

Line of Credit Facility [Abstract]

Basis spread on variable rate

1.80%

Wells Fargo Revolver | Adjusted LIBOR

Line of Credit Facility [Abstract]

Basis spread on variable rate

1.00%

Term of variable rate

1 month

Wells Fargo Revolver | Adjusted LIBOR | Minimum

Line of Credit Facility [Abstract]

Applicable margin added to variable interest rate

1.25%

Wells Fargo Revolver | Adjusted LIBOR | Maximum

Line of Credit Facility [Abstract]

Applicable margin added to variable interest rate

1.75%

Wells Fargo Revolver | Federal Funds Effective Swap Rate

Line of Credit Facility [Abstract]

Basis spread on variable rate

0.50%

Wells Fargo Revolver | Base Rate | Minimum

Line of Credit Facility [Abstract]

Applicable margin added to variable interest rate

0.25%

Wells Fargo Revolver | Base Rate | Maximum

Line of Credit Facility [Abstract]

Applicable margin added to variable interest rate

0.75%

Wells Fargo Revolver | Revolving Credit Facility

Line of Credit Facility [Abstract]

Loss on extinguishment of debt

$ 2,000,000

Maximum borrowing capacity

$ 350,000,000

$ 550,000,000

Outstanding borrowings

0

Debt issuance costs

2,000,000

Covenant, fixed charge coverage ratio, minimum

1

Wells Fargo Revolver | Letter of Credit

Line of Credit Facility [Abstract]

Maximum borrowing capacity

$ 85,000,000

Maturity date

Sep. 22, 2022

Outstanding borrowings

25,000,000

Revolving Credit Facility | Credit Facility | Emirates NBD PJSC

Line of Credit Facility [Abstract]

Debt outstanding, short-term

$ 0

Maximum borrowing capacity

$ 50,000,000

Revolving Credit Facility | Domestic Line of Credit | Emirates NBD PJSC

Line of Credit Facility [Abstract]

Basis spread on variable rate

2.25%

Revolving Credit Facility | Foreign Line of Credit | Emirates NBD PJSC

Line of Credit Facility [Abstract]

Basis spread on variable rate

2.25%

ABSA Revolver

Line of Credit Facility [Abstract]

Loss on extinguishment of debt

$ 1,000,000

Debt - Senior Notes (Details)

Debt - Senior Notes (Details) - USD ($)	May 01, 2020	Jun. 30, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 06, 2018	Sep. 22, 2017
Line of Credit Facility [Abstract]
Debt issuance costs			$ 35,000,000	$ 34,000,000
Debt extinguishment costs			$ (2,000,000)	$ (3,000,000)	$ (30,000,000)
Senior Notes due 2025
Line of Credit Facility [Abstract]
Interest rate			5.75%				5.75%
Original Principal			$ 450,000,000				$ 450,000,000
Senior Notes due 2026
Line of Credit Facility [Abstract]
Interest rate			6.50%			6.50%
Original Principal			$ 615,000,000			$ 615,000,000
Senior Notes Due 2022
Line of Credit Facility [Abstract]
Debt extinguishment costs		$ 30,000,000
Call premium		$ 22,000,000
Wells Faro Revolver, Standard Bank Credit Facility And Emirates Credit Facility | Revolving Credit Facility | Credit Facility
Line of Credit Facility [Abstract]
Repayments of Lines of Credit	$ 200,000,000
Senior Notes | Senior Notes due 2026
Line of Credit Facility [Abstract]
Debt issuance costs					$ 10,000,000

Debt - Interest and Debt Expens

Debt - Interest and Debt Expense, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Summary of interest and debt expense, net [Abstract]
Interest on debt	$ 174	$ 186	$ 180
Amortization of deferred debt issuance costs and discounts on debt	10	8	11
Capitalized interest	(2)	(1)	(3)
Interest on capital leases and letters of credit and commitments	7	8	5
Total interest and debt expense, net	189	201	$ 193
Deferred debt issuance costs	35	34
Debt discount	9	12
Wells Fargo Revolver
Summary of interest and debt expense, net [Abstract]
Deferred debt issuance costs	$ 2	$ 3

Derivative Financial Instrume_2

Derivative Financial Instruments - Fair Value of Derivatives Outstanding (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total derivatives, assets at fair value	$ 65	$ 37
Total derivatives, accrued liabilities at fair value	57	22
Prepaid and other assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total derivatives, assets at fair value	65	34
Other Noncurrent Assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total derivatives, assets at fair value		3
Derivatives Designated as Cash Flow Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total derivatives, assets at fair value	58	30
Total derivatives, accrued liabilities at fair value	57	22
Currency Contracts | Derivatives Designated as Cash Flow Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total derivatives, assets at fair value	58	30
Total derivatives, accrued liabilities at fair value	0	0
Currency Contracts | Derivatives Not Designated as Cash Flow Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total derivatives, assets at fair value	7	7
Total derivatives, accrued liabilities at fair value	0	0
Interest Rate Swaps | Derivatives Designated as Cash Flow Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total derivatives, assets at fair value	0	0
Total derivatives, accrued liabilities at fair value	$ 57	$ 22

Derivative Financial Instrume_3

Derivative Financial Instruments - Impact on Statement of Operation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue
Derivatives Designated as Hedging Instruments
Total Derivatives	$ (7)	$ 5
Cost of goods sold
Derivatives Designated as Hedging Instruments
Total Derivatives	3	3
Other Income (Expense), net
Derivatives Designated as Hedging Instruments
Total Derivatives	4	7
Currency Contracts | Revenue
Derivatives Not Designated as Hedging Instruments
Amount of Pre-Tax Gain (Loss) Recognized in Earnings	0	0
Derivatives Designated as Hedging Instruments
Amount of Pre-Tax Gain (Loss) Recognized in Earnings	(7)	5
Currency Contracts | Cost of goods sold
Derivatives Not Designated as Hedging Instruments
Amount of Pre-Tax Gain (Loss) Recognized in Earnings	0	0
Derivatives Designated as Hedging Instruments
Amount of Pre-Tax Gain (Loss) Recognized in Earnings	3	3
Currency Contracts | Other Income (Expense), net
Derivatives Not Designated as Hedging Instruments
Amount of Pre-Tax Gain (Loss) Recognized in Earnings	4	7
Derivatives Designated as Hedging Instruments
Amount of Pre-Tax Gain (Loss) Recognized in Earnings	$ 0	$ 0

Derivative Financial Instrume_4

Derivative Financial Instruments - Narrative (Details) R in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2020AUD ($)	Dec. 31, 2020ZAR (R)	Jun. 30, 2019USD ($)
Derivative [Line Items]
Interest expense	$ 189,000,000	$ 201,000,000	$ 193,000,000
Accumulated other comprehensive loss	(610,000,000)	(606,000,000)
Accumulated other comprehensive gain (loss)
Derivative [Line Items]
Accumulated other comprehensive loss	58,000,000	30,000,000
Interest Rate Swaps
Derivative [Line Items]
Notional amount						$ 750,000,000
Interest Rate Swaps | Accumulated other comprehensive gain (loss)
Derivative [Line Items]
Interest expense	10,000,000	1,000,000
Accumulated other comprehensive loss	(57,000,000)	$ (22,000,000)
Australian Dollar Exchange Contract
Derivative [Line Items]
Notional amount	254,000,000			$ 330
Foreign Exchange Contract, South African Rand | Derivatives Not Designated as Cash Flow Hedges
Derivative [Line Items]
Notional amount	24,000,000				R 354
Foreign Exchange Contract, Australian Dollars | Derivatives Not Designated as Cash Flow Hedges
Derivative [Line Items]
Notional amount	$ 41,000,000			$ 54

Fair Value Measurement (Details

Fair Value Measurement (Details) - USD ($) $ in Millions	Dec. 31, 2020	May 01, 2020	Dec. 31, 2019	Apr. 06, 2018	Sep. 22, 2017
Fair Value [Abstract]
Foreign currency contracts, net	$ 65		$ 37
Interest Rate Swaps
Fair Value [Abstract]
Interest rate swaps	57		22
Term Loan Facility
Fair Value [Abstract]
Fair value of debt	1,610		1,820
Standard Bank Term Loan Facility
Fair Value [Abstract]
Fair value of debt	115		158
Senior Notes due 2025
Fair Value [Abstract]
Fair value of debt	$ 468		459
Annual Interest Rate	5.75%				5.75%
Senior Notes due 2026
Fair Value [Abstract]
Fair value of debt	$ 641		636
Annual Interest Rate	6.50%			6.50%
6.5% Senior Secured Notes due 2025 | Senior Notes
Fair Value [Abstract]
Annual Interest Rate	6.50%	6.50%
6.5% Senior Secured Notes due 2025 | Fair Value, Inputs, Level 1
Fair Value [Abstract]
Fair value of debt	$ 536		0
Tikon Loan
Fair Value [Abstract]
Fair value of debt	17		16
Australian Government Loan
Fair Value [Abstract]
Fair value of debt	1		1
MGT Loan
Fair Value [Abstract]
Fair value of debt	$ 36		$ 0

Leases - Lease Expenses (Detail

Leases - Lease Expenses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 48	$ 41
Amortization of right-of-use assets	1	1
Interest on lease liabilities	2	2
Short term lease expense	26	22
Variable lease expense	22	20
Total lease expense	99	86
Cost of goods sold
Lessee, Lease, Description [Line Items]
Total lease expense	91	80
Selling, general and administrative expenses
Lessee, Lease, Description [Line Items]
Total lease expense	$ 8	$ 6

Leases - Weighted-Average Remai

Leases - Weighted-Average Remaining Lease Terms and Discount Rates for Operating and Finance Leases (Details)	Dec. 31, 2020	Dec. 31, 2019
Weighted-average remaining lease term:
Operating leases	3 years 3 months 18 days	3 years 8 months 12 days
Finance leases	9 years 7 months 6 days	10 years 4 months 24 days
Weighted-average discount rate:
Operating leases	7.70%	8.50%
Finance leases	14.20%	14.20%

Leases - Maturities of Lease Li

Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Operating Leases
2021	$ 44
2022	23
2023	9
2024	7
2025	2
Thereafter	6
Total lease payments	91
Less: imputed interest	(11)
Present value of lease payments	80
Finance Leases
2021	3
2022	3
2023	3
2024	3
2025	3
Thereafter	12
Total lease payments	27
Less: imputed interest	(12)
Present value of lease payments	$ 15	$ 15

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Principal payments on finance leases (less than)	$ 1	$ 1	$ 1
Lease not yet commenced, Right-of-use Asset	$ 63
Lease not yet commenced, term of contract	15 years
Cost of goods sold
Lessee, Lease, Description [Line Items]
Rent expense			22
Selling, general and administrative expenses
Lessee, Lease, Description [Line Items]
Rent expense			$ 2

Leases - Cash Paid for Amounts

Leases - Cash Paid for Amounts Included in the Measurements of Lease Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used for operating leases	$ 55	$ 41
Operating cash flows used for finance leases	2	2
Financing cash flows used for finance leases	$ 1	$ 1	$ 1

Leases - Additional Information

Leases - Additional Information Relating to ROU Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating leases obtained in the normal course of business	$ 29	$ 28
Operating leases acquired in connection with Cristal acquisition	$ 0	$ 40

Asset Retirement Obligations (D

Asset Retirement Obligations (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Activity related to asset retirement obligations [Roll Forward]
Balance, January 1	$ 158	$ 74
Additions	1	3
Accretion expense	12	10
Remeasurement/translation	7	0
Changes in estimates, including cost and timing of cash flows	(1)	(8)
Settlements/payments	(15)	(4)
Transferred in with the acquisition of Cristal	0	83
Balance, December 31	166	158
Asset retirement obligations [Abstract]
Current portion included in “Accrued liabilities”			$ 9	$ 16
Noncurrent portion included in “Asset retirement obligations”			157	142
Asset retirement obligations	166	158	166	158
Assumptions used in determining asset retirement obligations [Abstract]
Environmental rehabilitation trust assets			$ 12	$ 14
Henderson Electrolytic Operations
Activity related to asset retirement obligations [Roll Forward]
Other acquisition and divestiture related	$ (4)	$ 0
Minimum | Measurement Input, Discount Rate
Assumptions used in determining asset retirement obligations [Abstract]
Measurement input in determining asset retirement obligation			0.016
Minimum | Measurement Input, Risk Free Interest Rate
Assumptions used in determining asset retirement obligations [Abstract]
Measurement input in determining asset retirement obligation			0.032
Maximum | Measurement Input, Discount Rate
Assumptions used in determining asset retirement obligations [Abstract]
Measurement input in determining asset retirement obligation			0.044
Maximum | Measurement Input, Risk Free Interest Rate
Assumptions used in determining asset retirement obligations [Abstract]
Measurement input in determining asset retirement obligation			0.177
Mines | Minimum
Assumptions used in determining asset retirement obligations [Abstract]
Estimated useful life	1 year
Mines | Maximum
Assumptions used in determining asset retirement obligations [Abstract]
Estimated useful life	26 years
Other Assets | Minimum
Assumptions used in determining asset retirement obligations [Abstract]
Estimated useful life	3 years
Other Assets | Maximum
Assumptions used in determining asset retirement obligations [Abstract]
Estimated useful life	33 years

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($) $ in Millions	May 01, 2019	Jun. 30, 2019	May 31, 2019	Dec. 31, 2020
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Purchase commitments for 2021				$ 194
Purchase commitments for 2022				84
Purchase commitments for 2023				62
Purchase commitments for 2024				56
Purchase commitments for 2025				44
Purchase commitments due thereafter				135
Commitments and Contingencies [Abstract]
Loss contingency				71
Loss contingency provision				60
Discontinued Operations, Disposed of by Sale | Cristal, North America TiO2 Business
Commitments and Contingencies [Abstract]
Proceeds from divestiture of business, net of transaction costs	$ 701
Venator Materials PLC VS. Tronox Limited
Commitments and Contingencies [Abstract]
Damages sought		$ 400
Venator Materials PLC VS. Tronox Limited | Venator Materials PLC
Commitments and Contingencies [Abstract]
Damages sought			$ 75
Wells Fargo Revolver | Letters of Credit
Commitments and Contingencies [Abstract]
Loss contingency				26
ABSA Revolver | Bank Guarantees
Commitments and Contingencies [Abstract]
Loss contingency				$ 45

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) Attributable to Tronox Holdings plc and Other Equity Items - Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 916	$ 862	$ 1,015
Acquisition of noncontrolling interest	(3)	(148)
Ending Balance	1,871	916	862
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(606)	(540)	(403)
Other comprehensive income (loss)	(12)	0	(137)
Amounts reclassified from accumulated other comprehensive income (loss)	8	(5)	0
Acquisition of noncontrolling interest		(61)
Ending Balance	(610)	(606)	(540)
Cumulative Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(503)	(445)	(312)
Other comprehensive income (loss)	12	3	(133)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0
Acquisition of noncontrolling interest		(61)
Ending Balance	(491)	(503)	(445)
Pension Liability Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(104)	(95)	(90)
Other comprehensive income (loss)	(20)	(11)	(5)
Amounts reclassified from accumulated other comprehensive income (loss)	4	2	0
Acquisition of noncontrolling interest		0
Ending Balance	(120)	(104)	(95)
Unrealized Gains (losses) on Derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	1	0	(1)
Other comprehensive income (loss)	(4)	8	1
Amounts reclassified from accumulated other comprehensive income (loss)	4	(7)	0
Acquisition of noncontrolling interest		0
Ending Balance	$ 1	$ 1	$ 0

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) Attributable to Tronox Holdings plc and Other Equity Items - Narrative (Details) - USD ($)	May 09, 2019	Dec. 31, 2019	Jun. 03, 2019
Related Party Transaction [Line Items]
Shares repurchased (in shares)		7,453,391
Stock repurchase program, authorized amount			$ 100,000,000
Stock repurchased, average price (in dollar per share)		$ 11.59
Shares repurchased, aggregate purchase price		$ 87,000,000
Exxaro Mineral Sands Transaction Completion Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Shares repurchased (in shares)	14,000,000

Share-based Compensation - Shar

Share-based Compensation - Share-based Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation [Abstract]
Total share-based compensation expense (continuing operations)	$ 30	$ 32	$ 21
Restricted Shares and Restricted Share Units (RSUs)
Share-based Compensation [Abstract]
Total share-based compensation expense (continuing operations)	30	32	21
Employee Stock Option
Share-based Compensation [Abstract]
Total share-based compensation expense (continuing operations)	$ 0	$ 0	$ 0

Share-based Compensation - Narr

Share-based Compensation - Narrative (Details)

Jun. 24, 2020shares

Jun. 30, 2020shares

Dec. 31, 2019USD ($)shares

Sep. 30, 2019shares

Dec. 31, 2018shares

Sep. 30, 2018shares

Jun. 30, 2018USD ($)shares

Dec. 31, 2020USD ($)performancePeriod$ / sharesshares

Dec. 31, 2019USD ($)$ / sharesshares

Dec. 31, 2018USD ($)$ / shares

Dec. 31, 2017shares

Jun. 30, 2021shares

May 31, 2021shares

Share-based Compensation [Abstract]

Credit for reversal of stock compensation expense | $

$ (4,000,000)

Cash received from exercise of stock options | $

$ 4,000,000

Restricted Stock

Share-based Compensation [Abstract]

Equity instruments other than options, vested in period

1,000,000

1,000,000

Restricted Share Units (RSUs)

Share-based Compensation [Abstract]

Equity instruments other than options, vested in period

2,033,591

Granted (in shares)

3,982,816

Nonvested shares which will vest in the future (in shares)

5,557,659

7,303,905

5,557,659

Granted (in dollars per share) | $ / shares

$ 8.89

$ 10.81

$ 19.23

Unrecognized compensation expense related to nonvested restricted shares and nonvested RSUs, adjusted for estimated forfeitures | $

$ 32,000,000

Weighted average period of recognition for unrecognized compensation expense

1 year 8 months 12 days

Total fair value of restricted shares and RSUs vested | $

$ 30,000,000

$ 20,000,000

$ 17,000,000

Restricted Stock Units (RSUs), Performance-Based Awards

Share-based Compensation [Abstract]

Equity instruments other than options, vested in period

471,626

Granted (in shares)

1,533,008

Granted (in dollars per share) | $ / shares

$ 12.65

$ 20.80

Restricted Stock Units (RSUs), Performance-Based Awards | Share-based Payment Arrangement, Tranche One

Share-based Compensation [Abstract]

Granted (in shares)

766,504

Award performance Period

3 years

Granted (in dollars per share) | $ / shares

$ 10

Restricted Stock Units (RSUs), Performance-Based Awards | Share-based Payment Arrangement, Tranche Two

Share-based Compensation [Abstract]

Granted (in shares)

766,504

Number of performance periods | performancePeriod

3

Restricted Stock Units (RSUs), Time-Based Awards

Share-based Compensation [Abstract]

Award vesting period

3 years

Restricted Stock Units (RSUs), Time-Based Awards | Management

Share-based Compensation [Abstract]

Granted (in shares)

1,784,377

Restricted Stock Units (RSUs), Time-Based Awards | Director

Share-based Compensation [Abstract]

Equity instruments other than options, vested in period

21,654

Granted (in shares)

193,805

Restricted Stock Units (RSUs), Time-Based Awards | Director | Subsequent Event

Share-based Compensation [Abstract]

Nonvested shares which will vest in the future (in shares)

10,431

161,720

Employee Stock Option

Share-based Compensation [Abstract]

Award vesting period

3 years

Intrinsic value of options exercised | $

$ 1,000,000

Unrecognized compensation expense related to options, adjusted for estimated forfeitures | $

$ 0

$ 0

$ 0

Class A

Share-based Compensation [Abstract]

Number of shares, awards granted (in shares)

20,781,225

Tronox Holdings Plc Amended And Restated Management Equity Incentive Plan

Share-based Compensation [Abstract]

Number of additional shares authorized

8,000,000

Integration Incentive Award | Restricted Share Units (RSUs) | Executive Officers and Managers

Share-based Compensation [Abstract]

Granted (in shares)

139,225

Award vesting period

2 years

Reversal of compensation expense | $

$ 6,000,000

Integration Incentive Award | Restricted Stock Units (RSUs), Performance-Based Awards | Executive Officers and Managers

Share-based Compensation [Abstract]

Granted (in shares)

1,397,471

Modified Integration Incentive Award | Restricted Stock Units (RSUs), Performance-Based Awards

Share-based Compensation [Abstract]

Granted (in shares)

16,750

65,387

40,161

90,161

Award vesting period

2 years

Share-based Compensation - Weig

Share-based Compensation - Weighted-Average Assumptions Utilized to Value Grants (Details) - Restricted Stock Units (RSUs), Performance-Based Awards	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected historical volatility	58.30%	67.20%	80.40%
Risk free interest rate	1.42%	2.50%	2.32%
Expected life (in years)	3 years	3 years	3 years
Share-based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	2.13%

Share-Based Compensation - Rest

Share-Based Compensation - Restricted Shares and RSUs (Details) - Restricted Stock Units (RSUs) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Number of Shares
Outstanding, beginning of period (in shares)	5,557,659
Granted (in shares)	3,982,816
Vested (in shares)	(2,033,591)
Forfeited (in shares)	(202,979)
Outstanding, end of period (in shares)	7,303,905	5,557,659
Expected to vest (in shares)	6,805,041
Weighted Average Grant Date Fair Value
Outstanding, beginning of period (in dollars per share)	$ 15.19
Granted (in dollars per share)	8.89	$ 10.81	$ 19.23
Vested (in dollars per share)	14.56
Forfeited (in dollars per share)	11.75
Outstanding, ending of period (in dollars per share)	12.39	$ 15.19
Expected to vest, ending of period (in dollars per share)	$ 12.21

Share-Based Compensation - Opti

Share-Based Compensation - Option Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Number of Options
Outstanding, beginning of period (in shares)	1,260,902
Exercised (in shares)	0
Forfeited (in shares)	0
Expired (in shares)	(59,011)
Outstanding, end of period (in shares)	1,201,891	1,260,902
Exercisable, end of period (in shares)	1,201,891
Weighted Average Exercise Price
Outstanding, beginning of period (in dollars per share)	$ 21.54
Exercised (in dollars per share)	0
Forfeited (in dollars per share)	0
Expired (in dollars per share)	20.22
Outstanding, end of period (in dollars per share)	21.60	$ 21.54
Exercisable, end of period (in dollars per share)	$ 21.60
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual life, outstanding	2 years 2 months 8 days	3 years 2 months 4 days
Weighted average remaining contractual life, exercisable, end of period	2 years 2 months 8 days
Intrinsic value, beginning of period	$ 0
Intrinsic value, end of period	0	$ 0
Intrinsic value, exercisable	$ 0

Pension and Other Postretirem_3

Pension and Other Postretirement Healthcare Benefits (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)plan	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2015USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of plans | plan	1
Pension amounts	$ 539	$ 505
Other Post Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Settlement gain (loss) recorded in other income (expense)	0	0	$ 3
Other Post Retirement Benefit Plans | U.S. operations
Defined Benefit Plan Disclosure [Line Items]
Settlement gain deferred in accumulated other comprehensive loss				$ 3
Settlement gain (loss) recorded in other income (expense)			3
Employer contributions	0	0
Pension amounts	0	0	0
Other Post Retirement Benefit Plans | International
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	0	0
Pension amounts	$ 0	0	0
Other Post Retirement Benefit Plans | South Africa
Defined Benefit Plan Disclosure [Line Items]
Percentage of post-retirement and death-in-service benefits for members employed before March 1, 1994	100.00%
Annual percentage of post-retirement and death-in-service benefits for members employed on or after March 1, 1994 but before January 1, 2002	2.00%
Percentage of post-retirement and death-in-service benefits for members employed on or after January 1, 2002	0.00%
Other Post Retirement Benefit Plans | South Africa | Maximum
Defined Benefit Plan Disclosure [Line Items]
Percentage of post-retirement and death-in-service benefits for members employed on or after March 1, 1994 but before January 1, 2002	50.00%
Pensions
Defined Benefit Plan Disclosure [Line Items]
Settlement gain (loss) recorded in other income (expense)	$ 0	1	0
Employer contributions	17
Contributions expected in the next year	$ 2
Pensions | Retirement Plan Name, Other
Defined Benefit Plan Disclosure [Line Items]
Required employer contribution percentage	21.20%
Pensions | U.S. operations
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 22	10
Pension amounts	344	319	243
Pensions | International
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	3	7
Pension amounts	195	$ 186	$ 0
Pensions | Australia
Defined Benefit Plan Disclosure [Line Items]
Pension amounts	$ 4

Pension and Other Postretirem_4

Pension and Other Postretirement Healthcare Benefits, Multiemployer Plans (Details) - Pension Plan - Retirement Plan Name, Other - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Multiemployer Plans [Abstract]
Pension Fund	PGB
Pension Protection Act Zone Status		Green
FIP/RP Pending/ Implemented	No
Tronox Contributions	$ 5	$ 4
Surcharge Imposed	No
Expiration date of Collective- Bargaining Agreement	Dec. 31, 2024

Pension and Other Postretirem_5

Pension and Other Postretirement Healthcare Benefits, Summary of Benefit Obligations and Plan Assets Associated with Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in plan assets:
Fair value of plan assets, beginning of year	$ 505
Fair value of plan assets, end of year	539	$ 505
Classification of amounts recognized in the Consolidated Balance Sheets:
Pension and postretirement healthcare benefits	(146)	(160)
Pensions
Change in benefit obligations:
Service cost	5	4	$ 0
Interest cost	17	21	13
Change in plan assets:
Employer contributions	17
Other Post Retirement Benefit Plans
Change in benefit obligations:
Service cost	0	0	0
Interest cost	1	1	1
U.S. operations | Pensions
Change in benefit obligations:
Benefit obligation, beginning of year	398	329
Service cost	1	1
Interest cost	12	16
Net actuarial (gains) losses	28	36
Acquisition, net	0	106
Curtailments	(2)	0
Settlements	(7)	(59)
Plan amendments	0	0
Foreign currency rate changes	0	0
Benefits paid	(31)	(31)
Benefit obligation, end of year	399	398	329
Change in plan assets:
Fair value of plan assets, beginning of year	319	243
Actual return on plan assets	41	51
Acquisition, net	0	105
Employer contributions	22	10
Benefits paid	(31)	(31)
Foreign currency rate changes	0	0
Settlements	(7)	(59)
Fair value of plan assets, end of year	344	319	243
Net underfunded status of plans	(55)	(79)
Classification of amounts recognized in the Consolidated Balance Sheets:
Other long-term assets	0	6
Accrued liabilities	0	0
Pension and postretirement healthcare benefits	(55)	(85)
Total liabilities	(55)	(85)
Accumulated other comprehensive (income) loss	98	96
Total	43	17
U.S. operations | Other Post Retirement Benefit Plans
Change in benefit obligations:
Benefit obligation, beginning of year	2	0
Service cost	0	0
Interest cost	0	0
Net actuarial (gains) losses	0	0
Acquisition, net	0	2
Curtailments	0	0
Settlements	0	0
Plan amendments	0	0
Foreign currency rate changes	0	0
Benefits paid	0	0
Benefit obligation, end of year	2	2	0
Change in plan assets:
Fair value of plan assets, beginning of year	0	0
Actual return on plan assets	0	0
Acquisition, net	0	0
Employer contributions	0	0
Benefits paid	0	0
Foreign currency rate changes	0	0
Settlements	0	0
Fair value of plan assets, end of year	0	0	0
Net underfunded status of plans	(2)	(2)
Classification of amounts recognized in the Consolidated Balance Sheets:
Other long-term assets	0	0
Accrued liabilities	0	0
Pension and postretirement healthcare benefits	(2)	(2)
Total liabilities	(2)	(2)
Accumulated other comprehensive (income) loss	0	0
Total	(2)	(2)
International | Pensions
Change in benefit obligations:
Benefit obligation, beginning of year	232	0
Service cost	4	3
Interest cost	5	4
Net actuarial (gains) losses	20	6
Acquisition, net	0	230
Curtailments	0	0
Settlements	(6)	(3)
Plan amendments	0	0
Foreign currency rate changes	6	2
Benefits paid	(9)	(10)
Benefit obligation, end of year	252	232	0
Change in plan assets:
Fair value of plan assets, beginning of year	186	0
Actual return on plan assets	15	6
Acquisition, net	0	184
Employer contributions	3	7
Benefits paid	(9)	(10)
Foreign currency rate changes	6	2
Settlements	(6)	(3)
Fair value of plan assets, end of year	195	186	0
Net underfunded status of plans	(57)	(46)
Classification of amounts recognized in the Consolidated Balance Sheets:
Other long-term assets	14	20
Accrued liabilities	(5)	(6)
Pension and postretirement healthcare benefits	(66)	(60)
Total liabilities	(71)	(66)
Accumulated other comprehensive (income) loss	12	4
Total	(45)	(42)
International | Other Post Retirement Benefit Plans
Change in benefit obligations:
Benefit obligation, beginning of year	13	7
Service cost	0	0
Interest cost	1	1
Net actuarial (gains) losses	3	2
Acquisition, net	0	3
Curtailments	(1)	0
Settlements	0	0
Plan amendments	9	0
Foreign currency rate changes	(2)	0
Benefits paid	0	0
Benefit obligation, end of year	23	13	7
Change in plan assets:
Fair value of plan assets, beginning of year	0	0
Actual return on plan assets	0	0
Acquisition, net	0	0
Employer contributions	0	0
Benefits paid	0	0
Foreign currency rate changes	0	0
Settlements	0	0
Fair value of plan assets, end of year	0	0	$ 0
Net underfunded status of plans	(23)	(13)
Classification of amounts recognized in the Consolidated Balance Sheets:
Other long-term assets	0	0
Accrued liabilities	0	0
Pension and postretirement healthcare benefits	(23)	(13)
Total liabilities	(23)	(13)
Accumulated other comprehensive (income) loss	12	1
Total	$ (11)	$ (12)

Pension and Other Postretirem_6

Pension and Other Postretirement Healthcare Benefits, Accumulated Benefit Obligations and Projected Benefit Obligations (Details) - Pensions $ in Millions	Dec. 31, 2020USD ($)
U.S. operations
Pension and Other Postretirement Healthcare Benefits [Abstract]
Projected benefit obligation (PBO)	$ 399
Accumulated benefit obligation (ABO)	399
Fair value of plan assets	344
International
Pension and Other Postretirement Healthcare Benefits [Abstract]
Projected benefit obligation (PBO)	71
Accumulated benefit obligation (ABO)	46
Fair value of plan assets	$ 0

Pension and Other Postretirem_7

Pension and Other Postretirement Healthcare Benefits, Summary of Expected Benefit Payments (Details) $ in Millions	Dec. 31, 2020USD ($)
U.S. operations | Pensions
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2021	$ 31
2022	31
2023	28
2024	27
2025	27
2026-2030	119
U.S. operations | Other Post Retirement Benefit Plans
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2021	0
2022	0
2023	0
2024	0
2025	0
2026-2030	1
International | Pensions
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2021	12
2022	9
2023	11
2024	11
2025	12
2026-2030	63
International | Other Post Retirement Benefit Plans
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2021	0
2022	0
2023	1
2024	1
2025	1
2026-2030	$ 8

Pension and Other Postretirem_8

Pension and Other Postretirement Healthcare Benefits, Components of Net Periodic Pension and Postretirement Healthcare Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pensions
Net periodic cost:
Service cost	$ 5	$ 4	$ 0
Interest cost	17	21	13
Expected return on plan assets	(22)	(22)	(15)
Net amortization of actuarial loss	4	2	3
Settlement losses (gains)	0	(1)	0
Curtailment (gains)	(2)	0	0
Total net periodic cost - continuing operations	2	4	1
Other Post Retirement Benefit Plans
Net periodic cost:
Service cost	0	0	0
Interest cost	1	1	1
Expected return on plan assets	0	0	0
Net amortization of actuarial loss	0	0	0
Settlement losses (gains)	0	0	(3)
Curtailment (gains)	0	0	0
Total net periodic cost - continuing operations	$ 1	$ 1	$ (2)

Pension and Other Postretirem_9

Pension and Other Postretirement Healthcare Benefits, Weighted Average Assumptions Used (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pensions | U.S. operations
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	3.39%	4.34%	3.71%
Expected return on plan assets	6.03%	5.69%	5.64%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.60%	3.39%	4.40%
Rate of compensation increase	3.00%	3.00%
Pensions | International
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	1.98%	2.50%
Expected return on plan assets	2.50%	3.00%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	1.45%	1.98%
Rate of compensation increase	4.65%	4.67%
Other Post Retirement Benefit Plans | U.S. operations
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	3.36%	4.00%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.59%	3.36%
Other Post Retirement Benefit Plans | International
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	8.72%	10.25%	11.54%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	9.51%	9.91%	11.38%

Pension and Other Postretire_10

Pension and Other Postretirement Healthcare Benefits, Asset Categories and Associated Asset Allocations for Company's Funded Retirement Plans (Details)	Dec. 31, 2020	Dec. 31, 2019
U.S. operations
Pension and Other Postretirement Healthcare Benefits [Abstract]
Actual	100.00%
Target	100.00%
U.S. operations | Global comingled equity funds
Pension and Other Postretirement Healthcare Benefits [Abstract]
Actual	43.00%
Target	42.00%
U.S. operations | Debt securities
Pension and Other Postretirement Healthcare Benefits [Abstract]
Actual	39.00%
Target	40.00%
U.S. operations | Real estate
Pension and Other Postretirement Healthcare Benefits [Abstract]
Actual	1.00%
Target	0.00%
U.S. operations | Other
Pension and Other Postretirement Healthcare Benefits [Abstract]
Actual	17.00%
Target	18.00%
U.S. operations | Qualified Plan
Pension and Other Postretirement Healthcare Benefits [Abstract]
Actual		100.00%
Target		100.00%
U.S. operations | Qualified Plan | Global comingled equity funds
Pension and Other Postretirement Healthcare Benefits [Abstract]
Actual		50.00%
Target		49.00%
U.S. operations | Qualified Plan | Debt securities
Pension and Other Postretirement Healthcare Benefits [Abstract]
Actual		48.00%
Target		48.00%
U.S. operations | Qualified Plan | Real estate
Pension and Other Postretirement Healthcare Benefits [Abstract]
Actual		1.00%
Target		0.00%
U.S. operations | Qualified Plan | Other
Pension and Other Postretirement Healthcare Benefits [Abstract]
Actual		1.00%
Target		3.00%
International
Pension and Other Postretirement Healthcare Benefits [Abstract]
Actual	100.00%	100.00%
Target	100.00%	100.00%
International | Global comingled equity funds
Pension and Other Postretirement Healthcare Benefits [Abstract]
Actual	0.00%	7.00%
Target	0.00%	4.00%
International | Debt securities
Pension and Other Postretirement Healthcare Benefits [Abstract]
Actual	39.00%	26.00%
Target	30.00%	25.00%
International | Real estate
Pension and Other Postretirement Healthcare Benefits [Abstract]
Actual	0.00%	0.00%
Target	0.00%	0.00%
International | Other
Pension and Other Postretirement Healthcare Benefits [Abstract]
Actual	61.00%	67.00%
Target	70.00%	71.00%

Pension and Other Postretire_11

Pension and Other Postretirement Healthcare Benefits, Summary of Fair Value of Pension Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	$ 505
Change in plan assets:
Fair value of plan assets, beginning of year	505
Fair value of plan assets, end of year	539	$ 505
Quoted Prices in Active Markets for Identical Assets (Level 1)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	314
Change in plan assets:
Fair value of plan assets, beginning of year	314
Fair value of plan assets, end of year	322	314
Significant Other Observable Inputs (Level 2)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	87
Change in plan assets:
Fair value of plan assets, beginning of year	87
Fair value of plan assets, end of year	106	87
Significant Unobservable Inputs (Level 3)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	104
Change in plan assets:
Fair value of plan assets, beginning of year	104
Fair value of plan assets, end of year	111	104
Global equity securities
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	68
Change in plan assets:
Fair value of plan assets, beginning of year	68
Fair value of plan assets, end of year	83	68
Global equity securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	68
Change in plan assets:
Fair value of plan assets, beginning of year	68
Fair value of plan assets, end of year	83	68
Global equity securities | Significant Other Observable Inputs (Level 2)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
Global equity securities | Significant Unobservable Inputs (Level 3)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
Global comingled equity funds
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	104
Change in plan assets:
Fair value of plan assets, beginning of year	104
Fair value of plan assets, end of year	66	104
Global comingled equity funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	104
Change in plan assets:
Fair value of plan assets, beginning of year	104
Fair value of plan assets, end of year	66	104
Global comingled equity funds | Significant Other Observable Inputs (Level 2)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
Global comingled equity funds | Significant Unobservable Inputs (Level 3)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
US government bonds
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	69
Change in plan assets:
Fair value of plan assets, beginning of year	69
Fair value of plan assets, end of year	70	69
US government bonds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	69
Change in plan assets:
Fair value of plan assets, beginning of year	69
Fair value of plan assets, end of year	70	69
US government bonds | Significant Other Observable Inputs (Level 2)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
US government bonds | Significant Unobservable Inputs (Level 3)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
Foreign government bonds
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	34
Change in plan assets:
Fair value of plan assets, beginning of year	34
Fair value of plan assets, end of year	37	34
Foreign government bonds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	34
Change in plan assets:
Fair value of plan assets, beginning of year	34
Fair value of plan assets, end of year	37	34
Foreign government bonds | Significant Other Observable Inputs (Level 2)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
Foreign government bonds | Significant Unobservable Inputs (Level 3)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
US corporate bonds
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	79
Change in plan assets:
Fair value of plan assets, beginning of year	79
Fair value of plan assets, end of year	62	79
US corporate bonds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
US corporate bonds | Significant Other Observable Inputs (Level 2)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	79
Change in plan assets:
Fair value of plan assets, beginning of year	79
Fair value of plan assets, end of year	62	79
US corporate bonds | Significant Unobservable Inputs (Level 3)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
Foreign corporate bonds
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	22
Change in plan assets:
Fair value of plan assets, beginning of year	22
Fair value of plan assets, end of year	43	22
Foreign corporate bonds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	16
Change in plan assets:
Fair value of plan assets, beginning of year	16
Fair value of plan assets, end of year	0	16
Foreign corporate bonds | Significant Other Observable Inputs (Level 2)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	6
Change in plan assets:
Fair value of plan assets, beginning of year	6
Fair value of plan assets, end of year	43	6
Foreign corporate bonds | Significant Unobservable Inputs (Level 3)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
Property/ real estate fund
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	1
Change in plan assets:
Fair value of plan assets, beginning of year	1
Fair value of plan assets, end of year	1	1
Property/ real estate fund | Quoted Prices in Active Markets for Identical Assets (Level 1)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
Property/ real estate fund | Significant Other Observable Inputs (Level 2)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	1
Change in plan assets:
Fair value of plan assets, beginning of year	1
Fair value of plan assets, end of year	1	1
Property/ real estate fund | Significant Unobservable Inputs (Level 3)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
Insurance contracts
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	104
Change in plan assets:
Fair value of plan assets, beginning of year	104
Fair value of plan assets, end of year	111	104
Insurance contracts | Quoted Prices in Active Markets for Identical Assets (Level 1)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
Insurance contracts | Significant Other Observable Inputs (Level 2)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
Insurance contracts | Significant Unobservable Inputs (Level 3)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	104	0
Change in plan assets:
Fair value of plan assets, beginning of year	104	0
Actual return on plan assets	9	2
Purchases, sales, settlements	(5)	101
Transfers in/out of Level 3	0	0
Foreign currency rate changes	3	1
Fair value of plan assets, end of year	111	104
Alternative investments
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	1
Change in plan assets:
Fair value of plan assets, beginning of year	1
Fair value of plan assets, end of year		1
Alternative investments | Quoted Prices in Active Markets for Identical Assets (Level 1)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year		0
Alternative investments | Significant Other Observable Inputs (Level 2)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	1
Change in plan assets:
Fair value of plan assets, beginning of year	1
Fair value of plan assets, end of year		1
Alternative investments | Significant Unobservable Inputs (Level 3)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year		0
Cash & cash equivalents
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	23
Change in plan assets:
Fair value of plan assets, beginning of year	23
Fair value of plan assets, end of year	66	23
Cash & cash equivalents | Quoted Prices in Active Markets for Identical Assets (Level 1)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	23
Change in plan assets:
Fair value of plan assets, beginning of year	23
Fair value of plan assets, end of year	66	23
Cash & cash equivalents | Significant Other Observable Inputs (Level 2)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	0	0
Cash & cash equivalents | Significant Unobservable Inputs (Level 3)
Pension and Other Postretirement Healthcare Benefits [Abstract]
Fair value of plan assets, beginning of year	0
Change in plan assets:
Fair value of plan assets, beginning of year	0
Fair value of plan assets, end of year	$ 0	$ 0

Pension and Other Postretire_12

Pension and Other Postretirement Healthcare Benefits, Defined Contribution Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2013	Dec. 31, 2006
Qualified Plan | U.S. Savings Investment Plan
Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution percentage, first portion	100.00%
Employee contribution percentage, first portion	6.00%
Discretionary contribution percentage	6.00%	6.00%	6.00%	6.00%
Discretionary contribution vesting period	3 years
Compensation expenses associated with matching contribution	$ 4	$ 4	$ 4
Compensation expense associated with discretionary contribution	4	4	5
Nonqualified Plan | U.S. Benefit Restoration Plan
Defined Contribution Plan Disclosure [Line Items]
Compensation expenses associated with matching contribution	$ 1	$ 2	$ 1
Maximum annual contributions per employee, percent					20.00%

Related Party Transactions (Det

Related Party Transactions (Details) $ / shares in Units, R in Millions, $ in Millions	May 13, 2020USD ($)	May 09, 2019USD ($)day$ / sharesshares	Apr. 10, 2019USD ($)shares	Feb. 15, 2019USD ($)	Feb. 15, 2019ZAR (R)	Dec. 31, 2020USD ($)shares	Dec. 31, 2020USD ($)shares	Dec. 31, 2019USD ($)shares	Dec. 31, 2018USD ($)	Dec. 17, 2020USD ($)	Dec. 29, 2019USD ($)	May 09, 2018USD ($)
Related Party Transaction [Line Items]
Number of shares held by affiliate | shares							14,700,000
Cash consideration							$ 0	$ 1,675	$ 0
Common stock, shares outstanding (in shares) | shares						143,557,479	143,557,479	141,900,459
Other income (expense), net							$ 26	$ 3	33
Prepaid and other assets						$ 200	200	143
Related party payables						7	7	7
MGT Loan
Related Party Transaction [Line Items]
Note payable						36	36			$ 36
Notes payable due within 12 months						$ 5	$ 5
Tronox Sands LLP
Related Party Transaction [Line Items]
Payments to acquire interest in subsidiaries				$ 148
Cristal, TiO2 Business
Related Party Transaction [Line Items]
Cash consideration			$ 1,675
Tronox Holdings plc shares issued (in shares) | shares			37,580,000
Cristal International Holdings B.V.
Related Party Transaction [Line Items]
Ownership percentage						26.00%	26.00%
Common stock, shares outstanding (in shares) | shares						37,580,000	37,580,000
Exxaro
Related Party Transaction [Line Items]
Ownership percentage						10.30%	10.30%
Selling, general and administrative expenses to related party transaction									$ 1
Exxaro | South African Subsidiaries
Related Party Transaction [Line Items]
Ownership percentage						26.00%	26.00%
Exxaro | Tronox Sands LLP
Related Party Transaction [Line Items]
Ownership percentage		26.00%
Payments to acquire interest in subsidiaries | R					R 2,060
Affiliated Entity | Purchase Of Chlorine Gas
Related Party Transaction [Line Items]
Purchases from related party						$ 1	$ 5
Affiliated Entity | Exxaro Resources Limited | Exxaro Mineral Sands Transaction Completion Agreement
Related Party Transaction [Line Items]
Due to related party						4	4
Affiliated Entity | Advanced Metal Industries Cluster Company Limited | Option Agreement, Option To Acquire Special Purchase Vehicle
Related Party Transaction [Line Items]
Ownership percentage by related party												90.00%
Affiliated Entity | Advanced Metal Industries Cluster Company Limited | Option Agreement, Total Indebtedness
Related Party Transaction [Line Items]
Notes receivable from related party												$ 322
Affiliated Entity | Advanced Metal Industries Cluster Company Limited | Option Agreement, Amount Loaned For Capital Expenditures And Operational Expenses, Interest Earned
Related Party Transaction [Line Items]
Notes receivable from related party						6	6	3
Affiliated Entity | Advanced Metal Industries Cluster Company Limited | Acquisition Of Assets Producing Metal Grade TiCl4
Related Party Transaction [Line Items]
Notes receivable from related party											$ 36
Affiliated Entity | Advanced Metal Industries Cluster Company Limited | TiC14 Product Sales
Related Party Transaction [Line Items]
Revenue from related party							5
Affiliated Entity | Advanced Metal Industries Cluster Company Limited | Feedstock Purchase
Related Party Transaction [Line Items]
Purchases from related party								11
Affiliated Entity | AMIC | Option Agreement, Amounts To Be Reimbursed For Capital Expenditures And Operational Expenses
Related Party Transaction [Line Items]
Due from related parties												$ 125
Payments to fund long-term loans to related parties							125	89
Affiliated Entity | AMIC | Amended Technical Services Agreement, Monthly Management Fee
Related Party Transaction [Line Items]
Revenue from related party	$ 1
Other income (expense), net						2	5
Prepaid and other assets						1	1
Affiliated Entity | AMIC | Transition Services Agreement
Related Party Transaction [Line Items]
Due to related party						2	2
Due from related parties						1	1
Affiliated Entity | AMIC | Receivable From TiCl4 Product Sales
Related Party Transaction [Line Items]
Due from related parties, current						7	7	5
Affiliated Entity | Slagger | Option Agreement, Amounts To Be Reimbursed For Capital Expenditures And Operational Expenses
Related Party Transaction [Line Items]
Payments to fund long-term loans to related parties						12	36
Affiliated Entity | Tasnee, Cristal And Advanced Metal Industries Cluster | Transition Services Agreement
Related Party Transaction [Line Items]
Selling, general and administrative expenses to related party transaction							2	4
Affiliated Entity | Tasnee | Pre-Paid Insurance Paid On Behalf Of Related Party
Related Party Transaction [Line Items]
Amount of transaction with related party							1	1
Affiliated Entity | Tasnee | Stamp Duty Tax
Related Party Transaction [Line Items]
Selling, general and administrative expenses to related party transaction							3
Affiliated Entity | Tasnee | Pre-Acquisition Activity
Related Party Transaction [Line Items]
Accounts receivable from related party						9	9	14
Related party payables						3	3	$ 7
Affiliated Entity | Advanced Metal Industries Cluster And Toho Titanium Metal Co. Ltd (ATTM) | Purchase Of Chlorine Gas
Related Party Transaction [Line Items]
Due to related parties, current						3	3
Affiliated Entity | Exxaro Resources Limited | Tronox Holdings PLC | Exxaro Mineral Sands Transaction Completion Agreement
Related Party Transaction [Line Items]
Number of shares sold in related party transaction (in shares) | shares		14,000,000
Consideration received for shares sold in related party transaction		$ 200
Price per share of shares sold in related party transaction (in dollars per share) | $ / shares		$ 14.3185
Fees for shares sold in related party transaction		$ 1
Percentage of discount per share sold in related party transaction		5.00%
Number of days threshold in determination of weighted average share price | day		10
Affiliated Entity | Advanced Metal Industries Cluster And Toho Titanium Metal Co. Ltd (ATTM) | Acquisition Of Assets Producing Metal Grade TiCl4
Related Party Transaction [Line Items]
Ownership percentage											65.00%
AMIC
Related Party Transaction [Line Items]
Revenue from related party						$ 6	$ 25

Segment Information, Net Sales

Segment Information, Net Sales to External Customers, by Product Segment (Details)	12 Months Ended
	Dec. 31, 2020segment	Dec. 31, 2020discontinuedOperation	Dec. 31, 2020customer	Dec. 31, 2020	Dec. 31, 2019customer	Dec. 31, 2018customer
Segment Information [Abstract]
Number of operating segments	1	1
Sales Revenue, Net | Customer Concentration Risk | 10 Largest Third-party TiO2 Customers
Segment Information [Abstract]
Number of largest customers representing specified percentage of net sales			10		10	10
Concentration percentage				32.00%	31.00%	37.00%

Segment Information, Net Sale t

Segment Information, Net Sale to External Customers, by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net Sale to External Customers, by Geographic Region [Abstract]
Net sales	$ 783	$ 675	$ 578	$ 722	$ 693	$ 768	$ 791	$ 390	$ 2,758	$ 2,642	$ 1,819
U.S. operations
Net Sale to External Customers, by Geographic Region [Abstract]
Net sales									653	676	685
United Kingdom
Net Sale to External Customers, by Geographic Region [Abstract]
Net sales									301	218	0
Australia
Net Sale to External Customers, by Geographic Region [Abstract]
Net sales									637	674	444
South Africa
Net Sale to External Customers, by Geographic Region [Abstract]
Net sales									330	370	444
Other - international
Net Sale to External Customers, by Geographic Region [Abstract]
Net sales									$ 837	$ 704	$ 246

Segment Information, Schedule o

Segment Information, Schedule of Property, Plant and Equipment, Net and Mineral Leaseholds, Net, by Geographic Region (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment, Net and Mineral Leaseholds, Net, by Geographic Region [Abstract]
Property plant and equipment and mineral leaseholds, net	$ 2,643	$ 2,715
U.S. operations
Property, Plant and Equipment, Net and Mineral Leaseholds, Net, by Geographic Region [Abstract]
Property plant and equipment and mineral leaseholds, net	261	255
United Kingdom
Property, Plant and Equipment, Net and Mineral Leaseholds, Net, by Geographic Region [Abstract]
Property plant and equipment and mineral leaseholds, net	101	93
Saudi Arabia
Property, Plant and Equipment, Net and Mineral Leaseholds, Net, by Geographic Region [Abstract]
Property plant and equipment and mineral leaseholds, net	262	215
South Africa
Property, Plant and Equipment, Net and Mineral Leaseholds, Net, by Geographic Region [Abstract]
Property plant and equipment and mineral leaseholds, net	768	799
Australia
Property, Plant and Equipment, Net and Mineral Leaseholds, Net, by Geographic Region [Abstract]
Property plant and equipment and mineral leaseholds, net	995	1,109
Other - international
Property, Plant and Equipment, Net and Mineral Leaseholds, Net, by Geographic Region [Abstract]
Property plant and equipment and mineral leaseholds, net	$ 256	$ 244

Quarterly Results of Operatio_3

Quarterly Results of Operations (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Data [Abstract]
Net sales	$ 783	$ 675	$ 578	$ 722	$ 693	$ 768	$ 791	$ 390	$ 2,758	$ 2,642	$ 1,819
Cost of goods sold	605	536	449	547	545	635	672	307	2,137	2,159	1,321
Contract loss					0	0	19	0	0	19	0
Gross profit	178	139	129	175	148	133	100	83	621	464	498
Net income (loss) from continuing operations	57	902	(4)	40	(5)	(12)	(55)	(30)	995	(102)	30
Net income from discontinued operations, net of tax	0	0	0	0	0	6	(1)	0	0	5	0
Net income (loss)	57	902	(4)	40	(5)	(6)	(56)	(30)	995	(97)	30
Net income attributable to noncontrolling interest	12	6	0	8	(5)	7	6	4	26	12	37
Net (loss) income attributable to Tronox Holdings plc	$ 45	$ 896	$ (4)	$ 32	$ 0	$ (13)	$ (62)	$ (34)	$ 969	$ (109)	$ (7)
Net income (loss) per share, basic (in dollars per share)	$ 0.31	$ 6.24	$ (0.03)	$ 0.23					$ 6.76	$ (0.81)	$ (0.06)
Net income (loss) per share, diluted (in dollars per share)	$ 0.31	$ 6.18	$ (0.03)	$ 0.22					$ 6.69	$ (0.81)	$ (0.06)
Loss from continuing operations per share, basic and diluted (in dollars per share)					$ 0	$ (0.13)	$ (0.41)	$ (0.27)
Income from discontinued operations per share, basic and diluted (in dollars per share)					$ 0	$ 0.04	$ 0	$ 0
Out of Period Adjustments
Quarterly Financial Data [Abstract]
Net income from discontinued operations, net of tax						$ 7