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Intangible Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Intangible assets, net of accumulated amortization [Abstract]
Gross Cost	$ 465		$ 457
Accumulated Amortization	(264)		(256)
Net Carrying Amount	201		201
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of 2021	24
2022	33
2023	33
2024	36
2025	33
Thereafter	42
Selling, general and administrative expenses
Amortization expense related to intangible assets [Abstract]
Amortization expense	8	$ 9
Customer relationships
Intangible assets, net of accumulated amortization [Abstract]
Gross Cost	291		291
Accumulated Amortization	(197)		(193)
Net Carrying Amount	94		98
TiO2 technology
Intangible assets, net of accumulated amortization [Abstract]
Gross Cost	93		93
Accumulated Amortization	(26)		(24)
Net Carrying Amount	67		69
Internal-use software and other
Intangible assets, net of accumulated amortization [Abstract]
Gross Cost	81		73
Accumulated Amortization	(41)		(39)
Net Carrying Amount	40		34
Capitalized Software
Intangible assets, net of accumulated amortization [Abstract]
Net Carrying Amount	$ 29		$ 19

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- Definition

Finite-Lived Intangible Assets, Amortization Expense, After Year Four

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in remainder of current fiscal year.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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