Acquisitions Business Acquisition (Details) - USD ($) $ in Millions					12 Months Ended
	Feb. 01, 2022	Oct. 01, 2021	Sep. 10, 2021	Aug. 19, 2021	Dec. 31, 2021	Dec. 31, 2020
Boral Target Companies
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		$ 5
Business Combination, Acquired Receivable, Fair Value		119
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory		156
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets		3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		489
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease, Right-of-Use-Asset		87
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		952
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets		18
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		1,829
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable		46
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accrued Liabilities		103
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent		244
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Operating Lease, Liability		73
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities		2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		468
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		1,361
Goodwill, Acquired During Period		771
Business Combination, Consideration Transferred		2,132
Customer Relationships, Gross		645
Trademarks, Gross		200
Payments to Acquire Businesses, Gross		2,150
Net working capital adjustment		(2)
Business Combination, Consideration Transferred, Liabilities Incurred		(16)
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual					$ 12,653	$ 8,553
Business Acquisition, Pro Forma Net Income (Loss)					2,035	268
Dimex LLC
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			$ 69
Goodwill, Acquired During Period		$ 66
Business Combination, Consideration Transferred			172
LASCO Fittings, Inc.
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				$ 77
Goodwill, Acquired During Period				106
Business Combination, Consideration Transferred				277
Hexion Epoxy Business | Subsequent Event
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 1,200
Customer relationships
Business Acquisition [Line Items]
Customer Relationships, Gross					$ 1,581	$ 845
Customer relationships | Boral Target Companies | Minimum
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		12 years
Customer relationships | Boral Target Companies | Maximum
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		22 years
Customer relationships | Dimex LLC
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			$ 45
Customer relationships | LASCO Fittings, Inc.
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				$ 50
Technology-Based Intangible Assets | Boral Target Companies
Business Acquisition [Line Items]
Licenses and intellectual property, Gross		$ 107
Technology-Based Intangible Assets | Boral Target Companies | Minimum
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		20 years
Technology-Based Intangible Assets | Boral Target Companies | Maximum
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		22 years
Trade Names | Boral Target Companies | Minimum
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		21 years
Trade Names | Boral Target Companies | Maximum
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		22 years