DEBT (Details) - USD ($) $ in Millions								1 Months Ended	3 Months Ended
DEBT (Details) - USD ($) $ in Millions	May 16, 2024	May 15, 2024	Mar. 01, 2024	Aug. 12, 2019	Jun. 26, 2017	Aug. 08, 2016	Nov. 12, 2014	May 31, 2024	Dec. 31, 2024	Mar. 31, 2018	May 22, 2024	May 13, 2024	May 01, 2024	Apr. 15, 2024	Feb. 29, 2024	Dec. 31, 2023	May 12, 2020	Jan. 25, 2018	Oct. 31, 2006
Long-Term Debt [Line Items]
Other									$ 0							$ 1
Short-term Debt [Abstract]
Short-term debt									$ 1							$ 1
Short term debt, weighted average interest rate									3.80%							5.10%
Long-term debt									$ 5,154							$ 3,046
Notes payable, fair value									100.00%							100.00%
Notes Payable, Fair Value Disclosure, Par Value									(100.00%)							(100.00%)
Masonite International Corporation ("Masonite")
Long-Term Debt [Line Items]
Repayments		$ 216
4.200% senior notes, net of discount and financing fees, due 2024
Long-Term Debt [Line Items]
Fixed interest, percentage rate									4.20%
Face amount							$ 400
Repayments									$ 400
Short-term Debt [Abstract]
Long-term debt									$ 0							$ 399
Notes payable, fair value									0.00%							99.00%
Notes Payable, Fair Value Disclosure, Par Value									0.00%							(99.00%)
3.875% senior notes, net of discount and financing fees, due 2030
Long-Term Debt [Line Items]
Face amount																	$ 300
3.950% senior notes, net of discount and financing fees, due 2029
Long-Term Debt [Line Items]
Fixed interest, percentage rate									3.95%
Face amount				$ 450
Short-term Debt [Abstract]
Long-term debt									$ 447							$ 447
Notes payable, fair value									95.00%							95.00%
Notes Payable, Fair Value Disclosure, Par Value									(95.00%)							(95.00%)
7.000% senior notes, net of discount and financing fees, due 2036
Long-Term Debt [Line Items]
Fixed interest, percentage rate									7.00%
Face amount																			$ 550
Repayments				34	$ 140
Short-term Debt [Abstract]
Long-term debt									$ 369							$ 369
Notes payable, fair value									112.00%							116.00%
Notes Payable, Fair Value Disclosure, Par Value									(112.00%)							(116.00%)
4.400% senior notes, net of discount and financing fees, due 2048
Long-Term Debt [Line Items]
Fixed interest, percentage rate									4.40%
Face amount																		$ 400
Short-term Debt [Abstract]
Long-term debt									$ 391							$ 391
Notes payable, fair value									80.00%							87.00%
Notes Payable, Fair Value Disclosure, Par Value									(80.00%)							(87.00%)
4.300% senior notes, net of discount and financing fees, due 2047
Long-Term Debt [Line Items]
Fixed interest, percentage rate									4.30%
Face amount					600
Short-term Debt [Abstract]
Long-term debt									$ 589							$ 589
Notes payable, fair value									80.00%							88.00%
Notes Payable, Fair Value Disclosure, Par Value									(80.00%)							(88.00%)
3.400% senior notes, net of discount and financing fees, due 2026
Long-Term Debt [Line Items]
Fixed interest, percentage rate									3.40%
Face amount						$ 400
Short-term Debt [Abstract]
Long-term debt									$ 399							$ 398
Notes payable, fair value									98.00%							96.00%
Notes Payable, Fair Value Disclosure, Par Value									(98.00%)							(96.00%)
Senior Notes Due 2016
Long-Term Debt [Line Items]
Repayments						$ 158	242
9.00% senior notes, net of discount and financing fees, due 2019
Long-Term Debt [Line Items]
Repayments					$ 144		$ 105
Senior Notes Due 2022 [Member]
Long-Term Debt [Line Items]
Repayments				$ 416
Senior Revolving Credit Facility B
Long-Term Debt [Line Items]
Proceeds from issuance of debt										$ 600
Borrowing capacity under credit facility			$ 1,000						$ 1,000						$ 800
Short-term Debt [Abstract]
Outstanding borrowings									0
Letter of Credit Under Receivables Purchase Agreement
Long-Term Debt [Line Items]
Face amount			300												$ 280
Borrowing capacity under credit facility									300
Short-term Debt [Abstract]
Proceeds from Lines of Credit		$ 295
Outstanding borrowings									$ 0
Senior Notes Due 2027
Long-Term Debt [Line Items]
Fixed interest, percentage rate								5.50%	5.50%
Face amount								$ 500
Short-term Debt [Abstract]
Long-term debt									$ 497
Notes payable, fair value									102.00%
Notes Payable, Fair Value Disclosure, Par Value									(102.00%)
Debt Issuance Costs, Gross								$ 4
Senior Notes Due 2034
Long-Term Debt [Line Items]
Fixed interest, percentage rate								5.70%	5.70%
Face amount								$ 800
Short-term Debt [Abstract]
Long-term debt									$ 790
Notes payable, fair value									102.00%
Notes Payable, Fair Value Disclosure, Par Value									(102.00%)
Debt Issuance Costs, Gross								$ 11
Senior Notes Due 2054
Long-Term Debt [Line Items]
Fixed interest, percentage rate								5.95%	5.95%
Face amount								$ 700
Short-term Debt [Abstract]
Long-term debt									$ 683
Notes payable, fair value									99.00%
Notes Payable, Fair Value Disclosure, Par Value									(99.00%)
Debt Issuance Costs, Gross								17
Senior Notes Due 2030 ("Masonite 2030 Notes") \| Masonite International Corporation ("Masonite")
Long-Term Debt [Line Items]
Fixed interest, percentage rate													3.50%
Short-term Debt [Abstract]
Long-term debt													$ 2
Business Acquisition, Percentage Of Long-Term Debt Tendered											99.51%
Senior Notes Due 2030 ("Owens Corning 2030 Notes") \| Masonite International Corporation ("Masonite")
Long-Term Debt [Line Items]
Fixed interest, percentage rate													3.50%
Face amount											$ 373
Senior Notes Due 2028 ("Masonite 2028 Notes")
Long-Term Debt [Line Items]
Fixed interest, percentage rate									5.375%
Short-term Debt [Abstract]
Long-term debt									$ 29
Notes payable, fair value									99.00%
Notes Payable, Fair Value Disclosure, Par Value									(99.00%)
Senior Notes Due 2028 ("Masonite 2028 Notes") \| Masonite International Corporation ("Masonite")
Long-Term Debt [Line Items]
Fixed interest, percentage rate														5.375%
Face amount														$ 501
Repayments	$ 480
Short-term Debt [Abstract]
Long-term debt														$ 29
Business Acquisition, Percentage Of Long-Term Debt Tendered												94.25%
Interest Expense, Long-Term Debt	7
Payment Of Premium On Long-Term Debt	$ 1
364-Day Credit Facility
Long-Term Debt [Line Items]
Borrowing capacity under credit facility			$ 3,000
Short-term Debt [Abstract]
Term (in years)			364 days
364-Day Credit Facility \| Masonite International Corporation ("Masonite")
Short-term Debt [Abstract]
Proceeds from Lines of Credit								2,800
Financing Costs, Debt								$ 16

Owens Corning 10-K