v3.26.1
SEGMENT INFORMATION - Net Sales by Reportable Segments (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disaggregation of Revenue [Line Items]    
Net sales $ 2,265 $ 2,530
Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 2,302 2,569
Intersegment Eliminations    
Disaggregation of Revenue [Line Items]    
Net sales (37) (39)
Europe    
Disaggregation of Revenue [Line Items]    
Net sales 295 268
Europe | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 296 270
Europe | Intersegment Eliminations    
Disaggregation of Revenue [Line Items]    
Net sales (1) (2)
Asia Pacific    
Disaggregation of Revenue [Line Items]    
Net sales 2 29
Asia Pacific | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 2 29
Asia Pacific | Intersegment Eliminations    
Disaggregation of Revenue [Line Items]    
Net sales 0 0
Rest of World    
Disaggregation of Revenue [Line Items]    
Net sales 7 9
Rest of World | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 7 9
Rest of World | Intersegment Eliminations    
Disaggregation of Revenue [Line Items]    
Net sales 0 0
North America    
Disaggregation of Revenue [Line Items]    
Net sales 1,961 2,224
North America | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 1,997 2,261
North America | Intersegment Eliminations    
Disaggregation of Revenue [Line Items]    
Net sales (36) (37)
Insulation | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 867 909
Insulation | Europe | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 185 166
Insulation | Asia Pacific | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 0 25
Insulation | Rest of World | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 4 4
Insulation | North America | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 678 714
Roofing | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 960 1,120
Roofing | Europe | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 52 48
Roofing | Asia Pacific | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 2 4
Roofing | Rest of World | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 0 0
Roofing | North America | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 906 1,068
Doors | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 475 540
Doors | Europe | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 59 56
Doors | Asia Pacific | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 0 0
Doors | Rest of World | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 3 5
Doors | North America | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 413 479
Residential | North America    
Disaggregation of Revenue [Line Items]    
Net sales 1,528 1,794
Residential | North America | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 1,562 1,829
Residential | North America | Intersegment Eliminations    
Disaggregation of Revenue [Line Items]    
Net sales (34) (35)
Residential | Insulation | North America | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 346 382
Residential | Roofing | North America | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 803 968
Residential | Doors | North America | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 413 479
Commercial and Industrial Sector | North America    
Disaggregation of Revenue [Line Items]    
Net sales 433 430
Commercial and Industrial Sector | North America | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 435 432
Commercial and Industrial Sector | North America | Intersegment Eliminations    
Disaggregation of Revenue [Line Items]    
Net sales (2) (2)
Commercial and Industrial Sector | Insulation | North America | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 332 332
Commercial and Industrial Sector | Roofing | North America | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales 103 100
Commercial and Industrial Sector | Doors | North America | Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales $ 0 $ 0