CONSOLIDATED STATEMENTS OF EARNINGS - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Income Statement [Abstract]        
NET SALES $ 1,461 $ 1,382 $ 4,082 $ 4,015
COST OF SALES 1,121 1,131 3,225 3,282
Gross margin 340 251 857 733
OPERATING EXPENSES        
Marketing and administrative expenses 130 110 389 372
Science and technology expenses 18 18 53 57
Charges related to cost reduction actions (5) 19 (5) 31
Other expenses (income), net 1 (3) 10 (15)
Total operating expenses 144 144 447 445
EARNINGS BEFORE INTEREST AND TAXES 196 107 410 288
Interest expense, net 28 28 80 86
Gains (Losses) on Extinguishment of Debt 0 0 (5) 0
EARNINGS BEFORE TAXES 168 79 335 202
Less: Income tax expense 55 27 112 9
Equity in net earnings of affiliates 0 0 1 1
NET EARNINGS 113 52 224 194
Less: Net earnings attributable to noncontrolling interests 1 0 3 1
NET EARNINGS ATTRIBUTABLE TO OWENS CORNING $ 112 $ 52 $ 221 $ 193
EARNINGS PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING COMMON STOCKHOLDERS        
Basic (in dollars per share) $ 0.96 $ 0.44 $ 1.88 $ 1.64
Diluted (in dollars per share) 0.95 0.44 1.87 1.63
Dividend (in dollars per share) $ 0.17 $ 0.16 $ 0.51 $ 0.48
WEIGHTED AVERAGE COMMON SHARES        
Basic (in shares) 117.2 117.4 117.5 117.5
Diluted (in shares) 118.3 118.1 118.4 118.3