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Financial Information by Segment - Schedule of Advanced Technologies Business Segment (Detail) (Operating Segments [Member], Advanced Technologies [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2014
Mar. 31, 2013
Segment Reporting Information [Line Items]        
Net sales $ 48 $ 39 $ 112 $ 76
Inkjet Colorants [Member]
       
Segment Reporting Information [Line Items]        
Net sales 14 12 29 28
Aerogel [Member]
       
Segment Reporting Information [Line Items]        
Net sales 1 3 6 8
Elastomer Composites [Member]
       
Segment Reporting Information [Line Items]        
Net sales 8 4 24 12
Specialty Fluids [Member]
       
Segment Reporting Information [Line Items]        
Net sales $ 25 $ 20 $ 53 $ 28