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Environmental Matters, Litigation and Product Warranties - Warranty Accrual Rollforward (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Beginning Balance January 1, $ 23 $ 26
Accruals related to product warranties 6 6
Reductions for payments made (6) (7)
Ending Balance June 30, $ 23 $ 25