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Warranty Obligations - Changes in Warranty Liabilities (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]        
Balance, beginning of period $ 46 $ 56 $ 47 $ 54
Amounts accrued for current period sales 7 5 14 9
Adjustments of prior estimates 2 7 4 11
Settlements of warranty claims (8) $ (9) (16) $ (15)
Currency impact 1   (1)  
Balance, end of period $ 48 $ 59 $ 48 $ 59