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Warranty Obligations - Changes in Warranty Liabilities (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Product Warranties Disclosures [Abstract]        
Balance, beginning of period $ 59 $ 77 $ 66 $ 72
Amounts accrued for current period sales 4 3 17 18
Adjustments of prior accrual estimates    1    4
Settlements of warranty claims (7) (9) (26) (22)
Currency impact    1 (1) 1
Balance, end of period $ 56 $ 73 $ 56 $ 73