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Fair Value Measurements Fair Value (Details) (USD $)
In Millions
9 Months Ended 3 Months Ended
Jul. 31, 2011
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 1 [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 1 [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 1 [Member]
US Treasury Bill Securities [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 1 [Member]
US Treasury Bill Securities [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 1 [Member]
Other US and Non-US Government Bonds [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 1 [Member]
Other US and Non-US Government Bonds [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 1 [Member]
Other [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 1 [Member]
Other [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 1 [Member]
Commodity Contract [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 1 [Member]
Commodity Contract [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 1 [Member]
Foreign Currency Contract [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 1 [Member]
Foreign Currency Contract [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 2 [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 2 [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 2 [Member]
US Treasury Bill Securities [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 2 [Member]
US Treasury Bill Securities [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 2 [Member]
Other US and Non-US Government Bonds [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 2 [Member]
Other US and Non-US Government Bonds [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 2 [Member]
Other [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 2 [Member]
Other [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 2 [Member]
Commodity Contract [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 2 [Member]
Commodity Contract [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 2 [Member]
Foreign Currency Contract [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 2 [Member]
Foreign Currency Contract [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 3 [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 3 [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 3 [Member]
US Treasury Bill Securities [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 3 [Member]
US Treasury Bill Securities [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 3 [Member]
Other US and Non-US Government Bonds [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 3 [Member]
Other US and Non-US Government Bonds [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 3 [Member]
Other [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 3 [Member]
Other [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 3 [Member]
Commodity Contract [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 3 [Member]
Commodity Contract [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Level 3 [Member]
Foreign Currency Contract [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Level 3 [Member]
Foreign Currency Contract [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
US Treasury Bill Securities [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
US Treasury Bill Securities [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Other US and Non-US Government Bonds [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Other US and Non-US Government Bonds [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Other [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Other [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Commodity Contract [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Commodity Contract [Member]
Jul. 31, 2011
Fair Value, Measurements, Recurring [Member]
Foreign Currency Contract [Member]
Oct. 31, 2010
Fair Value, Measurements, Recurring [Member]
Foreign Currency Contract [Member]
Jul. 31, 2011
Fair Value, Measurements, Nonrecurring [Member]
Oct. 31, 2010
Fair Value, Measurements, Nonrecurring [Member]
Jul. 31, 2011
Fair Value, Measurements, Nonrecurring [Member]
Level 2 [Member]
Oct. 31, 2010
Fair Value, Measurements, Nonrecurring [Member]
Level 2 [Member]
Jul. 31, 2011
Fair Value, Measurements, Nonrecurring [Member]
Level 3 [Member]
Apr. 30, 2011
Fair Value, Measurements, Nonrecurring [Member]
Level 3 [Member]
Carrying Value [Member]
Jul. 31, 2011
Fair Value, Measurements, Nonrecurring [Member]
Carrying Value [Member]
Oct. 31, 2010
Fair Value, Measurements, Nonrecurring [Member]
Carrying Value [Member]
Assets                                                                                                                  
Available-for-sale securities           $ 329 $ 159 $ 271 $ 407 $ 20 $ 20             $ 0 $ 0 $ 0 $ 0 $ 0 $ 0             $ 0 $ 0 $ 0 $ 0 $ 0 $ 0         $ 329 $ 159 $ 271 $ 407 $ 20 $ 20                        
Derivative financial instruments:                                                                                                                  
Asset derivatives                       0 0 0 0                 1 0 0 8                 3 2 0 0             4 2 0 8                
Retained interests     53   0                       0                       53                                                        
Property and equipment                                                                                                           54 64    
Intangible assets                                                                                                           30 84    
Total assets   624 649 620 586                     1 8                     3 55                                                 84      
Derivative financial instruments:                                                                                                                  
Liability derivatives                       0 0                     1 4                     1 0                 2 4                    
Total liabilities 0 2 4   0                     1 4                     1 0                                                        
Finance receivables                                                                                                   9 27 9 [1] 27 [1]     22 50
Specific loss reserves on impaired finance receivables 13                                                                                                 13 23            
Cash equivalents, restricted cash equivalents, and marketable securities, maturity period 90 days                                                                                                                
Impairment of Long-Lived Assets Held-for-use                                                                                                           10      
Impairment of Intangible Assets (Excluding Goodwill)                                                                                                           $ 54      
[1] Certain impaired finance receivables are measured at fair value on a nonrecurring basis. An impairment charge is recorded for the amount by which the carrying value of the receivables exceeds the fair value of the underlying collateral, net of remarketing costs. As of July 31, 2011, impaired receivables with a carrying amount of $22 million had specific loss reserves of $13 million and a fair value of $9 million. As of October 31, 2010, impaired receivables with a carrying amount of $50 million had specific loss reserves of $23 million and a fair value of $27 million. Fair values of the underlying collateral are determined by reference to dealer vehicle value publications adjusted for certain market factors.