Annual report pursuant to Section 13 and 15(d)

Aging Analysis of Finance Receivables (Detail)

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Aging Analysis of Finance Receivables (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due $ 1  
60-90 Days Past Due 5  
Greater than 90 Days Past Due 46  
Current 299  
Total Finance Receivables 351 511
Commercial term loans, U.S. Government guaranteed
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due 1  
Greater than 90 Days Past Due 30  
Current 31  
Total Finance Receivables 62  
Commercial term loans, Other unguaranteed
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
60-90 Days Past Due 5  
Greater than 90 Days Past Due 15  
Current 115  
Total Finance Receivables 135  
Commercial term loans, Other financing receivables
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days Past Due 1  
Current 153  
Total Finance Receivables $ 154