Quarterly report pursuant to Section 13 or 15(d)

Loans, Notes and Mortgages - Allowance for Loan Losses (Details)

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Loans, Notes and Mortgages - Allowance for Loan Losses (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Allowance for Loan and Lease Losses [Roll Forward]    
Allowance for loan losses, at beginning of period $ 57 $ 72
Provision for loan losses (16) 3
Charge-offs (2) (3)
Recoveries 18 3
Net charge-offs 16 0
Allowance for loan losses, at end of period $ 57 $ 75