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Accounts Payable
3 Months Ended
Mar. 31, 2013
Accounts Payable [Abstract]  
Accounts Payable
Note 8.
Accounts Payable
Accounts payable at March 31, 2013 and December 31, 2012 include liabilities in the amounts of $79 million and $117 million, respectively, for checks issued in excess of associated bank balances but not yet presented for collection.