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Accounts Payable
3 Months Ended
Mar. 31, 2012
Accounts Payable [Abstract]  
Accounts Payable
Note 7.
Accounts Payable
Accounts payable at March 31, 2012 and December 31, 2011 include liabilities in the amounts of $102 million and $121 million, respectively, for checks issued in excess of associated bank balances but not yet presented for collection.