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This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' 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and Commissions, Credit Cards (Deprecated 2018-01-31)","description":"Income earned from credit card services including late, over limit, and annual fees. This item excludes interest income earned on credit card balances and transactions.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":58000000,"accn":"0000028412-13-000034","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-19","frame":"CY2010"},{"start":"2011-01-01","end":"2011-09-30","val":47000000,"accn":"0000028412-12-000097","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-10-30"},{"start":"2011-07-01","end":"2011-09-30","val":17000000,"accn":"0000028412-12-000097","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-10-30","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":58000000,"accn":"0000028412-13-000034","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-19","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":11000000,"accn":"0000028412-13-000058","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-29","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":23000000,"accn":"0000028412-13-000093","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-07-29"},{"start":"2012-04-01","end":"2012-06-30","val":12000000,"accn":"0000028412-13-000093","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-07-29","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":48000000,"accn":"0000028412-13-000107","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-29"},{"start":"2012-01-01","end":"2012-09-30","val":35000000,"accn":"0000028412-12-000097","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-10-30"},{"start":"2012-07-01","end":"2012-09-30","val":16000000,"accn":"0000028412-13-000107","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-29","frame":"CY2012Q3"},{"start":"2012-07-01","end":"2012-09-30","val":12000000,"accn":"0000028412-12-000097","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-10-30"},{"start":"2012-01-01","end":"2012-12-31","val":47000000,"accn":"0000028412-13-000034","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-19","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":12000000,"accn":"0000028412-13-000058","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-29","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":25000000,"accn":"0000028412-13-000093","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-07-29"},{"start":"2013-04-01","end":"2013-06-30","val":13000000,"accn":"0000028412-13-000093","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-07-29","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":55000000,"accn":"0000028412-13-000107","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-29"},{"start":"2013-07-01","end":"2013-09-30","val":20000000,"accn":"0000028412-13-000107","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-29","frame":"CY2013Q3"}]}},"FeesAndCommissionsDepositorAccounts":{"label":"Fees and Commissions, Depositor Accounts (Deprecated 2018-01-31)","description":"Includes amounts charged depositors for: (1) maintenance of their accounts (maintenance charges); (2) failure to maintain specified minimum balances on account; (3) exceeding the number of checks or transactions allowed to be processed in a given period; (4) checks drawn on no minimum balance deposit accounts; (5) withdrawals from nontransaction deposit accounts; (6) closing savings accounts before a specified minimum period of time has elapsed; (7) accounts which have remained inactive for extended periods of time or which have become dormant; (8) use of automated teller machines or remote service units; (9) checks drawn against insufficient funds that the bank assesses regardless of whether it decides to pay, return or hold the check; (10) issuing stop payment orders; (11) certifying checks; and (12) accumulating or disbursing funds deposited in IRAs or Keogh Plan accounts when not handled by the bank's trust department. 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