2.4.0.83060 - Disclosure - Commercial Paper and Other Short-Term Borrowings (Tables)truefalsefalse1false falsefalseD2013Q2YTDhttp://www.sec.gov/CIK0001011659duration2013-01-01T00:00:002013-06-30T00:00:001true 1us-gaap_DebtDisclosureAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Debt Disclosure [Abstract]2false 2us-gaap_ScheduleOfShortTermDebtTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-size:10.0pt;font-family:Times New Roman;FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;">   <div style="POSITION: relative; PADDING-BOTTOM: 0pt; PADDING-LEFT: 0pt; WIDTH: 88.45%; PADDING-RIGHT: 0pt; MARGIN-LEFT: 10%; PADDING-TOP: 0pt;">   <div align="center"> <table style="text-align:left;TEXT-ALIGN: left;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="FONT-FAMILY: arial;" align="left"></td> <td style="FONT-FAMILY: arial;" width="12"></td> <td style="FONT-FAMILY: arial;" width="8" align="right"></td> <td style="FONT-FAMILY: arial;" width="46"></td> <td style="FONT-FAMILY: arial;" width="12"></td> <td style="FONT-FAMILY: arial;" width="8" align="right"></td> <td style="FONT-FAMILY: arial;" width="67"></td> <td style="FONT-FAMILY: arial;" width="12"></td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;" valign="bottom"> <th style="BORDER-BOTTOM: #000000 1pt solid; FONT-FAMILY: arial;" align="left">(Dollars in millions)</th> <th style="FONT-FAMILY: arial;"> </th> <th style="BORDER-BOTTOM: #000000 1pt solid; FONT-FAMILY: arial;" colspan="2" align="center">June 30, 2013</th> <th style="FONT-FAMILY: arial;"> </th> <th style="BORDER-BOTTOM: #000000 1pt solid; FONT-FAMILY: arial;" colspan="2" align="center">December 31, 2012</th> <th style="FONT-FAMILY: arial;"> </th></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;" valign="bottom" bgcolor="#CCEEFF"> <td style="FONT-FAMILY: arial;"> Federal funds purchased and securities sold under repurchase agreements with weighted average interest rates of 0.07% and 0.96% at June 30, 2013 and December 31, 2012, respectively</td> <td style="FONT-FAMILY: arial;"> </td> <td style="FONT-FAMILY: arial;" align="right">$</td> <td style="FONT-FAMILY: arial;" align="right">137</td> <td style="FONT-FAMILY: arial;"> </td> <td style="FONT-FAMILY: arial;" align="right">$</td> <td style="FONT-FAMILY: arial;" align="right">123</td> <td style="FONT-FAMILY: arial;"> </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;" valign="bottom" bgcolor="white"> <td style="FONT-FAMILY: arial;"> Commercial paper, with weighted average interest rates of 0.17% and 0.20% at June 30, 2013 and December 31, 2012, respectively</td> <td style="FONT-FAMILY: arial;"> </td> <td style="FONT-FAMILY: arial;"> </td> <td style="FONT-FAMILY: arial;" align="right">3,655</td> <td style="FONT-FAMILY: arial;"> </td> <td style="FONT-FAMILY: arial;"> </td> <td style="FONT-FAMILY: arial;" align="right">1,240</td> <td style="FONT-FAMILY: arial;"> </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; FONT-SIZE: 1.5pt; PADDING-TOP: 0px;" valign="top"> <td style="FONT-FAMILY: arial;" valign="bottom"> </td> <td style="FONT-FAMILY: arial;" valign="bottom"> </td> <td style="BORDER-BOTTOM: #000000 1pt solid; FONT-FAMILY: arial;" valign="bottom" colspan="2" align="right"> </td> <td style="FONT-FAMILY: arial;" valign="bottom"> </td> <td style="BORDER-BOTTOM: #000000 1pt solid; FONT-FAMILY: arial;" valign="bottom" colspan="2" align="right"> </td> <td style="FONT-FAMILY: arial;" valign="bottom"> </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;" valign="bottom" bgcolor="#CCEEFF"> <td style="FONT-FAMILY: arial;"> Total commercial paper and other short-term borrowings</td> <td style="FONT-FAMILY: arial;"> </td> <td style="FONT-FAMILY: arial;" align="right">$</td> <td style="FONT-FAMILY: arial;" align="right">3,792</td> <td style="FONT-FAMILY: arial;"> </td> <td style="FONT-FAMILY: arial;" align="right">$</td> <td style="FONT-FAMILY: arial;" align="right">1,363</td> <td style="FONT-FAMILY: arial;"> </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; FONT-SIZE: 1.5pt; PADDING-TOP: 0px;" valign="top"> <td style="FONT-FAMILY: arial;" valign="bottom"> </td> <td style="FONT-FAMILY: arial;" valign="bottom"> </td> <td style="BORDER-BOTTOM: #000000 2.25pt double; FONT-FAMILY: arial;" valign="bottom" colspan="2" align="right"> </td> <td style="FONT-FAMILY: arial;" valign="bottom"> </td> <td style="BORDER-BOTTOM: #000000 2.25pt double; FONT-FAMILY: arial;" valign="bottom" colspan="2" align="right"> </td> <td style="FONT-FAMILY: arial;" valign="bottom"> </td></tr></table></div> </div></div>falsefalsefalsenonnum:textBlockItemTypenaTabular disclosure of short-term debt arrangements (having initial terms of repayment within one year or the normal operating cycle, if longer) including: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 false0Summary of Commercial Paper and Other Short-Term BorrowingsfalseCommercial Paper and Other Short-Term Borrowings (Tables)UnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.unionbank.com/role/Role_NotesToFinancialStatementsShortTermDebtTextBlockTables12