2.2.0.25truefalse40702 - Disclosure - Deposits (Scheduled maturities of U.S. time deposits) (Details)truefalseIn Millionsfalse1falsefalseUSDtruefalse{stt_TimeDepositsDomesticAxis} : U.S. Time Deposits [Member]
12/31/2010
USD ($)
$As_Of_12_31_20109http://www.sec.gov/CIK0000093751instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseU.S. Time Deposits [Member]stt_TimeDepositsDomesticAxisxbrldihttp://xbrl.org/2006/xbrldistt_USTimeDepositsMemberstt_TimeDepositsDomesticAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false0us-gaap_ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsOrLessus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalse<
IsEndingBalance>falsefalseterselabel1truefalsefalse67780000006778falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of contractual maturities of domestic and foreign time deposits (including certificates of deposits, individual retirement accounts and open accounts) in denomina
tions of $100,000 or more, for three months or less from the balance sheet date.No authoritative reference available.falsefalse3false0stt_ContractualMaturitiesTimeDeposits100000OrMoreFourMonthsThrough12MonthssttfalsedebitinstantContractual Maturities Time Deposits 100000 Or More Four Months Through 12 Monthsfalsefalsefalsefalsefalsefalsefalsefalse<
/IsBeginningBalance>falsefalseterselabel1truefalsefalse4500000045falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryContractual Maturities Time Deposits 100000 Or More Four Months Through 12 MonthsNo authoritative reference availabl
e.falsefalse4false0us-gaap_TimeDeposits100000OrMoreDomesticus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse68230000006823falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate amount of domestic time deposits (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $100,000 or more.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 01-6
-Paragraph 14
-Subparagraph e
falsefalse13Deposits (Scheduled maturities of U.S. time deposits) (Details) (U.S. Time Deposits [Member], USD $)MillionsUnKnownUnKnownUnKnownfalsetrue
