2.2.0.25truefalse40502 - Disclosure - Goodwill and Other Intangible Assets (Goodwill) (Details)truefalseIn Millionsfalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010
USD ($)
USD ($) / shares
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USD ($)
USD ($) / shares
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1/1/2010 - 12/31/2010
USD ($)
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1/1/2009 - 12/31/2009
USD ($)
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12/31/2010
USD ($)
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12/31/2009
USD ($)
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Diso42170USDUSD$7falsefalseUSDtruefalse{us-gaap_GoodwillBySegmentAxis} : Investment Management [Member]
12/31/2008
USD ($)
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Diso42170USDUSD$2false0us-gaap_Goodwillus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsetruefalsefalseperiodstartlabel1truefalsefalse45500000004550falsetruefalsefalsefalse2truefalsefalse45270000004527falsetruefalsefalsefalse3truefalsefalse45440000004544falsetruefalsetruefalse4truefalsefalse45210000004521f
alsetruefalsetruefalse5truefalsefalse60000006falsetruefalsetruefalse6truefalsefalse60000006
falsetruefalsetruefalse7truefalsefalse60000006falsetruefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryCarrying amount as of the balance sheet date, which is the cumulative amount paid, adjusted for any amortization recognized prior to a
doption of FAS 142 and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43
falsefalse3false0stt_ReductionOfGoodwillPreviouslyRecordedsttfalsecreditdurationReduction Of Goodwill Previously Recordedfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1false
falsefalse00falsefalsefalsefalsefalse2truefalsefalse-16000000-16falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4truefalsefalse-16000000-16falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsef
alsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryReduction Of Goodwill Previously RecordedNo authoritative reference available.falsefalse4false0us-gaap_GoodwillAcquiredDuringPeriodus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse10050000001005fa
lsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse10050000001005falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00fal
sefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e(1)
falsefalse5false0us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustmentsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse4200000042falsefalsefalsefalsefalse2truefalsefalse3900000039falsefalsefalsefalsefalse3
truefalsefalse4200000042falsefalsefalsetruefalse4truefalsefalse3900000039falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7
falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryReflects net changes to the recorded value of goodwill for foreign currency translation adjustments and purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
falsefalse6false0us-gaap_Goodwillus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsetruefalseperiodendlabel1truefalsefalse55970000005597falsetruefalsefalsefalse2truefalsefalse45500000004550falsetruefalsefalsefalse3truefalsefalse55910000005591falsetruefalsetruefalse4truefalsefalse45440000004544falsetruefalsetruefalse5truefalsefalse60000006falsetruefalsetruefalse6truefalsefalse60000006falsetruefalsetruefalse7truefalsefalse60000006falsetruefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryCarrying amount as of the balance sheet date, which is the cumulative amount paid, adjusted for any amortization recognized prior to adoption of FAS 142 and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.Reference 1: http://www.xbrl.org/2003/role/presentatio
nRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43
falsefalse75Goodwill and Other Intangible Assets (Goodwill) (Details) (USD $)MillionsUnKnownUnKnownUnKnownfalsetrue
