| Component: (Network and Table) | |
|---|---|
| Network | 2430404 - Disclosure - Acquisition and Restructuring Costs (Activity Related To Restructuring-Related Accruals) (Details) (http://www.statestreet.com/role/AcquisitionAndRestructuringCostsActivityRelatedToRestructuringRelatedAccrualsDetails) |
| Table | Schedule of Restructuring and Related Costs [Table] |
| Reporting Entity [Axis] | 0000093751 (http://www.sec.gov/CIK) |
| Business Acquisition [Line Items] | Period [Axis] | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
2013-01-01 - 2013-12-31 | 2012-01-01 - 2012-12-31 | |||||||||
| Restructuring Type [Axis] | Restructuring Type [Axis] | |||||||||
| Employee Related Costs [Member] | Real Estate Consolidation [Member] | Information Technology Transition Costs [Member] | Assets and Other Write-offs [Member] | Type of Restructuring [Domain] | Employee Related Costs [Member] | Real Estate Consolidation [Member] | Information Technology Transition Costs [Member] | Assets and Other Write-offs [Member] | Type of Restructuring [Domain] | |
Restructuring Reserve [Roll Forward] | ||||||||||
Balance as of December 31, 2012 | ||||||||||
Additional accruals for Business Operations and Information Technology Transformation program | ( | |||||||||
Additional accruals for 2012 expense control measures | ( | ( | ||||||||
Payments and adjustments | ( | ( | ( | ( | ( | |||||
Balance as of December 31, 2013 | 195,000,000 | 49,000,000 | 5,000,000 | 13,000,000 | 262,000,000 | |||||