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Regulatory Capital (Tables)
 12 Months Ended
Dec. 31, 2022
Banking and Thrift, Other Disclosure [Abstract]  
Schedule of Regulatory Capital
The following table presents the regulatory capital structure, total RWA, related regulatory capital ratios and the minimum required regulatory capital ratios for us and State Street Bank as of the dates indicated.
State Street Corporation
State Street Bank
(Dollars in millions)Basel III Advanced Approaches December 31, 2022Basel III Standardized Approach December 31, 2022Basel III Advanced Approaches December 31, 2021Basel III Standardized Approach December 31, 2021Basel III Advanced Approaches December 31, 2022Basel III Standardized Approach December 31, 2022Basel III Advanced Approaches December 31, 2021Basel III Standardized Approach December 31, 2021
 Common shareholders' equity:
Common stock and related surplus$11,234 $11,234 $11,291 $11,291 $13,033 $13,033 $13,047 $13,047 
Retained earnings27,028 27,028 25,238 25,238 16,975 16,975 15,700 15,700 
Accumulated other comprehensive income (loss)(3,711)(3,711)(1,133)(1,133)(3,428)(3,428)(926)(926)
Treasury stock, at cost(11,336)(11,336)(10,009)(10,009)— — — — 
Total23,215 23,215 25,387 25,387 26,580 26,580 27,821 27,821 
Regulatory capital adjustments:
Goodwill and other intangible assets, net of associated deferred tax liabilities(8,545)(8,545)(8,935)(8,935)(8,288)(8,288)(8,667)(8,667)
Other adjustments(1)
(123)(123)(505)(505)(19)(19)(309)(309)
 Common equity tier 1 capital14,547 14,547 15,947 15,947 18,273 18,273 18,845 18,845 
Preferred stock1,976 1,976 1,976 1,976 — — — — 
 Tier 1 capital16,523 16,523 17,923 17,923 18,273 18,273 18,845 18,845 
Qualifying subordinated long-term debt1,376 1,376 1,588 1,588 542 542 752 752 
Allowance for credit losses— 120 — 108 — 120 — 108 
 Total capital$17,899 $18,019 $19,511 $19,619 $18,815 $18,935 $19,597 $19,705 
 Risk-weighted assets:
Credit risk(2)
$61,108 $105,739 $63,735 $109,554 $54,675 $104,184 $57,405 $106,405 
Operational risk(3)
42,763  NA45,550 NA42,325 NA42,813 NA
Market risk1,488 1,488 2,113 2,113 1,488 1,488 2,113 2,113 
Total risk-weighted assets$105,359 $107,227 $111,398 $111,667 $98,488 $105,672 $102,331 $108,518 
Adjusted quarterly average assets$275,678 $275,678 $293,567 $293,567 $273,220 $273,220 $290,403 $290,403 
Capital Ratios:
2022 Minimum Requirements(4)
2021 Minimum Requirements(4)
Common equity tier 1 capital8.0 %8.0 %13.8 %13.6 %14.3 %14.3 %18.6 %17.3 %18.4 %17.4 %
Tier 1 capital9.5 9.5 15.7 15.4 16.1 16.1 18.6 17.3 18.4 17.4 
Total capital11.5 11.5 17.0 16.8 17.5 17.6 19.1 17.9 19.2 18.2 
Tier 1 leverage(5)
4.0 4.0 6.0 6.0 6.1 6.1 6.7 6.7 6.5 6.5 
(1) Other adjustments within CET1 capital include accumulated other comprehensive income (loss) on cash flow hedges that are not recognized at fair value on the balance sheet, the overfunded portion of our defined benefit pension plan obligation net of associated deferred tax liabilities, disallowed deferred tax assets, and other required credit risk-based deductions.
(2) Under the advanced approaches, credit risk RWA includes a CVA which reflects the risk of potential fair value adjustments for credit risk reflected in our valuation of over-the-counter (OTC) derivative contracts. We used a simple CVA approach in conformity with the Basel III advanced approaches.
(3) Under the current advanced approaches rules and regulatory guidance concerning operational risk models, RWA attributable to operational risk can vary substantially from period-to-period, without direct correlation to the effects of a particular loss event on our results of operations and financial condition and impacting dates and periods that may differ from the dates and periods as of and during which the loss event is reflected in our financial statements, with the timing and categorization dependent on the processes for model updates and, if applicable, model revalidation and regulatory review and related supervisory processes. An individual loss event can have a significant effect on the output of our operational RWA under the advanced approaches depending on the severity of the loss event and its categorization among the seven Basel-defined UOMs.
(4) Minimum requirements include a CCB of 2.5% and a SCB of 2.5% for the advanced approaches and the standardized approach, respectively, a G-SIB surcharge of 1.0% and a countercyclical buffer of 0%.
(5) State Street Bank is required to maintain a minimum Tier 1 leverage ratio of 5% as it is the insured depository institution subsidiary of State Street Corporation, a U.S. G-SIB.
NA Not applicable