Line of Business Information (Tables)

12 Months Ended

Dec. 31, 2012

Segment Reporting [Abstract]

Summary Of Line Of Business Results

The following is a summary of our line of business results for the periods indicated. The “Other” column for 2012 included the net realized loss from the sale of all of our Greek investment securities previously classified as held to maturity; a benefit related to claims associated with the 2008 Lehman Brothers bankruptcy; provisions for litigation exposure and other costs; acquisition-related integration costs; and restructuring charges associated with both our Business Operations and Information Technology Transformation program and expense control measures.

The “Other” column for 2011 included acquisition-related integration costs and restructuring charges associated with our Business Operations and Information Technology Transformation program and expense control measures. The “Other” column for 2010 included the net loss from sales of investment securities associated with the December 2010 investment portfolio repositioning, acquisition-related integration costs, and restructuring charges associated with our Business Operations and Information Technology Transformation program. The amounts in the “Other” columns were not allocated to State Street's business lines. Results for 2011 reflect the retroactive effect of management changes in methodology related to funds transfer pricing and expense allocation in 2012. Results for 2010 were not restated.

	Years Ended December 31,
(Dollars in millions, except where otherwise noted)	Investment Servicing									Investment Management									Other									Total
	2012			2011			2010			2012			2011			2010			2012			2011			2010			2012			2011			2010
Fee revenue:
Servicing fees	$	4,414		$	4,382		$	3,938		$	—		$	—		$	—		$	—		$	—		$	—		$	4,414		$	4,382		$	3,938
Management fees	—			—			—			993			917			829			—			—			—			993			917			829
Trading services	1,010			1,220			1,106			—			—			—			—			—			—			1,010			1,220			1,106
Securities finance	363			333			265			42			45			53			—			—			—			405			378			318
Processing fees and other	161			195			225			105			102			124			—			—			—			266			297			349
Total fee revenue	5,948			6,130			5,534			1,140			1,064			1,006			—			—			—			7,088			7,194			6,540
Net interest revenue	2,456			2,231			2,553			82			102			146			—			—			—			2,538			2,333			2,699
Gains (losses) related to investment securities, net	69			67			58			—			—			—			(46		)	—			(344		)	23			67			(286		)
Total revenue	8,473			8,428			8,145			1,222			1,166			1,152			(46		)	—			(344		)	9,649			9,594			8,953
Provision for loan losses	(3		)	—			25			—			—			—			—			—			—			(3		)	—			25
Expenses from operations	6,033			5,890			5,430			872			899			753			—			—			(7		)	6,905			6,789			6,176
Securities lending charge	—			—			75			—			—			339			—			—			—			—			—			414
Claims resolution	—			—			—			—			—			—			(362		)	—			—			(362		)	—			—
Provisions for litigation exposure and other costs	—			—			—			—			—			—			118			—			—			118			—			—
Acquisition and restructuring costs, net	—			—			—			—			—			—			225			269			252			225			269			252
Total expenses	6,033			5,890			5,505			872			899			1,092			(19		)	269			245			6,886			7,058			6,842
Income (loss) before income tax expense	$	2,443		$	2,538		$	2,615		$	350		$	267		$	60		$	(27	)	$	(269	)	$	(589	)	$	2,766		$	2,536		$	2,086
Pre-tax margin	29		%	30		%	32		%	29		%	23		%	5		%										29		%	26		%	23		%
Average assets (in billions)	$	189.8		$	170.4		$	146.9		$	4.0		$	4.4		$	5.1											$	193.8		$	174.8		$	152.0