Restructuring Charges by Business Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended			6 Months Ended	12 Months Ended	39 Months Ended	3 Months Ended		6 Months Ended	3 Months Ended			6 Months Ended	3 Months Ended		6 Months Ended
	Mar. 31, 2012 Operational Efficiency Initiatives 2011	Dec. 31, 2011 Operational Efficiency Initiatives 2011	Jun. 30, 2012 Operational Efficiency Initiatives 2011	Mar. 31, 2012 Operational Efficiency Initiatives 2011	Jun. 30, 2012 Operational Efficiency Initiatives 2011 Investment Management	Jun. 30, 2012 Operational Efficiency Initiatives 2011 Investment Management	Mar. 31, 2012 Operational Efficiency Initiatives 2011 Investment Services	Jun. 30, 2012 Operational Efficiency Initiatives 2011 Investment Services	Jun. 30, 2012 Operational Efficiency Initiatives 2011 Other Operating Segment	Jun. 30, 2012 Operational Efficiency Initiatives 2011 Other Operating Segment	Jun. 30, 2012 Global Location Strategy 2009	Mar. 31, 2012 Global Location Strategy 2009	Jun. 30, 2011 Global Location Strategy 2009	Jun. 30, 2012 Global Location Strategy 2009	Dec. 31, 2009 Global Location Strategy 2009	Mar. 31, 2012 Global Location Strategy 2009	Mar. 31, 2012 Global Location Strategy 2009 Investment Management	Jun. 30, 2011 Global Location Strategy 2009 Investment Management	Jun. 30, 2012 Global Location Strategy 2009 Investment Management	Jun. 30, 2012 Global Location Strategy 2009 Investment Services	Mar. 31, 2012 Global Location Strategy 2009 Investment Services	Jun. 30, 2011 Global Location Strategy 2009 Investment Services	Jun. 30, 2012 Global Location Strategy 2009 Investment Services	Mar. 31, 2012 Global Location Strategy 2009 Other Operating Segment	Jun. 30, 2011 Global Location Strategy 2009 Other Operating Segment	Jun. 30, 2012 Global Location Strategy 2009 Other Operating Segment
Restructuring Cost and Reserve [Line Items]
Restructuring charge (recovery)	$ (2)	$ 107		$ (2)	$ 4		$ (2)		$ (4)		$ (4)	$ (7)	$ (4)		$ 139	$ 13	$ (1)	$ 2		$ (4)	$ (7)	$ (5)		$ 1	$ (1)
Total charges since inception			$ 105			$ 21		$ 39		$ 45				$ 148					$ 54				$ 65			$ 29