Restructuring Charges- by Business Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			3 Months Ended			3 Months Ended			3 Months Ended			3 Months Ended		12 Months Ended	33 Months Ended		3 Months Ended			3 Months Ended			3 Months Ended
	Sep. 30, 2014 Streamlining Actions	Jun. 30, 2014 Streamlining Actions	Apr. 01, 2014 Streamlining Actions	Sep. 30, 2014 Streamlining Actions Investment Management	Jun. 30, 2014 Streamlining Actions Investment Management	Apr. 01, 2014 Streamlining Actions Investment Management	Sep. 30, 2014 Streamlining Actions Investment Services	Jun. 30, 2014 Streamlining Actions Investment Services	Apr. 01, 2014 Streamlining Actions Investment Services	Sep. 30, 2014 Streamlining Actions Other	Jun. 30, 2014 Streamlining Actions Other	Apr. 01, 2014 Streamlining Actions Other	Sep. 30, 2014 Operational Efficiency Initiatives 2011	Jun. 30, 2014 Operational Efficiency Initiatives 2011	Dec. 31, 2011 Operational Efficiency Initiatives 2011	Jun. 30, 2014 Operational Efficiency Initiatives 2011	Oct. 03, 2011 Operational Efficiency Initiatives 2011	Sep. 30, 2014 Operational Efficiency Initiatives 2011 Investment Management	Jun. 30, 2014 Operational Efficiency Initiatives 2011 Investment Management	Oct. 03, 2011 Operational Efficiency Initiatives 2011 Investment Management	Sep. 30, 2014 Operational Efficiency Initiatives 2011 Investment Services	Jun. 30, 2014 Operational Efficiency Initiatives 2011 Investment Services	Oct. 03, 2011 Operational Efficiency Initiatives 2011 Investment Services	Sep. 30, 2014 Operational Efficiency Initiatives 2011 Other	Jun. 30, 2014 Operational Efficiency Initiatives 2011 Other	Oct. 03, 2011 Operational Efficiency Initiatives 2011 Other
Restructuring Cost and Reserve [Line Items]
Net additional charges (net recovery/gain)	$ 53	$ 125		$ 7	$ 15		$ 23	$ 76		$ 23	$ 34		$ 4	$ (5)	$ 107	$ 38		$ (2)	$ 0		$ 4	$ (3)		$ 2	$ (2)
Total charges since inception			$ 178			$ 22			$ 99			$ 57					$ 149			$ 50			$ 86			$ 13