Litigation and Regulatory Matters - Additional Information (Details) (USD $) In Billions, unless otherwise specified		1 Months Ended							36 Months Ended
	Jun. 30, 2014	Jul. 31, 2011 Madoff Litigation [Member]	Dec. 31, 2010 Madoff Litigation [Member]	May 31, 2014 Benchmark Rate Litigation, Prudential Investment Portfolios [Member] plaintiff	Jun. 30, 2014 Blackrock and PIMCO Funds [Member] trust	May 31, 2014 Residential Mortgage Backed Securities Related Litigation [Member] Institution	Jun. 30, 2014 Hsbc Securities [Member] Residential Mortgage Backed Securities Related Litigation [Member]	Dec. 31, 2013 Hsbc Securities [Member] Residential Mortgage Backed Securities Related Litigation [Member]	Dec. 31, 2007 Hsbc Securities [Member] Mortgage Securitization Activity Related Litigation [Member]	Jun. 30, 2014 Hsbc Securities [Member] Mortgage Securitization Activity Related Litigation [Member]	Dec. 31, 2013 Hsbc Securities [Member] Mortgage Securitization Activity Related Litigation [Member]
Loss Contingencies [Line Items]
Estimate of loss	$ 1.2
Damages sought			9		32
Claims dismissed		6.6
Number of plaintiffs				2
Mortgage Securitization Loan Purchase And Sold									24
Mortgage Securitization Outstanding Loan Purchase And Sold										6.1	6.5
Unpaid principal balance of securities							$ 1.5	$ 1.6
Number of financial institutions						70
Number of Identified Trusts					264