Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

Name:	us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Litigation and Regulatory Matters - Additional Information (Details) - USD ($)	Feb. 17, 2016	Jun. 30, 2016	Dec. 31, 2015
Loss Contingencies [Line Items]
Estimate of loss		$ 200,000,000
Mortgage Securitization Activity Related Litigation [Member] \| HSBC Securities [Member]
Loss Contingencies [Line Items]
Mortgage securitization outstanding loan purchase and sold		$ 4,900,000,000	$ 5,200,000,000
Lender-Placed Insurance Matters [Member]
Loss Contingencies [Line Items]
Litigation settlement	$ 4,000,000