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Mortgage Servicing - Schedule of Activity Related to MSRs - Amortization Method (Footnote) (Details) - Non Agency Mortgage Servicing Rights [Member] $ in Millions	12 Months Ended
	Dec. 31, 2014 USD ($)
Servicing Asset at Amortized Cost [Line Items]
Fair value measurement of non-agency MSRs, cumulative-effect on retained earnings	$ 52.0
Deferred income taxes	9.2
Unpaid principal balance of MSRs	$ 195,300.0

X

- Definition

Amount of deferred income tax expense (benefit) and income tax credits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 20



-Section 55



-Paragraph 24



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-Name Accounting Standards Codification



-Topic 230



-SubTopic 10



-Section 45



-Paragraph 28



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For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 825



-SubTopic 10



-Section 50



-Paragraph 30



-Subparagraph (a)



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The carrying amount of the outstanding balance due under the mortgage loan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 205



-SubTopic 10



-Section S99



-Paragraph 6



-Subparagraph (SX 210.5-04.(c) Schedule IV)



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-Section S99



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-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 29



-Article 12



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