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Mortgage Servicing Rights ("MSRs") and Related Liabilities - Servicing Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Transfers and Servicing [Abstract] |  |  |  |
Contractually specified servicing fees | $ 307 | $ 245 | $ 588 | $ 495
Other service-related income | 32 | 28 | 82 | 56
Incentive and modification income | 10 | 18 | 17 | 33
Late fees | 27 | 22 | 52 | 46
Reverse servicing fees | 8 | 14 | 17 | 33
Mark-to-market adjustments | (231) | 19 | (524) | 171
Counterparty revenue share | (70) | (50) | (118) | (95)
Amortization, net of accretion | (56) | (48) | (79) | (96)
Total servicing revenue | $ 27 | $ 248 | $ 35 | $ 643

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- Definition All amounts that, per contract, are due to the servicer in exchange for servicing the financial asset and would no longer be received by a servicer if the beneficial owners of the serviced assets (or their trustees or agents) were to exercise their actual or potential authority under the contract to shift the servicing to another servicer. Depending on the servicing contract, those fees may include some or all of the difference between the interest rate collected on the asset being serviced and the rate to be paid to the beneficial owners of the asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122596-111746 + Details
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- Definition All amounts that are due to the servicer of a financial asset as a result of the debt holder not meeting the monthly payment terms. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122596-111746 + Details
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