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MORTGAGE BANKING - Changes Related to MSRs - Amortization Method (Details) - Residential mortgages - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
MSRs: |  |
Balance as of beginning of period | $ 221 | $ 201
Amount capitalized | 0 | 8
Amortization | (9) | (8)
Carrying amount before valuation allowance | 212 | 201
Valuation allowance for servicing assets: |  |
Balance at beginning of period | 0 | 3
Valuation recoveries | 0 | (3)
Balance at end of period | 0 | 0
Net carrying value of MSRs | $ 212 | $ 201

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