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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Notional Amounts and Gross Fair Values (Detail) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2019 | Dec. 31, 2018
Derivatives, Fair Value [Line Items] |  |
Document Period End Date | Jun. 30, 2019 |
Notional amount | $ 8,202.0 | $ 6,942.0
Derivative asset, not offset against collateral | 1.0 | 2.0
Derivative liability, not offset against collateral | 25.0 | 13.0
Derivative asset, not subject to master netting arrangement | 148.0 | 41.0
Derivative liability, not subject to master netting arrangement | 2.0 | 26.0
Fair value, asset | 149.0 | 43.0
Fair value, liability | 27.0 | 39.0
Interest rate contracts - designated [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative asset, not offset against collateral | 1.0 | 0.0
Derivative liability, not offset against collateral | 1.0 | 3.0
Interest rate swaps - not designated [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative asset, not offset against collateral | 0.0 | 2.0
Derivative liability, not offset against collateral | 24.0 | 10.0
Derivative asset, not subject to master netting arrangement | 145.0 | 40.0
Derivative liability, not subject to master netting arrangement | 1.0 | 26.0
Equity contracts - not designated [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative asset, not offset against collateral | 0.0 | 0.0
Derivative liability, not offset against collateral | 0.0 | 0.0
Derivative asset, not subject to master netting arrangement | 0.0 | 0.0
Derivative liability, not subject to master netting arrangement | 0.0 | 0.0
Interest rate lock commitments – not designated [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative asset, not subject to master netting arrangement | 3.0 | 1.0
Derivative liability, not subject to master netting arrangement | 0.0 | 0.0
Forward delivery commitments – not designated [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative asset, not subject to master netting arrangement | 0.0 | 0.0
Derivative liability, not subject to master netting arrangement | 1.0 | 0.0
Credit risk contracts - not designated [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional amount | 165.2 |
Derivative asset, not subject to master netting arrangement | 0.0 | 0.0
Derivative liability, not subject to master netting arrangement | 0.0 | 0.0
Subject to Master Netting Arrangements [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional amount | 4,506.0 | 3,896.0
Subject to Master Netting Arrangements [Member] | Interest rate contracts - designated [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional amount | 1,355.0 | 1,155.0
Subject to Master Netting Arrangements [Member] | Interest rate swaps - not designated [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional amount | 3,151.0 | 2,740.0
Subject to Master Netting Arrangements [Member] | Equity contracts - not designated [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional amount | 0.0 | 1.0
Not Subject to Master Netting Arrangements [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional amount | 3,696.0 | 3,046.0
Not Subject to Master Netting Arrangements [Member] | Interest rate swaps - not designated [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional amount | 3,151.0 | 2,740.0
Not Subject to Master Netting Arrangements [Member] | Equity contracts - not designated [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional amount | 0.0 | 1.0
Not Subject to Master Netting Arrangements [Member] | Interest rate lock commitments – not designated [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional amount | 130.0 | 47.0
Not Subject to Master Netting Arrangements [Member] | Forward delivery commitments – not designated [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional amount | 185.0 | 55.0
Not Subject to Master Netting Arrangements [Member] | Credit risk contracts - not designated [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional amount | $ 230.0 | $ 203.0

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