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Commitments and Contingencies - Guarantees and Indemnifications (Detail) $ in Millions | Dec. 31, 2021 USD ($)
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Loss Contingencies [Line Items] |
Expires Within One Year | $ 87
Expires After One Year | 61
Total Outstanding Amount | 148
Maximum Potential Amount of Future Payments | 291
Financial stand-by letters of credit |
Loss Contingencies [Line Items] |
Expires Within One Year | 77
Expires After One Year | 60
Total Outstanding Amount | 137
Maximum Potential Amount of Future Payments | 271
Performance stand-by letters of credit |
Loss Contingencies [Line Items] |
Expires Within One Year | 3
Total Outstanding Amount | 3
Maximum Potential Amount of Future Payments | 3
Commercial Letters of Credit |
Loss Contingencies [Line Items] |
Expires Within One Year | 7
Expires After One Year | 1
Total Outstanding Amount | 8
Maximum Potential Amount of Future Payments | $ 17

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- Definition Guarantee obligations carrying value. + References No definition available. + Details
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Namespace Prefix: | nycb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Guarantee obligations noncurrent carrying value. + References No definition available. + Details
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Namespace Prefix: | nycb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248 + Details
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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248 + Details
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Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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