Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

No definition available.

Name:	dei_AmendmentFlag
Namespace Prefix:	dei_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration

- Definition

PCAOB issued Audit Firm Identifier

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form 10-K
-Number 249
-Section 310

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form 20-F
-Number 249
-Section 220
-Subsection f

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form 40-F
-Number 249
-Section 240
-Subsection f

Cover Page - USD ($) $ in Billions	12 Months Ended
Cover Page - USD ($) $ in Billions	Dec. 31, 2021	Feb. 18, 2022	Jun. 30, 2021
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Document Period End Date	Dec. 31, 2021
Entity Central Index Key	0000910073
Current Fiscal Year End Date	--12-31
Entity Registrant Name	NEW YORK COMMUNITY BANCORP, INC.
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Well-known Seasoned Issuer	Yes
Entity Small Business	false
Entity Voluntary Filers	No
Entity Shell Company	false
Entity Public Float			$ 5.0
Entity Common Stock, Shares Outstanding		466,984,658
Entity Interactive Data Current	Yes
Entity File Number	1-31565
Entity Incorporation, State or Country Code	DE
City Area Code	516
Local Phone Number	683-4100
Entity Tax Identification Number	06-1377322
Entity Address, Address Line One	102 Duffy
Entity Address, City or Town	Hicksville
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	11801
ICFR Auditor Attestation Flag	true
Documents Incorporated by Reference	Portions of the definitive Proxy Statement for the Annual Meeting of Shareholders to be held on June 1, 2022 are incorporated by reference into Part III.
Auditor Name	KPMG LLP
Auditor Location	New York, New York
Auditor Firm ID	185
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock
Trading Symbol	NYCB
Security Exchange Name	NYSE
Bifurcated Option Note Unit SecuritiES
Document Information [Line Items]
Title of 12(b) Security	Bifurcated Option Note Unit SecuritiES
Trading Symbol	NYCB PU
Security Exchange Name	NYSE
Fixed-to-Floating Rate Series A Noncumulative Perpetual Preferred Stock
Document Information [Line Items]
Title of 12(b) Security	Depositary Shares each representing
Trading Symbol	NYCB PA
Security Exchange Name	NYSE