Cover Page - shares	9 Months Ended
	Sep. 30, 2020	Nov. 02, 2020
Document Information [Line Items]
Amendment Flag	false
Document Type	10-Q
Document Transition Report	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Document Period End Date	Sep. 30, 2020
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 Small Business	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		463,903,560
Entity Interactive Data Current	Yes
Document Quarterly Report	true
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	615 Merrick Avenue
Entity Address, City or Town	Westbury
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	11590
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock
Security Exchange Name	NYSE
Trading Symbol	NYCB
Bifurcated Option Note Unit SecuritiES
Document Information [Line Items]
Title of 12(b) Security	Bifurcated Option Note Unit SecuritiES
Security Exchange Name	NYSE
Trading Symbol	NYCB PU
Fixed-to-Floating Rate Series A Noncumulative Perpetual Preferred Stock
Document Information [Line Items]
Title of 12(b) Security	Fixed-to-Floating Rate Series A NoncumulativePerpetual Preferred Stock
Security Exchange Name	NYSE
Trading Symbol	NYCB PA