XML 11 R1.htm IDEA: XBRL DOCUMENT v3.19.2
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2019
Aug. 01, 2019
Document Information [Line Items]    
Amendment Flag false  
Document Type 10-Q  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Document Period End Date Jun. 30, 2019  
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   467,362,387
Entity Interactive Data Current Yes  
Document Quarterly Report true  
Document Transition Report false  
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 [Member]    
Document Information [Line Items]    
Trading Symbol NYCB  
Title of 12(b) Security Common Stock  
Security Exchange Name NYSE  
Bifurcated Option Note Unit SecuritiES [Member]    
Document Information [Line Items]    
Trading Symbol NYCB PU  
Title of 12(b) Security Bifurcated Option Note Unit SecuritiES SM  
Security Exchange Name NYSE  
Fixed to Floating Rate Series A Noncumulative Perpetual Preferred Stock [Member]    
Document Information [Line Items]    
Trading Symbol NYCB PR A  
Title of 12(b) Security Fixed-to-Floating Rate Series A Noncumulative Perpetual Preferred Stock  
Security Exchange Name NYSE