LIMITED POWER OF ATTORNEY FOR
SECTION 16 REPORTING OBLIGATIONS


	Know all men by these presents, that I, Scott M. Custer, a Director of F.N.B.
Corporation, a corporation organized and existing under the laws of the State of
Pennsylvania, do constitute and appoint James Orie, Scott Free, Vince Calabrese,
Timothy Rubritz, James L. Dutey, as my true and lawful attorneys-in-fact, with
full power of substitution, for me in any and all capacities, to sign, pursuant
to the requirements of Section 16 of the Securities and Exchange Commission Act
of 1934, as amended, any report on Form 3, Form 4, or Form 5, respecting the
securities of F.N.B. Corporation and to the file the same with the Securities
and Exchange Commission, together with all exhibits thereto and other documents
in connection therewith, and to sign on my behalf and in my stead, in any and
all capacities, any amendments to said reports, incorporating such changes as
said attorneys-in-fact deems appropriate, hereby ratifying and confirming all
that said attorneys-in-fact may do or cause to be done by virtue hereof.

        The authority of my attorneys-in-fact shall be effective until I
expressly revoke it and file same with the Securities and Exchange Commission.


	I acknowledge that I have granted this power of attorney solely to make it more
convenient for me to comply with my reporting responsibilities under Section 16
of the Exchange Act, that my granting of this power of attorney does not relieve
me of any of my responsibilities to prepare and file on a timely basis all
reports that I may be required to file under said Section 16, and that neither
F.N.B. Corporation nor my attorneys-in-fact have assumed, or shall be deemed to
assume, any of my responsibilities in that regard.


	IN WITNESS WHEREOF, I have hereunto set my hand and seal this Thirtieth day of
January, 2017.





                                         __/s/Scott M. Custer_____________
                                         Signature



                                         Scott M. Custer__________________
                                         Print Name



STATE OF NORTH CAROLINA

COUNTY OF WAKE



	Sworn to before me and subscribed in my presence, this Thirtieth day of
January, 2017.


                                          Patricia R. Coats
                                         _________________________________
                                         Notary Public


                                           March 14, 2020
                                         _________________________________
                                         My Commission Expires: