Power of Attorney

    Know all by these presents, that the undersigned hereby makes, constitutes
and appoints each of Julie P. Aslaksen and William K. Kelso, or either of them
acting singly, and with full power of substitution and re-substitution, the
undersigned's true and lawful attorney in fact (each of such persons and their
substitutes being referred to herein as the "Attorney-in-Fact"), with full power
to act for the undersigned and in the undersigned's name, place and stead, in
any and all capacities, to prepare, execute and submit to the U.S. Securities
and Exchange Commission (the "SEC"), Host Hotels & Resorts, Inc. (the
"Company"), and/or any national securities exchange on which the Company's
securities are listed any and all reports (including any amendments thereto) the
undersigned is required to file with the SEC, or which the Attorney-in-Fact
considers it advisable to file with the SEC, under Section 13 or Section 16 of
the Exchange Act, or any rule or regulation thereunder, or under Rule 144 under
the Securities Act of 1933 ("Rule 144"), with respect to the any security of the
Company, including Forms 3, 4 and 5, Schedules 13D and 13G, and Forms 144.

    The undersigned acknowledges that:

    (a)   Neither the Company nor the Attorney-in-Fact assumes any liability for
          the undersigned's responsibility to comply with the requirements of
          Section 13 or Section 16 of the Exchange Act or Rule 144, any
          liability of the undersigned for any failure to comply with such
          requirements, or any liability of the undersigned for disgorgement of
          profits under Section 16(b) of the Exchange Act; and

    (b)   This Power of Attorney does not relieve the undersigned from
          responsibility for compliance with the undersigned's obligations under
          Section 13 or Section 16 of the Exchange Act, including, without
          limitation, the reporting requirements under Section 13 or Section 16
          of the Exchange Act.

    The undersigned hereby grants to the Attorney-in-Fact full power and
authority to do and perform each and every act and thing requisite, necessary or
advisable to be done in connection with the foregoing, as fully, to all intents
and purposes, as the undersigned might or could do in person, hereby ratifying
and confirming all that the Attorney-in-Fact, or his or her substitute or
substitutes, shall lawfully do or cause to be done by authority of this Power of
Attorney.

    This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 4 or 5 or Schedules 13D or 13G
or Forms 144 with respect to the undersigned's holdings of and transactions in
securities of the Company, unless earlier revoked by the undersigned in a signed
writing delivered to the Attorney-in-Fact. This Power of Attorney revokes all
previous powers of attorney with respect to the subject matter of this Power of
Attorney.

    IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney as
of January 5, 2021.


                                             /s/ Joseph Ottinger
                                             --------------------------
                                             Joseph Ottinger