POWER OF ATTORNEY

I, Jeffrey C. Campbell ("Grantor"), hereby confirm, constitute and appoint each
of Darren Zeidel, Julie
Cho, and Matthew Cavanaugh, or any of them signing singly, and with full power
of substitution, as the
true and lawful attorney-in-fact of Grantor to:

1.	prepare, execute in Grantor's name and on Grantor's behalf, and submit to the
United
States Securities and Exchange Commission (the "SEC") a Form ID, including
amendments
thereto, and any other documents necessary or appropriate to obtain codes and
passwords
enabling the undersigned to make electronic filings with the SEC of reports
required by Section
16(a) of the Securities Exchange Act of 1934, as amended (the "Exchange Act") or
any rule or
regulation promulgated by the SEC;

2.	execute for and on behalf of Grantor, in Grantor's capacity as an officer,
director or
greater than ten percent shareholder of Aon plc (the "Company"), Forms 3, 4 and
5, including but
not limited to any amendments thereto, in accordance with Section 16(a) of the
Exchange Act,
and the rules promulgated thereunder, which may be necessary or desirable as a
result of
Grantor's ownership of or transaction in securities of the Company; and

3.	do and perform any and all acts for and on behalf of Grantor which may be
necessary or
desirable to complete and execute any such Form 3, 4 or 5 or any amendments
thereto, and timely
file such form with the SEC and any other stock exchange or similar authority.

Grantor hereby grants to each such attorney-in-fact full power and authority to
do and perform any and
every act and thing whatsoever requisite, necessary or proper to be done in the
exercise of any of the
rights and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do
if personally present, with full power of substitution or revocation, hereby
ratifying and confirming all
that such attorney-in-fact, or such attorney-in-fact's substitute or
substitutes, shall lawfully do or cause to
be done by virtue of this power of attorney and the rights and powers herein
granted.  Grantor
acknowledges that the foregoing attorneys-in-fact, in serving in such capacity
at the request of Grantor,
are not assuming, nor is the Company assuming, any of Grantor's responsibilities
to comply with Section
16 of the Exchange Act.

This Power of Attorney shall be effective on the date set forth below and shall
continue in full force and
effect until the date on which Grantor shall cease to be subject to Section 16
of the Exchange Act and the
rules promulgated thereunder or until such earlier date on which written
notification executed by Grantor
is filed with the SEC expressly revoking this Power of Attorney.

IN WITNESS WHEREOF, Grantor has caused this Power of Attorney to be executed as
of the date of 02-Dec-2020.


Signature:	/s/ Jeffrey C. Campbell
		Jeffrey C. Campbell