Share-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of Share-based Compensation Expense Recognized in Continuing Operations

The following table summarizes share-based compensation expense recognized in the Consolidated Statements of Income in Compensation and benefits (in millions):

	Years Ended December 31
	2023		2022		2021
Restricted share units	$	283	$	251	$	204
Performance share awards	143		134		189
Employee share purchase plans and other (1)	12		12		56
Total share-based compensation expense	438		397		449
Tax benefit	91		83		87
Share-based compensation expense, net of tax	$	347	$	314	$	362

(1) 2021 includes expenses related to the Aon United Growth Ownership Plan.

Schedule of Restricted Share Unit Activity

The following table summarizes the status of the Company’s RSUs (shares in thousands, except fair value):

	Shares	Fair Value (1)
Non-vested balance at December 31, 2022	2,863	$	238
Granted	1,128	$	302
Vested	(1,124)	$	221
Forfeited	(193)	$	254
Non-vested balance at December 31, 2023	2,674	$	271

(1)Represents per share weighted average fair value of award at date of grant.

Schedule of Performance-based Plans Information

The following table summarizes the status of the Company's PSAs at 100% of the targeted amount (shares in thousands, except fair value):

	Shares	Fair Value (1)
Non-vested balance at December 31, 2022	1,136	$	222
Granted	331	$	298
Vested	(478)	$	163
Forfeited	(12)	$	285
Non-vested balance at December 31, 2023	977	$	275

(1)Represents per share weighted average fair value of award at date of grant.