Accelerating Aon United Program (Tables)

12 Months Ended

Dec. 31, 2023

Restructuring and Related Activities [Abstract]

Summary of restructuring liabilities for the program

The changes in the Company’s liabilities for the Program as of December 31, 2023 are as follows (in millions):

	Technology and other		Workforce optimization		Asset impairments		Total
Liability Balance as of January 1, 2023	$	—	$	—	$	—	$	—
Charges	14		103		18		135
Cash payments	—		(13)		—		(13)
Foreign currency translation and other	—		1		—		1
Non-cash charges	—		(5)		(18)		(23)
Liability balance as of December 31, 2023	$	14	$	86	$	—	$	100
Total costs incurred from inception to date	$	14	$	103	$	18	$	135