Consolidated Statements of Financial Position - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 778	$ 690
Short-term investments	369	452
Receivables, net	3,254	3,035
Fiduciary assets	16,307	15,900
Other current assets	996	646
Total current assets	21,704	20,723
Goodwill	8,414	8,292
Intangible assets, net	234	447
Fixed assets, net	638	558
Operating lease right-of-use assets	650	699
Deferred tax assets	1,195	824
Prepaid pension	618	652
Other non-current assets	506	509
Total assets	33,959	32,704
Current liabilities
Accounts payable and accrued liabilities	2,262	2,114
Short-term debt and current portion of long-term debt	1,204	945
Fiduciary liabilities	16,307	15,900
Other current liabilities	1,878	1,347
Total current liabilities	21,651	20,306
Long-term debt	9,995	9,825
Non-current operating lease liabilities	641	693
Deferred tax liabilities	115	99
Pension, other postretirement, and postemployment liabilities	1,225	1,186
Other non-current liabilities	1,074	1,024
Total liabilities	34,701	33,133
Equity (deficit)
Ordinary shares - $0.01 nominal value Authorized: 500.0 shares (issued: 2023 - 198.6; 2022 - 205.4)	2	2
Additional paid-in capital	6,944	6,864
Accumulated deficit	(3,399)	(2,772)
Accumulated other comprehensive loss	(4,373)	(4,623)
Total Aon shareholders' deficit	(826)	(529)
Noncontrolling interests	84	100
Total deficit	(742)	(429)
Total liabilities and equity (deficit)	$ 33,959	$ 32,704