Consolidated Statements of Financial Position - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 1,085	$ 778
Short-term investments	219	369
Receivables, net	3,803	3,254
Fiduciary assets	17,566	16,307
Other current assets	759	996
Total current assets	23,432	21,704
Goodwill	15,234	8,414
Intangible assets, net	6,743	234
Fixed assets, net	637	638
Operating lease right-of-use assets	711	650
Deferred tax assets	654	1,195
Prepaid pension	556	618
Other non-current assets	998	506
Total assets	48,965	33,959
Current liabilities
Accounts payable and accrued liabilities	2,905	2,262
Short-term debt and current portion of long-term debt	751	1,204
Fiduciary liabilities	17,566	16,307
Other current liabilities	1,773	1,878
Total current liabilities	22,995	21,651
Long-term debt	16,265	9,995
Non-current operating lease liabilities	685	641
Deferred tax liabilities	319	115
Pension, other postretirement, and postemployment liabilities	1,127	1,225
Other non-current liabilities	1,144	1,074
Total liabilities	42,535	34,701
Redeemable noncontrolling interests	125	0
Equity (deficit)
Ordinary shares - $0.01 nominal value Authorized: 500.0 shares (issued: 2024 - 216.0; 2023 - 198.6)	2	2
Additional paid-in capital	13,173	6,944
Accumulated deficit	(2,309)	(3,399)
Accumulated other comprehensive loss	(4,745)	(4,373)
Total Aon shareholders' equity (deficit)	6,121	(826)
Nonredeemable noncontrolling interests	184	84
Total equity (deficit)	6,305	(742)
Total liabilities, redeemable noncontrolling interests, and equity (deficit)	$ 48,965	$ 33,959