Condensed Consolidated Statements of Financial Position - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 1,095	$ 1,085
Short-term investments	207	219
Receivables, net	4,276	3,803
Fiduciary assets	18,781	17,566
Other current assets	2,210	759
Total current assets	26,569	23,432
Goodwill	15,704	15,234
Intangible assets, net	5,827	6,743
Fixed assets, net	684	637
Operating lease right-of-use assets	681	711
Deferred tax assets	855	654
Prepaid pension	588	556
Other non-current assets	729	998
Total assets	51,637	48,965
Current liabilities
Accounts payable and accrued liabilities	2,398	2,905
Short-term debt and current portion of long-term debt	1,735	751
Fiduciary liabilities	18,781	17,566
Other current liabilities	2,189	1,773
Total current liabilities	25,103	22,995
Long-term debt	15,055	16,265
Non-current operating lease liabilities	651	685
Deferred tax liabilities	361	319
Pension, other postretirement, and postemployment liabilities	1,052	1,127
Other non-current liabilities	1,216	1,144
Total liabilities	43,438	42,535
Redeemable noncontrolling interests	85	125
Equity
Ordinary shares - $0.01 nominal value Authorized: 500.0 shares (issued: 2025 - 215.2; 2024 - 216.0)	2	2
Additional paid-in capital	13,379	13,173
Accumulated deficit	(1,527)	(2,309)
Accumulated other comprehensive loss	(3,915)	(4,745)
Total Aon shareholders' equity	7,939	6,121
Nonredeemable noncontrolling interests	175	184
Total equity	8,114	6,305
Total liabilities, redeemable noncontrolling interests and equity	$ 51,637	$ 48,965