Condensed Consolidated Statements of Financial Position - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 1,008	$ 1,085
Short-term investments	379	219
Receivables, net	4,905	3,803
Fiduciary assets	20,677	17,566
Other current assets	854	759
Total current assets	27,823	23,432
Goodwill	16,024	15,234
Intangible assets, net	6,733	6,743
Fixed assets, net	664	637
Operating lease right-of-use assets	735	711
Deferred tax assets	861	654
Prepaid pension	598	556
Other non-current assets	572	998
Total assets	54,010	48,965
Current liabilities
Accounts payable and accrued liabilities	2,294	2,905
Short-term debt and current portion of long-term debt	1,837	751
Fiduciary liabilities	20,677	17,566
Other current liabilities	2,267	1,773
Total current liabilities	27,075	22,995
Long-term debt	15,451	16,265
Non-current operating lease liabilities	705	685
Deferred tax liabilities	363	319
Pension, other postretirement, and postemployment liabilities	1,078	1,127
Other non-current liabilities	1,249	1,144
Total liabilities	45,921	42,535
Redeemable noncontrolling interests	81	125
Equity
Ordinary shares - $0.01 nominal value Authorized: 500.0 shares (issued: 2025 - 215.7; 2024 - 216.0)	2	2
Additional paid-in capital	13,258	13,173
Accumulated deficit	(1,574)	(2,309)
Accumulated other comprehensive loss	(3,843)	(4,745)
Total Aon shareholders' equity	7,843	6,121
Nonredeemable noncontrolling interests	165	184
Total equity	8,008	6,305
Total liabilities, redeemable noncontrolling interests and equity	$ 54,010	$ 48,965