Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue
Total revenue	$ 17,181	$ 15,698	$ 13,376
Expenses
Compensation and benefits	8,985	8,283	6,902
Information technology	568	539	534
Premises	337	325	294
Depreciation of fixed assets	188	183	167
Amortization and impairment of intangible assets	778	503	89
Other general expense	1,616	1,641	1,470
Accelerating Aon United Program expenses	365	389	135
Total operating expenses	12,837	11,863	9,591
Operating income	4,344	3,835	3,785
Interest income	19	67	31
Interest expense	(815)	(788)	(484)
Other income (expense)	1,211	348	(163)
Income before income taxes	4,759	3,462	3,169
Income tax expense	1,009	742	541
Net income	3,750	2,720	2,628
Less: Net income attributable to redeemable and nonredeemable noncontrolling interests	55	66	64
Net income attributable to Aon shareholders	$ 3,695	$ 2,654	$ 2,564
Basic net income per share attributable to Aon shareholders (in dollars per share)	$ 17.11	$ 12.55	$ 12.60
Diluted net income per share attributable to Aon shareholders (in dollars per share)	$ 17.02	$ 12.49	$ 12.51
Weighted average ordinary shares outstanding - basic (in shares)	215.9	211.4	203.5
Weighted average ordinary shares outstanding - diluted (in shares)	217.1	212.5	205.0