Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Revenue
Total revenue	$ 5,034	$ 4,729
Expenses
Compensation and benefits	2,393	2,249
Information technology	144	136
Premises	81	82
Depreciation of fixed assets	46	46
Amortization and impairment of intangible assets	152	199
Other general expense	411	446
Accelerating Aon United Program expenses	92	110
Total operating expenses	3,319	3,268
Operating income	1,715	1,461
Interest income	12	5
Interest expense	(179)	(206)
Other income (expense)	5	(10)
Income before income taxes	1,553	1,250
Income tax expense	314	268
Net income	1,239	982
Less: Net income attributable to redeemable and nonredeemable noncontrolling interests	27	17
Net income attributable to Aon shareholders	$ 1,212	$ 965
Basic net income per share attributable to Aon shareholders (in dollars per share)	$ 5.66	$ 4.46
Diluted net income per share attributable to Aon shareholders (in dollars per share)	$ 5.63	$ 4.43
Weighted average ordinary shares outstanding - basic (in shares)	214.3	216.4
Weighted average ordinary shares outstanding - diluted (in shares)	215.4	217.9