Aon (AON) 8-K Regulation FD Disclosure

Exhibit 99.1

Aon Corporation

Consolidated Summary of Operations - Reclassified for Discontinued Operations

	2004
(millions except per share data)	1st Quarter			2nd Quarter			Six Months
Revenue
Brokerage commissions and fees	$	1,791		$	1,759		$	3,550
Premiums and other	692			716			1,408
Investment income	81			69			150
Total revenue	2,564			2,544			5,108
Expenses
General expenses	1,834			1,821			3,655
Benefits to policyholders	383			392			775
Interest expense	34			35			69
Amortization of intangible assets	13			14			27
Total expenses	2,264			2,262			4,526
Income from continuing operations before income tax	300			282			582
Provision for income tax	108			102			210
Income from continuing operations	192			180			372
Discontinued operations
Loss from discontinued operations	(28		)	(10		)	(38		)
Income tax benefit	(6		)	(3		)	(9		)
Loss from discontinued operations, net of tax	(22		)	(7		)	(29		)
Net income	$	170		$	173		$	343
Preferred stock dividends	(1		)	—			(1		)
Net income available for common stockholders	$	169		$	173		$	342
Basic net income per share:
Income from continuing operations	$	0.60		$	0.56		$	1.16
Discontinued operations	(0.07		)	(0.02		)	(0.09		)
Net income	$	0.53		$	0.54		$	1.07
Dilutive net income per share:
Income from continuing operations	$	0.60		$	0.54		$	1.13
Discontinued operations	(0.07		)	(0.02		)	(0.09		)
Net income	$	0.53		$	0.52		$	1.04
Dilutive average common and common equivalent shares outstanding	321.3			337.1			329.2

	2003
(millions except per share data)	1st Quarter			2nd Quarter			3rd Quarter			4th Quarter			Full Year
Revenue
Brokerage commissions and fees	$	1,652		$	1,687		$	1,638		$	1,820		$	6,797
Premiums and other	632			635			673			669			2,609
Investment income	79			89			57			87			312
Total revenue	2,363			2,411			2,368			2,576			9,718
Expenses
General expenses	1,671			1,775			1,718			1,849			7,013
Benefits to policyholders	345			325			367			390			1,427
Interest expense	28			27			24			22			101
Amortization of intangible assets	12			14			17			17			60
Unusual charges (credits) - World Trade Center	37			9			—			(60		)	(14		)
Total expenses	2,093			2,150			2,126			2,218			8,587
Income from continuing operations before income tax and minority interest	270			261			242			358			1,131
Provision for income tax	100			96			90			133			419
Income from continuing operations before minority interest	170			165			152			225			712
Minority interest - 8.205% trust preferred capital securities	(9		)	(9		)	(9		)	(9		)	(36		)
Income from continuing operations	161			156			143			216			676
Discontinued operations
Loss from discontinued operations	(14		)	(16		)	(44		)	(2		)	(76		)
Income tax benefit	(5		)	(6		)	(16		)	(1		)	(28		)
Loss from discontinued operations, net of tax	(9		)	(10		)	(28		)	(1		)	(48		)
Net income	$	152		$	146		$	115		$	215		$	628
Preferred stock dividends	(1		)	—			(1		)	(1		)	(3		)
Net income available for common stockholders	$	151		$	146		$	114		$	214		$	625
Basic net income per share:
Income from continuing operations	$	0.51		$	0.49		$	0.45		$	0.67		$	2.12
Discontinued operations	(0.03		)	(0.03		)	(0.09		)	—			(0.15		)
Net income	$	0.48		$	0.46		$	0.36		$	0.67		$	1.97
Dilutive net income per share:
Income from continuing operations	$	0.51		$	0.49		$	0.45		$	0.67		$	2.12
Discontinued operations	(0.03		)	(0.03		)	(0.09		)	—			(0.15		)
Net income	$	0.48		$	0.46		$	0.36		$	0.67		$	1.97
Dilutive average common and common equivalent shares outstanding	315.2			318.2			318.6			319.3			317.8

	2002
(millions except per share data)	1st Quarter			2nd Quarter			3rd Quarter			4th Quarter			Full Year
Revenue
Brokerage commissions and fees	$	1,420		$	1,483		$	1,527		$	1,667		$	6,097
Premiums and other	535			638			607			588			2,368
Investment income (loss)	109			(26		)	87			81			251
Total revenue	2,064			2,095			2,221			2,336			8,716
Expenses
General expenses	1,430			1,636			1,616			1,673			6,355
Benefits to policyholders	314			391			350			320			1,375
Interest expense	29			30			32			33			124
Amortization of intangible assets	11			13			12			15			51
Unusual credits - World Trade Center	—			—			(18		)	(11		)	(29		)
Total expenses	1,784			2,070			1,992			2,030			7,876
Income from continuing operations before income tax and minority interest	280			25			229			306			840
Provision for income tax	104			9			84			113			310
Income from continuing operations before minority interest	176			16			145			193			530
Minority interest - 8.205% trust preferred capital securities	(10		)	(10		)	(10		)	(4		)	(34		)
Income from continuing operations	166			6			135			189			496
Discontinued operations
Loss from discontinued operations	(9		)	(9		)	(12		)	(17		)	(47		)
Income tax benefit	(3		)	(3		)	(5		)	(6		)	(17		)
Loss from discontinued operations, net of tax	(6		)	(6		)	(7		)	(11		)	(30		)
Net income	$	160		$	—		$	128		$	178		$	466
Preferred stock dividends	(1		)	—			(1		)	(1		)	(3		)
Net income available for common stockholders	$	159		$	—		$	127		$	177		$	463
Basic net income per share:
Income from continuing operations	$	0.60		$	0.02		$	0.49		$	0.63		$	1.76
Discontinued operations	(0.02		)	(0.02		)	(0.03		)	(0.04		)	(0.11		)
Net income	$	0.58		$	—		$	0.46		$	0.59		$	1.65
Dilutive net income per share:
Income from continuing operations	$	0.59		$	0.02		$	0.49		$	0.63		$	1.75
Discontinued operations	(0.02		)	(0.02		)	(0.03		)	(0.04		)	(0.11		)
Net income	$	0.57		$	—		$	0.46		$	0.59		$	1.64
Dilutive average common and common equivalent shares outstanding	276.6			278.0			277.1			299.0			282.6

	2001
(millions except per share data)	1st Quarter			2nd Quarter			3rd Quarter			4th Quarter			Full Year
Revenue
Brokerage commissions and fees	$	1,273		$	1,334		$	1,284		$	1,499		$	5,390
Premiums and other	508			492			510			517			2,027
Investment income	21			78			105			7			211
Total revenue	1,802			1,904			1,899			2,023			7,628
Expenses
General expenses	1,347			1,505			1,365			1,491			5,708
Benefits to policyholders	292			260			271			288			1,111
Interest expense	36			31			31			29			127
Amortization of intangible assets	39			38			40			40			157
Unusual charges - World Trade Center	—			—			53			105			158
Total expenses	1,714			1,834			1,760			1,953			7,261
Income from continuing operations before income tax and minority interest	88			70			139			70			367
Provision for income tax	35			27			53			30			145
Income from continuing operations before minority interest	53			43			86			40			222
Minority interest - 8.205% trust preferred capital securities	(10		)	(10		)	(10		)	(10		)	(40		)
Income from continuing operations	43			33			76			30			182
Discontinued operations
Loss from discontinued operations	(40		)	(6		)	(6		)	(6		)	(58		)
Income tax benefit	(16		)	(2		)	(2		)	(3		)	(23		)
Loss from discontinued operations, net of tax	(24		)	(4		)	(4		)	(3		)	(35		)
Net income	$	19		$	29		$	72		$	27		$	147
Preferred stock dividends	(1		)	—			(1		)	(1		)	(3		)
Net income available for common stockholders	$	18		$	29		$	71		$	26		$	144
Basic net income per share:
Income from continuing operations	$	0.16		$	0.12		$	0.27		$	0.11		$	0.67
Discontinued operations	(0.09		)	(0.01		)	(0.01		)	(0.01		)	(0.13		)
Net income	$	0.07		$	0.11		$	0.26		$	0.10		$	0.54
Dilutive net income per share:
Income from continuing operations	$	0.16		$	0.12		$	0.27		$	0.11		$	0.66
Discontinued operations	(0.09		)	(0.01		)	(0.01		)	(0.01		)	(0.13		)
Net income	$	0.07		$	0.11		$	0.26		$	0.10		$	0.53
Dilutive average common and common equivalent shares outstanding	267.9			270.2			275.4			276.9			272.4

	2000
(millions except per share data)	1st Quarter			2nd Quarter			3rd Quarter			4th Quarter			Full Year
Revenue
Brokerage commissions and fees	$	1,191		$	1,190		$	1,164		$	1,349		$	4,894
Premiums and other	468			491			476			486			1,921
Investment income	136			124			132			112			504
Total revenue	1,795			1,805			1,772			1,947			7,319
Expenses
General expenses	1,258			1,250			1,196			1,438			5,142
Benefits to policyholders	252			257			257			271			1,037
Interest expense	31			33			38			38			140
Amortization of intangible assets	38			39			38			39			154
Total expenses	1,579			1,579			1,529			1,786			6,473
Income from continuing operations before income tax and minority interest	216			226			243			161			846
Provision for income tax	84			88			95			63			330
Income from continuing operations before minority interest	132			138			148			98			516
Minority interest - 8.205% trust preferred capital securities	(10		)	(10		)	(10		)	(10		)	(40		)
Income from continuing operations	122			128			138			88			476
Discontinued operations
Income from discontinued operations	2			2			1			3			8
Income tax provision	1			1			—			1			3
Income from discontinued operations, net of tax	1			1			1			2			5
Cumulative effect of change in accounting principle, net of tax	(7		)	—			—			—			(7		)
Net income	$	116		$	129		$	139		$	90		$	474
Preferred stock dividends	(1		)	—			(1		)	(1		)	(3		)
Net income available for common stockholders	$	115		$	129		$	138		$	89		$	471
Basic net income per share:
Income from continuing operations	$	0.46		$	0.50		$	0.53		$	0.33		$	1.82
Discontinued operations	0.01			—			—			0.01			0.02
Cumulative effect of change in accounting principle	(0.03		)	—			—			—			(0.03		)
Net income	$	0.44		$	0.50		$	0.53		$	0.34		$	1.81
Dilutive net income per share:
Income from continuing operations	$	0.46		$	0.49		$	0.53		$	0.32		$	1.80
Discontinued operations	0.01			—			—			0.01			0.02
Cumulative effect of change in accounting principle	(0.03		)	—			—			—			(0.03		)
Net income	$	0.44		$	0.49		$	0.53		$	0.33		$	1.79
Dilutive average common and common equivalent shares outstanding	260.5			261.7			262.8			267.0			263.0