Condensed Consolidated Statements of Financial Position (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
CURRENT ASSETS
Cash and cash equivalents	$ 295	$ 346
Short-term investments	607	785
Receivables, net	2,745	2,701
Fiduciary assets	10,315	10,063
Other current assets	538	624
Total Current Assets	14,500	14,519
Goodwill	8,835	8,647
Intangible assets, net	3,361	3,611
Fixed assets, net	773	781
Investments	254	312
Other non-current assets	1,022	1,112
TOTAL ASSETS	28,745	28,982
CURRENT LIABILITIES
Fiduciary liabilities	10,315	10,063
Short-term debt and current portion of long-term debt	163	492
Accounts payable and accrued liabilities	1,611	1,810
Other current liabilities	676	584
Total Current Liabilities	12,765	12,949
Long-term debt	4,415	4,014
Pension and other post employment liabilities	1,543	1,896
Other non-current liabilities	1,743	1,817
TOTAL LIABILITIES	20,466	20,676
EQUITY
Common stock-$1 par value Authorized: 750 shares (issued: 2011 - 386.4; 2010 - 385.9)	386	386
Additional paid-in capital	3,975	4,000
Retained earnings	8,377	7,861
Treasury stock at cost (shares: 2011 - 63.1; 2010 - 53.6)	(2,605)	(2,079)
Accumulated other comprehensive loss	(1,900)	(1,917)
TOTAL AON STOCKHOLDERS' EQUITY	8,233	8,251
Noncontrolling interests	46	55
TOTAL EQUITY	8,279	8,306
TOTAL LIABILITIES AND EQUITY	$ 28,745	$ 28,982