Consolidated Statements of Financial Position - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
CURRENT ASSETS
Cash and cash equivalents	$ 756	$ 426
Short-term investments	529	290
Receivables, net	2,478	2,106
Fiduciary assets	9,625	8,959
Other current assets	289	247
Current assets of discontinued operations	0	1,118
Total Current Assets	13,677	13,146
Goodwill	8,358	7,410
Intangible assets, net	1,733	1,890
Fixed assets, net	564	550
Deferred tax assets	389	325
Prepaid pension	1,060	858
Other non-current assets	307	360
Non-current assets of discontinued operations	0	2,076
TOTAL ASSETS	26,088	26,615
CURRENT LIABILITIES
Accounts payable and accrued liabilities	1,961	1,604
Short-term debt and current portion of long-term debt	299	336
Fiduciary liabilities	9,625	8,959
Other current liabilities	870	656
Current liabilities of discontinued operations	0	940
Total Current Liabilities	12,755	12,495
Long-term debt	5,667	5,869
Deferred tax liabilities	127	101
Pension, other postretirement, and postemployment liabilities	1,789	1,760
Other non-current liabilities	1,102	719
Non-current liabilities of discontinued operations	0	139
TOTAL LIABILITIES	21,440	21,083
EQUITY
Ordinary shares - $0.01 nominal value Authorized: 750 shares (issued: 2017 - 247.6; 2016 - 262.0)	2	3
Additional paid-in capital	5,775	5,577
Retained earnings	2,302	3,807
Accumulated other comprehensive loss	(3,496)	(3,912)
TOTAL AON SHAREHOLDERS' EQUITY	4,583	5,475
Noncontrolling interests	65	57
TOTAL EQUITY	4,648	5,532
TOTAL LIABILITIES AND EQUITY	$ 26,088	$ 26,615