Segment Information (Tables)

12 Months Ended

Dec. 31, 2016

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Aon’s total revenue is as follows (in millions):

Years ended December 31	2016			2015			2014
Risk Solutions	$	7,485		$	7,426		$	7,834
HR Solutions	4,183			4,303			4,264
Intersegment eliminations	(41		)	(47		)	(53		)
Total revenue	$	11,627		$	11,682		$	12,045

Fiduciary investment income by segment is as follows (in millions):

Years ended December 31	2016		2015		2014
Risk Solutions	$	22	$	21	$	26
HR Solutions	—		—		—
Total fiduciary investment income	$	22	$	21	$	26

Revenue from External Customers by Products and Services

Commissions, fees and other revenues by product are as follows (in millions):

Years ended December 31	2016			2015			2014
Retail brokerage	$	6,096		$	6,044		$	6,334
Reinsurance brokerage	1,367			1,361			1,474
Total Risk Solutions Segment	7,463			7,405			7,808
Consulting services	1,662			1,686			1,700
Outsourcing	2,557			2,658			2,607
Intrasegment	(36		)	(41		)	(43		)
Total HR Solutions Segment	4,183			4,303			4,264
Intersegment	(41		)	(47		)	(53		)
Total commissions, fees and other revenue	$	11,605		$	11,661		$	12,019

Schedule of reconciliation of segment income before tax to income from continuing operations before income taxes

A reconciliation of segment operating income before tax to income before income taxes is as follows (in millions):

Years ended December 31	2016			2015			2014
Risk Solutions	$	1,587		$	1,506		$	1,648
HR Solutions	557			536			485
Segment income before income taxes	2,144			2,042			2,133
Unallocated expenses	(238		)	(194		)	(167		)
Interest income	9			14			10
Interest expense	(282		)	(273		)	(255		)
Other income	36			100			44
Income before income taxes	$	1,669		$	1,689		$	1,765

Schedule of consolidated revenue by geographic area

Consolidated Revenue by geographic area, which is attributed on the basis of where the services are performed, is as follows (in millions):

Years ended December 31	Total	United States		Americas other than U.S.		United Kingdom		Europe, Middle East, & Africa		Asia Pacific
2016	11,627	$	6,078	$	995	$	1,378	$	1,760	$	1,416
2015	11,682	6,063		1,053		1,527		1,909		1,130
2014	12,045	5,824		1,176		1,623		2,189		1,233

Schedule of consolidated non-current assets by geographic area

Consolidated Non-current assets by geographic area are as follows (in millions):

As of December 31, 2016	Total	United States		Americas other than U.S.		United Kingdom		Europe, Middle East, & Africa		Asia Pacific
Fixed assets, net	765	$	443	$	62	$	65	$	85	$	110
Goodwill, intangible assets and other	12,382	6,947		887		2,091		2,054		403
Total	13,147	7,390		949		2,156		2,139		513

As of December 31, 2015	Total	United States		Americas other than U.S.		United Kingdom		Europe, Middle East, & Africa		Asia Pacific
Fixed assets, net	765	$	432	$	48	$	89	$	89	$	107
Goodwill, intangible assets and other	12,253	6,635		368		2,606		2,181		463
Total	13,018	7,067		416		2,695		2,270		570