Segment Information (Tables)

6 Months Ended

Jun. 30, 2017

Segment Reporting [Abstract]

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

Revenue from continuing operations for each of the Company’s principal product and service lines is as follows (in millions):

	Three months ended June 30						Six months ended June 30
	2017			2016			2017			2016
Commercial Risk Solutions	$	1,042		$	990		$	2,026		$	1,951
Reinsurance Solutions	344			332			715			703
Retirement Solutions	389			405			775			800
Health Solutions	312			281			684			573
Data & Analytic Services	285			275			553			534
Elimination	(4		)	(1		)	(4		)	(3		)
Total revenue	2,368			2,282			4,749			4,558