SEGMENT INFORMATION (Tables)

12 Months Ended

Dec. 31, 2019

Segment Reporting [Abstract]

Financial Information by Segment

The table below shows revenue, Adjusted Operating Income and operating income by reportable segment. Adjusted Operating Income is a financial metric utilized by the Company’s chief operating decision maker to assess the profitability of each reportable segment. Refer to Note 3 for further details on the components of the Company’s revenue.

	Year Ended December 31,
	2019								2018
	MIS		MA		Eliminations		Consolidated		MIS		MA		Eliminations		Consolidated
Revenue	$	3,009	$	1,963	$	(143)	$	4,829	$	2,836	$	1,743	$	(136)	$	4,443
Total Expense	1,376		1,598		(143)		2,831		1,276		1,435		(136)		2,575
Operating income	1,633		365		—		1,998		1,560		308		—		1,868
Add:
Restructuring	31		29		—		60		32		17		—		49
Depreciation and amortization	71		129		—		200		65		127		—		192
Acquisition-Related Expenses	—		3		—		3		—		8		—		8
Loss pursuant to the divestiture of MAKS	—		14		—		14		—		—		—		—
Captive insurance company settlement	10		6		—		16		—		—		—		—
Adjusted Operating Income	$	1,745	$	546	$	—	$	2,291	$	1,657	$	460	$	—	$	2,117

	Year Ended December 31, 2017
	MIS(1)		MA(1)		Eliminations		Consolidated(1)
Revenue	$	2,886	$	1,446	$	(128)	$	4,204
Total Expense	1,314		1,197		(128)		2,383
Operating Income	1,572		249		—		1,821
Add:
Depreciation and amortization	74		84		—		158
Acquisition-Related Expenses	—		23		—		23
Adjusted Operating income	$	1,646	$	356	$	—	$	2,002

⁽¹⁾The Company adopted ASU No. 2017-07 in the first quarter of 2018, whereby all components of pension expense except for the service cost component are required to be presented in non-operating (expense) income, net. The service cost component continues to be reported as an operating expense. Segment results for 2017 have been restated to reflect this reclassification. Accordingly, operating and SG&A expenses for MIS and MA were reduced by $8 million and $4 million, respectively, for the year ended December 31, 2017.

Company's Reportable Segment Revenues Disaggregated by Segment and Geographic Region

CONSOLIDATED REVENUE AND LONG-LIVED ASSETS INFORMATION BY GEOGRAPHIC AREA

	Year Ended December 31,
	2019		2018		2017
Revenue:
U.S.	$	2,544	$	2,330	$	2,348
Non-U.S.:
EMEA	1,446		1,377		1,132
Asia-Pacific	551		493		471
Americas	288		243		253
Total Non-U.S.	2,285		2,113		1,856
Total	$	4,829	$	4,443	$	4,204
Long-lived assets at December 31:
U.S.	$	1,290	$	982	$	673
Non-U.S.	4,678		4,685		5,037
Total	$	5,968	$	5,667	$	5,710