Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets and Goodwill

Other intangible assets and the related accumulated amortization consisted of the following (in millions):

	As of December 31,						Useful Life (Years)
	2018			2017
Customer relationships	$	4,406		$	3,923		3 to 25
Technology	524			461			2.5 to 11
Trading products with finite lives	237			237			20
Data/databases	150			150			4 to 10
Market data provider relationships	11			11			20
Non-compete agreements	39			38			1 to 5
Other	36			33			1 to 5
	5,403			4,853
Less accumulated amortization	(1,532		)	(1,200		)
Total finite-lived intangible assets, net	3,871			3,653
Exchange registrations, licenses and contracts with indefinite lives	6,253			6,243
Trade names and trademarks with indefinite lives	280			280
In-process research and development	49			85
Other	9			8
Total indefinite-lived intangible assets	6,591			6,616
Total other intangible assets, net	$	10,462		$	10,269

The following is a summary of the activity in the goodwill balance (in millions):

Goodwill balance at January 1, 2017	$	12,291
Acquisitions	211
Divestitures	(344		)
Foreign currency translation	63
Other activity, net	(5		)
Goodwill balance at December 31, 2017	12,216
Acquisitions	889
Foreign currency translation	(38		)
Other activity, net	18
Goodwill balance at December 31, 2018	$	13,085

The following is a summary of the activity in the other intangible assets balance (in millions):

Other intangible assets balance at January 1, 2017	$	10,420
Acquisitions	274
Divestitures	(216		)
Foreign currency translation	69
Amortization of other intangible assets	(272		)
Other activity, net	(6		)
Other intangible assets balance at December 31, 2017	10,269
Acquisitions	548
Foreign currency translation	(45		)
Amortization of other intangible assets	(289		)
Other activity, net	(21		)
Other intangible assets balance at December 31, 2018	$	10,462

Schedule of Future Amortization Expense

We expect future amortization expense from the finite-lived intangible assets as of December 31, 2018 to be as follows (in millions):

2019	$	303
2020	264
2021	249
2022	241
2023	141
Thereafter	2,673
	$	3,871