Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of changes in the net carrying amount of goodwill by operating segment

The changes in the net carrying amount of goodwill for the years ended December 31, 2018 and 2017, respectively, are as follows (in millions):

Balance as of January 1, 2017	$	7,410
Goodwill related to current year acquisitions	619
Goodwill related to disposals	(5		)
Goodwill related to prior year acquisitions	(13		)
Foreign currency translation	347
Balance as of December 31, 2017	$	8,358
Goodwill related to current year acquisitions	38
Goodwill related to disposals	(2		)
Goodwill related to prior year acquisitions	4
Foreign currency translation	(227		)
Balance as of December 31, 2018	$	8,171

Schedule of other intangible assets by asset class

Amortization basis and estimated useful lives by intangible asset type are generally as follows:

Intangible Asset Description	Amortization Basis	Expected Life
Customer-related and contract-based	In line with underlying cash flows	7 to 20 years
Tradenames	Straight-line	1 to 3 years
Technology and other	Straight-line	5 to 7 years

Other intangible assets by asset class are as follows (in millions):

	As of December 31
	2018						2017
	Gross Carrying Amount		Accumulated Amortization and Impairment		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization and Impairment		Net Carrying Amount
Customer related and contract based	2,240		1,444		796		2,550		1,415		1,135
Tradenames	1,027		740		287		1,047		533		514
Technology and other	391		325		66		416		332		84
Total	$	3,658	$	2,509	$	1,149	$	4,013	$	2,280	$	1,733

Schedule of estimated future amortization expense on intangible assets

The estimated future amortization for finite-lived intangible assets as of December 31, 2018 is as follows (in millions):

	Estimated Future Amortization
For the years ended
2019	$	385
2020	219
2021	126
2022	84
2023	72
Thereafter	263
Total	$	1,149