Goodwill and Other Intangibles (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the Carrying Amount of Goodwill

Changes in the carrying amount of goodwill are as follows:

September 30,
(In millions)	2018			2017
Balance as of January 1,	$	9,089		$	8,369
Goodwill acquired	410			533
Other adjustments(a)	(64		)	198
Balance at September 30,	$	9,435		$	9,100

^(a) Primarily reflects the impact of foreign exchange.

Amortized Intangible Assets

The gross cost and accumulated amortization at September 30, 2018 and December 31, 2017 are as follows:

	September 30, 2018						December 31, 2017
(In millions)	Gross Cost		Accumulated Amortization		Net Carrying Amount		Gross Cost		Accumulated Amortization		Net Carrying Amount
Client Relationships	$	1,837	$	611	$	1,226	$	1,672	$	518	$	1,154
Other (a)	246		143		103		234		114		120
Amortized intangibles	$	2,083	$	754	$	1,329	$	1,906	$	632	$	1,274

^(a) Primarily non-compete agreements, trade names and developed technology.

Estimated Future Aggregate Amortization Expense

The estimated future aggregate amortization expense is as follows:

For the Years Ending December 31,
(In millions)	Estimated Expense
2018 (excludes amortization through September 30, 2018)	$	51
2019	183
2020	168
2021	157
2022	143
Subsequent years	627
	$	1,329