Goodwill and Other Intangibles (Tables)

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the Carrying Amount of Goodwill

Changes in the carrying amount of goodwill are as follows:

March 31,
(In millions)	2019		2018
Balance as of January 1,	$	9,599	$	9,089
Goodwill acquired	97		15
Other adjustments(a)	43		90
Balance at March 31,	$	9,739	$	9,194

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

Amortized Intangible Assets

The gross cost and accumulated amortization at March 31, 2019 and December 31, 2018 are as follows:

	March 31, 2019						December 31, 2018
(In millions)	Gross Cost		Accumulated Amortization		Net Carrying Amount		Gross Cost		Accumulated Amortization		Net Carrying Amount
Client Relationships	$	2,046	$	685	$	1,361	$	1,970	$	639	$	1,331
Other (a)	267		164		103		259		153		106
Amortized intangibles	$	2,313	$	849	$	1,464	$	2,229	$	792	$	1,437

^(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
2019 (excludes amortization through March 31, 2019)	$	151
2020	187
2021	174
2022	159
2023	156
Subsequent years	637
	$	1,464