Goodwill and Other Intangibles (Tables)

9 Months Ended

Sep. 30, 2020

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)	2020		2019
Balance as of January 1,	$	14,671	$	9,599
Goodwill acquired	462		4,962
Other adjustments(a)	(99)		(275)
Balance at September 30,	$	15,034	$	14,286

(a) Primarily reflects the impact of foreign exchange and dispositions.

Amortized Intangible Assets

The gross cost and accumulated amortization of identified intangible assets at September 30, 2020 and December 31, 2019 are as follows:

	September 30, 2020						December 31, 2019
(In millions)	Gross Cost		Accumulated Amortization		Net Carrying Amount		Gross Cost		Accumulated Amortization		Net Carrying Amount
Client Relationships	$	3,644	$	1,095	$	2,549	$	3,494	$	897	$	2,597
Other (a)	381		219		162		380		203		177
Amortized intangibles	$	4,025	$	1,314	$	2,711	$	3,874	$	1,100	$	2,774

(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
2020 (excludes amortization through September 30, 2020)	$	92
2021	351
2022	323
2023	299
2024	286
Subsequent years	1,360
	$	2,711