Goodwill and Other Intangibles (Tables)

6 Months Ended

Jun. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the Carrying Amount of Goodwill

Changes in the carrying amount of goodwill are as follows:

June 30,
(In millions)	2021		2020
Balance as of January 1,	$	15,517	$	14,671
Goodwill acquired	338		466
Other adjustments(a)	(80)		(340)
Balance at June 30,	$	15,775	$	14,797

(a) Primarily reflects the impact of foreign exchange.

Amortized Intangible Assets

The gross cost and accumulated amortization of identified intangible assets at June 30, 2021 and December 31, 2020 are as follows:

	June 30, 2021						December 31, 2020
(In millions)	Gross Cost		Accumulated Amortization		Net Carrying Amount		Gross Cost		Accumulated Amortization		Net Carrying Amount
Client relationships	$	3,882	$	1,320	$	2,562	$	3,713	$	1,170	$	2,543
Other (a)	407		252		155		386		230		156
Amortized intangibles	$	4,289	$	1,572	$	2,717	$	4,099	$	1,400	$	2,699

(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
2021 (excludes amortization through June 30, 2021)	$	182
2022	337
2023	309
2024	289
2025	251
Subsequent years	1,349
	$	2,717