(in millions)	Remaining Weighted- Average Estimated Useful Life		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
At December 31, 2021
Indefinite-lived intangible assets:
Management contracts	N/A		$	16,169	$	—	$	16,169
Trade names/trademarks	N/A			1,403		—		1,403
License	N/A			6		—		6
Total indefinite-lived intangible assets				17,578		—		17,578
Finite-lived intangible assets:
Management contracts		3.5		244		169		75
Investor/customer relationships		8.0		746		169		577
Technology-related		4.1		261		49		212
Trade names/trademarks		3.0		23		12		11
Total finite-lived intangible assets		6.6		1,274		399		875
Total intangible assets			$	18,852	$	399	$	18,453

At December 31, 2020
Indefinite-lived intangible assets:
Management contracts	N/A		$	16,169	$	—	$	16,169
Trade names/trademarks	N/A			1,403		—		1,403
License	N/A			6		—		6
Total indefinite-lived intangible assets				17,578		—		17,578
Finite-lived intangible assets:
Management contracts		4.0		283		172		111
Investor/customer relationships		8.2		476		88		388
Technology-related		6.4		203		25		178
Trade names/trademarks		2.3		14		6		8
Total finite-lived intangible assets		7.0		976		291		685
Total intangible assets			$	18,554	$	291	$	18,263

The impairment tests performed for intangible assets as of July 31, 2021, 2020 and 2019 indicated no impairment charges were required.

Estimated amortization expense for finite-lived intangible assets for each of the five succeeding years is as follows:

In 2021, in connection with the Aperio Transaction, the Company acquired $270 million of finite-lived customer relationships, $9 million of finite-lived trade name and $8 million of finite-lived technology-related intangible assets, with weighted-average estimated lives of approximately 10 years, five years and three years, respectively. See Note 3, Acquisitions, for information on the Aperio Transaction.