(in millions)	Remaining Weighted- Average Estimated Useful Life		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
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

At December 31, 2019
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		4.8		283		135		148
Investor/customer relationships		9.2		476		39		437
Technology-related		7.4		203		9		194
Trade names/trademarks		3.3		14		2		12
Total finite-lived intangible assets		7.8		976		185		791
Total intangible assets			$	18,554	$	185	$	18,369

The impairment tests performed for intangible assets as of July 31, 2020, 2019 and 2018 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 2019, in connection with the eFront Transaction, the Company acquired $400 million of finite-lived customer relationships, $203 million of finite-lived technology-related intangible assets and $14 million of a finite-lived trade name, with weighted-average estimated lives of approximately 10 years, eight years and four years, respectively. See Note 3, Acquisition, for information on the eFront Transaction.