
		March 31, 2025						December 31, 2024
	Weighted Average Useful Lives	Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Recorded to Sirius XM Reporting Unit:
Indefinite life intangible assets:
FCC licenses	Indefinite	$	8,610	$	—	$	8,610	$	8,610	$	—	$	8,610
Trademarks	Indefinite	930		—		930		930		—		930
Definite life intangible assets:
Customer relationships	15 years	570		(466)		104		570		(456)		114
OEM relationships	15 years	220		(167)		53		220		(164)		56
Licensing agreements	15 years	285		(249)		36		285		(245)		40
Software and technology	7 years	28		(23)		5		28		(23)		5
Due to Acquisitions recorded to Pandora and Off-platform Reporting Unit:
Indefinite life intangible assets:
Trademarks	Indefinite	312		—		312		312		—		312
Definite life intangible assets:
Customer relationships	8 years	442		(344)		98		442		(331)		111
Software and technology	5 years	391		(381)		10		391		(380)		11
Total intangible assets		$	11,788	$	(1,630)	$	10,158	$	11,788	$	(1,599)	$	10,189

We have identified our Federal Communications Commission (“FCC”) licenses and XM and Pandora trademarks as indefinite life intangible assets after considering the expected use of the assets, the regulatory and economic environment within which they are used and the effects of obsolescence on their use.

We hold FCC licenses to operate our satellite digital audio radio service and provide ancillary services. Each of the FCC licenses authorizes us to use radio spectrum, a reusable resource that does not deplete or exhaust over time.

Our annual impairment assessment of our identifiable indefinite lived intangible assets is performed as of the fourth quarter of each year. An assessment is performed at other times if an event occurs or circumstances change that would more likely than not reduce the fair value of the asset below its carrying value. If the carrying value of the intangible assets exceeds its fair value, an impairment loss is recognized in an amount equal to that excess. As of March 31, 2025, there were no indicators of impairment, and no impairment loss was recognized for intangible assets with indefinite lives during the three months ended March 31, 2025 and 2024.

Amortization expense for all definite life intangible assets was $31 and $38 for the three months ended March 31, 2025, and 2024, respectively. There were no retirements or impairments of definite lived intangible assets during the three months ended March 31, 2025 and 2024.