v3.23.2

Goodwill - Schedule of Goodwill (Details) - USD ($)	3 Months Ended	12 Months Ended
Goodwill - Schedule of Goodwill (Details) - USD ($)	Dec. 31, 2022	Sep. 30, 2022
Goodwill [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 333,000,000	$ 333,000,000
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	155,000,000	146,000,000
Indefinite-Lived Intangible Assets (Excluding Goodwill), Net	178,000,000	187,000,000
Goodwill [Roll Forward]
Intangible assets, net	1,695,000,000	1,776,000,000
Acquired Technology and Patents [Member]
Goodwill [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)	0	0
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	0	0
Indefinite-Lived Intangible Assets (Excluding Goodwill), Net	0	0
Customer relationships and other intangibles
Goodwill [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)	0	0
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	0	0
Indefinite-Lived Intangible Assets (Excluding Goodwill), Net	0	0
Trademarks and Trade Names [Member]
Goodwill [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)	333,000,000	333,000,000
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	155,000,000	146,000,000
Indefinite-Lived Intangible Assets (Excluding Goodwill), Net	178,000,000	187,000,000
Trademarks and Trade Names [Member]
Goodwill [Roll Forward]
Intangible assets, net	195,000,000	204,000,000
Customer relationships and other intangibles
Goodwill [Roll Forward]
Intangible assets, net	1,368,000,000	1,405,000,000
Acquired Technology and Patents [Member]
Goodwill [Roll Forward]
Intangible assets, net	$ 132,000,000	$ 167,000,000

Indefinite-Lived Intangible Assets (Excluding Goodwill), Net

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Avaya Holdings Corp. 10-Q