Business Overview - Additional Information (Details)		6 Months Ended
	Oct. 01, 2019	Mar. 31, 2021
Business Overview [Line Items]
Entity incorporation state country code		DE
Entity incorporation, date of incorporation		Oct. 01, 2019
Nuance Communications | Spin-Off
Business Overview [Line Items]
Distribution date	Oct. 01, 2019
Conversion ratio, description		The distribution was made in the amount of one share of our common stock for every eight shares of Nuance common stock (which we refer to as the “Distribution”) owned by Nuance’s stockholders as of 5:00 p.m. Eastern Time on September 17, 2019, the record date of the Distribution.
Conversion ratio	0.125