Organization and Presentation (Details) $ / shares in Units, shares in Thousands			1 Months Ended			3 Months Ended
	Nov. 05, 2021 USD ($) shares	Nov. 04, 2021 USD ($)	Mar. 31, 2017 day	Dec. 31, 2015 USD ($) day	Jun. 30, 2015 day	Dec. 31, 2021 USD ($) segment day $ / shares shares	Sep. 30, 2021 USD ($) shares	Jun. 30, 2021 USD ($) shares	Dec. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)	Mar. 13, 2017	Dec. 07, 2015
Debt Instrument [Line Items]
Number of reportable segments | segment						3
Stock price trigger						130.00%
Trading days | day						20
Consecutive trading days | day						30
Current portion of long-term debt						$ 348,669,000	$ 372,999,000
Repayments of convertible debt						28,646,000			$ 0
Aggregate principal amount						$ 889,392,000
Nuance Communications, Inc. | Microsoft Corporation
Debt Instrument [Line Items]
Acquisition cost (in dollars per share) | $ / shares						$ 56.00
Convertible Debentures 1.25% Due 2025
Debt Instrument [Line Items]
Trading days | day			5
Consecutive trading days | day			5
Stated percentage			1.25%			1.25%					1.25%
Shares converted (in shares) | shares						40
Repurchased face amount										$ 87,300,000
Converted amount						$ 1,200,000
Value of common stock consideration						2,200,000
Repayments of convertible debt						1,200,000
Aggregate principal amount						$ 261,400,000
Convertible Debentures 1.0% Due 2035
Debt Instrument [Line Items]
Trading days | day				10
Consecutive trading days | day				5
Stated percentage				1.00%		1.00%						1.00%
Shares converted (in shares) | shares						100	2,100	18,900
Repurchased face amount				$ 472,500,000		$ 2,300,000	$ 89,200,000	$ 457,000,000
Value of common stock consideration						3,000,000	113,800,000	1,002,200,000
Repayments of convertible debt						2,300,000	$ 89,200,000	$ 5,000,000
Aggregate principal amount						128,000,000
Convertible Debentures 1.5% Due 2035
Debt Instrument [Line Items]
Trading days | day					10
Stated percentage					1.50%
Repurchased face amount		$ 25,000,000								$ 36,500,000
Value of common stock consideration						41,900,000
Repayments of convertible debt		$ 100,000
Aggregate principal amount						$ 0
Convertible Debentures 1.5% Due 2035 | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Shares converted (in shares) | shares	800					800	4,100
Repurchased face amount						$ 25,100,000	$ 137,400,000
Value of common stock consideration							223,700,000
Repayments of convertible debt	$ 25,100,000					25,100,000	$ 137,400,000
Aggregate principal amount						$ 0