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Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Changes in carrying amount
Balance, beginning of period	$ 1,285,864,000
Additions	0
Impairments	0	$ 0
Currency translation adjustments	17,311,000
Adjustments to prior acquisitions	0
Balance, end of period	1,303,175,000
U.S. Higher Education
Changes in carrying amount
Balance, beginning of period	632,075,000
Additions	0
Impairments	0
Currency translation adjustments	0
Adjustments to prior acquisitions	0
Balance, end of period	632,075,000
Australia / New Zealand
Changes in carrying amount
Balance, beginning of period	553,789,000
Additions	0
Impairments	0
Currency translation adjustments	17,311,000
Adjustments to prior acquisitions	0
Balance, end of period	571,100,000
Education Technology Services
Changes in carrying amount
Balance, beginning of period	100,000,000
Additions	0
Impairments	0
Currency translation adjustments	0
Adjustments to prior acquisitions	0
Balance, end of period	$ 100,000,000

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