Goodwill and Intangible Assets, Goodwill (Details) - USD ($) $ in Thousands		3 Months Ended
		Jul. 31, 2022	Apr. 30, 2022
Activity in Goodwill by Segment [Roll Forward]
Balance, beginning of period	[1]	$ 1,302,142
Foreign translation adjustment		(12,900)
Balance, end of period		1,289,242
Research [Member]
Activity in Goodwill by Segment [Roll Forward]
Balance, beginning of period	[1]	610,416
Foreign translation adjustment	[1]	(9,530)
Balance, end of period	[1]	600,886
Academic & Professional Learning [Member]
Activity in Goodwill by Segment [Roll Forward]
Balance, beginning of period	[1]	498,136
Foreign translation adjustment		(3,108)
Balance, end of period		495,028
Education Services [Member]
Activity in Goodwill by Segment [Roll Forward]
Balance, beginning of period	[2]	193,590
Foreign translation adjustment	[2]	(262)
Balance, end of period	[2]	$ 193,328
Cumulative pretax noncash goodwill impairment			$ 110,000

[1] The Research segment was previously referred to as Research Publishing & Platforms.

[2] The Education Services goodwill balance as of April 30, 2022 includes a cumulative pretax noncash goodwill impairment of $110.0 million.