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v3.19.2

Segment Information (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2019 USD ($) | Jan. 31, 2019 USD ($) | Oct. 31, 2018 USD ($) | Jul. 31, 2018 USD ($) | Apr. 30, 2018 USD ($) | Jan. 31, 2018 USD ($) | Oct. 31, 2017 USD ($) | Jul. 31, 2017 USD ($) | Apr. 30, 2019 USD ($) Segment | Apr. 30, 2018 USD ($) | Apr. 30, 2017 USD ($)
Segment Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | Segment |  |  |  |  |  |  |  |  | 3 |  |  |  |
Segment Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 491,200 | $ 449,400 | $ 448,600 | $ 410,900 | $ 477,300 | $ 455,700 | $ 451,700 | $ 411,400 | $ 1,800,069 | $ 1,796,103 |  | $ 1,718,530 |
Corporate Expenses |  |  |  |  |  |  |  |  | (168,754) | (183,603) | [1] | (178,531) | [1]
Operating Income | $ 80,100 | $ 50,300 | $ 57,500 | $ 36,100 | $ 72,700 | $ 65,400 | $ 80,800 | $ 12,600 | 223,989 | 231,461 | [1] | 211,470 | [1]
ASU 2017-07 Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Net benefits |  |  |  |  |  |  |  |  | 8,800 | 8,100 |  | (5,300) |
Operating and Administrative Expenses [Member] | ASU 2017-07 Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Net benefits |  |  |  |  |  |  |  |  |  | 8,100 |  |  |
Interest and Other Income [Member] | ASU 2017-07 Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Net benefits |  |  |  |  |  |  |  |  |  |  |  | (5,300) |
Research [Member] | Interest and Other Income [Member] | ASU 2017-07 Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Net benefits |  |  |  |  |  |  |  |  |  | (4,200) |  | (1,600) |
Publishing [Member] | Interest and Other Income [Member] | ASU 2017-07 Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Net benefits |  |  |  |  |  |  |  |  |  | (2,300) |  | (1,200) |
Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 1,800,069 | 1,796,103 | [1] | 1,718,530 | [1]
Contribution to Profit |  |  |  |  |  |  |  |  | 392,743 | 415,064 | [1] | 390,001 | [1]
Operating Segments [Member] | Research [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 937,313 | 934,395 | [1] | 853,489 | [1]
Contribution to Profit |  |  |  |  |  |  |  |  | 258,875 | 271,326 | [1] | 250,648 | [1]
Operating Segments [Member] | Publishing [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 574,192 | 617,648 | [1] | 633,449 | [1]
Contribution to Profit |  |  |  |  |  |  |  |  | 118,901 | 121,639 | [1] | 124,531 | [1]
Operating Segments [Member] | Solutions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 288,564 | 244,060 | [1] | 231,592 | [1]
Contribution to Profit |  |  |  |  |  |  |  |  | $ 14,967 | 22,099 | [1] | 14,822 | [1]
Corporate [Member] | Interest and Other Income [Member] | ASU 2017-07 Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Net benefits |  |  |  |  |  |  |  |  |  | $ (1,600) |  | $ 8,100 |
[1] | Due to the retrospective adoption of ASU 2017-07, total net benefits (costs) of $8.1 million and $(5.3) million related to the non-service components of defined benefit and other post-employment benefit plans were reclassified from Operating and Administrative Expenses to Interest Income and Other for the years ended April 30, 2018 and 2017, respectively. Refer to Note 2, "Summary of Significant Accounting Policies, Recently Issued, and Recently Adopted Accounting Standards," for more information. The impact of the reclassification on Contribution to Profit by segment for the year ended April 30, 2018 was $4.2 million in Research, $2.3 million in Publishing, and $1.6 million in Corporate expenses. The impact of the reclassification on Contribution to Profit by segment for the year ended April 30, 2017 was $1.6 million in Research, $1.2 million in Publishing, and $(8.1) million in Corporate expenses.

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