Goodwill and Other Intangible Assets, Net - Summary of Goodwill Activity (Detail) $ in Millions	3 Months Ended
Mar. 31, 2017 USD ($)
Goodwill [Line Items]
Beginning balance	$ 10,218.9
Acquisitions	14.1
Other Adjustments	67.7
Impairment	(4.5)
Foreign Currency	24.9
Ending balance	10,321.1
Live [Member] \| Operating Segments [Member]
Goodwill [Line Items]
Beginning balance	3,639.9
Acquisitions	14.1
Other Adjustments	36.3
Foreign Currency	10.3
Ending balance	3,700.6
Learn [Member] \| Operating Segments [Member]
Goodwill [Line Items]
Beginning balance	2,785.4
Other Adjustments	3.3
Foreign Currency	2.1
Ending balance	2,790.8
Work [Member] \| Operating Segments [Member]
Goodwill [Line Items]
Beginning balance	1,871.0
Other Adjustments	22.3
Foreign Currency	9.2
Ending balance	1,902.5
Play [Member] \| Operating Segments [Member]
Goodwill [Line Items]
Beginning balance	1,161.4
Other Adjustments	(2.3)
Foreign Currency	2.2
Ending balance	1,161.3
Other [Member] \| Operating Segments [Member]
Goodwill [Line Items]
Beginning balance	761.2
Other Adjustments	8.1
Impairment	(4.5)
Foreign Currency	1.1
Ending balance	$ 765.9

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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