Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 3,017.4	$ 3,266.3
Operating income (loss)	117.1	154.0
Total assets	33,469.4		$ 33,135.5
Restructuring Costs [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	(7.9)	(13.3)
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	(63.8)	(102.3)
Total assets	1,242.9
Live [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	1,071.6	1,067.8
Operating income (loss)	8.6	58.3
Total assets	13,911.6
Learn [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	495.4	569.1
Operating income (loss)	50.0	88.6
Total assets	5,690.9
Work [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	640.7	613.7
Operating income (loss)	63.3	62.6
Total assets	5,432.5
Play [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	616.8	628.0
Operating income (loss)	54.4	56.1
Total assets	5,008.3
Other [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	192.9	387.7
Operating income (loss)	12.5	$ 4.0
Total assets	$ 2,183.2