Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net sales	$ 3,266.3	$ 1,314.9
Operating income (loss)	156.0	125.4
Total assets	33,335.3	15,332.8	$ 33,837.5
Restructuring Costs [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	(13.3)	(17.7)
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	(99.7)	(41.0)
Total assets	1,659.9	11,179.2
Live [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	1,067.8	322.1
Operating income (loss)	57.6	32.0
Total assets	13,034.8	782.2
Learn [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	569.1	384.9
Operating income (loss)	88.2	84.8
Total assets	5,658.4	1,539.7
Work [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	613.7	268.6
Operating income (loss)	62.9	40.5
Total assets	5,283.0	563.8
Play [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	628.0	61.1
Operating income (loss)	56.3	(2.1)
Total assets	4,986.0	468.3
Other [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	387.7	278.2
Operating income (loss)	4.0	28.9
Total assets	$ 2,713.2	$ 799.6