Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net sales	[1],[2]	$ 14,742.2	$ 13,264.0	$ 5,915.7
Operating income (loss)		1,225.7	1,100.1	601.4
Total assets		33,135.5	33,837.5
Capital expenditures				210.2
Capital expenditures		406.2	441.4	211.4
Depreciation and amortization				170.1
Depreciation and amortization		635.6	437.2	171.6
Restructuring Costs [Member]
Segment Reporting Information [Line Items]
Operating income (loss)		(111.9)	(74.9)	(77.2)
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income (loss)		(436.0)	(362.3)	(231.7)
Total assets		1,113.3	1,088.7
Capital expenditures				58.7
Capital expenditures		73.1	72.6
Depreciation and amortization				52.3
Depreciation and amortization		105.2	43.2
Live [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales		5,553.5	4,575.1	1,416.5
Operating income (loss)		571.6	475.7	182.3
Total assets		13,969.8	13,109.5
Capital expenditures				47.7
Capital expenditures		107.3	99.6
Depreciation and amortization				24.6
Depreciation and amortization		150.4	98.6
Learn [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales		2,773.9	2,539.4	1,792.9
Operating income (loss)		511.1	540.5	435.2
Total assets		5,699.5	5,584.5
Capital expenditures				39.5
Capital expenditures		76.7	80.0
Depreciation and amortization				23.9
Depreciation and amortization		123.4	84.6
Work [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales		2,794.8	2,369.2	1,186.4
Operating income (loss)		415.0	297.5	125.8
Total assets		5,344.0	5,226.5
Capital expenditures				36.2
Capital expenditures		73.7	103.6
Depreciation and amortization				25.4
Depreciation and amortization		113.5	82.8
Play [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales		2,583.9	1,871.1	293.5
Operating income (loss)		264.9	41.3	30.7
Total assets		4,813.3	4,840.6
Capital expenditures				5.4
Capital expenditures		26.3	33.5
Depreciation and amortization				21.8
Depreciation and amortization		70.2	54.8
Other [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales		1,036.1	1,909.2	1,226.4
Operating income (loss)		11.0	182.3	136.3
Total assets		2,195.6	3,987.7
Capital expenditures				22.7
Capital expenditures		49.1	52.1
Depreciation and amortization				$ 22.1
Depreciation and amortization		$ 72.9	$ 73.2

[1] All intercompany transactions have been eliminated. Sales to Walmart Inc. and subsidiaries amounted to approximately 13.7%, 13.5% and 10.9% of consolidated net sales in 2017, 2016 and 2015, respectively, substantially across all segments.

[2] Geographic sales information is based on the region from which the products are shipped and invoiced. Long-lived assets by geography are not presented because it is impracticable to do so.