Segment Reporting - Information and Reconciliation by Segment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 27, 2020	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 29, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 27, 2020	Dec. 29, 2019	Dec. 30, 2018
Segment Reporting Information [Line Items]
Revenues from External Customers	$ 1,722,971	$ 1,776,623	$ 860,279	$ 1,105,570	$ 1,428,007	$ 1,575,173	$ 984,537	$ 732,510	$ 5,465,443	$ 4,720,227	$ 4,579,646
Affiliate Revenue									0	0	0
Operating Profit (Loss)	186,364	$ 336,558	$ 2,175	$ (23,283)	190,380	$ 297,210	$ 128,333	$ 36,127	501,814	652,050	331,052
Depreciation and Amortization									264,975	180,787	167,958
Capital Additions									125,754	133,636	140,426
Total Assets	10,818,385				8,855,628				10,818,385	8,855,628	5,262,988
Corporate and eliminations
Segment Reporting Information [Line Items]
Revenues from External Customers									0	0	0
Affiliate Revenue									(1,215,930)	(1,411,378)	(1,465,620)
Operating Profit (Loss)									(85,481)	36,861	(99,327)
Depreciation and Amortization									70,415	76,051	60,923
Capital Additions									13,902	23,640	20,976
Total Assets	(4,427,840)				(901,580)				(4,427,840)	(901,580)	(3,684,323)
U.S. and Canada | Operating Segments
Segment Reporting Information [Line Items]
Revenues from External Customers									2,556,104	2,449,280	2,375,653
Affiliate Revenue									19,788	11,016	10,242
Operating Profit (Loss)									539,727	415,436	370,197
Depreciation and Amortization									10,304	8,696	11,119
Capital Additions									13,864	6,280	5,255
Total Assets	3,063,421				3,244,950				3,063,421	3,244,950	2,899,986
International | Operating Segments
Segment Reporting Information [Line Items]
Revenues from External Customers									1,578,989	1,836,360	1,847,585
Affiliate Revenue									374	273	290
Operating Profit (Loss)									42,466	107,304	39,470
Depreciation and Amortization									5,151	6,166	6,530
Capital Additions									3,898	4,290	4,652
Total Assets	2,303,696				2,482,170				2,303,696	2,482,170	2,229,053
Entertainment, Licensing and Digital | Operating Segments
Segment Reporting Information [Line Items]
Revenues from External Customers									373,854	434,467	356,299
Affiliate Revenue									962	11,466	15,796
Operating Profit (Loss)									92,957	99,686	29,127
Depreciation and Amortization									7,324	8,342	4,627
Capital Additions									24,040	25,718	26,631
Total Assets	693,782				695,898				693,782	695,898	620,425
eOne | Operating Segments
Segment Reporting Information [Line Items]
Revenues from External Customers									956,496
Affiliate Revenue									975
Operating Profit (Loss)									(79,185)
Depreciation and Amortization									103,664
Capital Additions									4,702
Total Assets	5,784,302								5,784,302
Global Operations | Operating Segments
Segment Reporting Information [Line Items]
Revenues from External Customers									0	120	109
Affiliate Revenue									1,193,831	1,388,623	1,439,292
Operating Profit (Loss)									(8,670)	(7,237)	(8,415)
Depreciation and Amortization									68,117	81,532	84,759
Capital Additions									65,348	73,708	82,912
Total Assets	$ 3,401,024				$ 3,334,190				$ 3,401,024	$ 3,334,190	$ 3,197,847