Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 28, 2020	Mar. 30, 2019	Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]
Document Fiscal Year Focus									2020
Payments for Restructuring									$ (18,811)	$ (13,540)
Asset Impairment Charges									1,057	15,901	$ 46,315
Restructuring related charges	$ 4,100	$ 10,300	$ 9,500	$ 24,000	$ 27,900	$ 19,500	$ 500	$ 2,800	47,869	50,714	67,721
Restructuring obligations	1,998				8,614				1,998	8,614	8,687
Transfer to right-of-use asset									(1,248)
Restructuring Reserve, Non-Cash Activity									$ (34,426)	(37,247)
Document Period End Date									Mar. 28, 2020
Accelerated depreciation
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring									$ 0	0
Restructuring related charges									26,061	37,247
Restructuring obligations	0				0				0	0	0
Transfer to right-of-use asset									0
Restructuring Reserve, Non-Cash Activity									(26,061)	(37,247)
Business combination
Restructuring Cost and Reserve [Line Items]
Restructuring related charges									300	1,300	2,700
One-time termination benefits
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring									(11,549)	(11,968)
Restructuring related charges									6,289	12,826	19,232
Restructuring obligations	1,728				6,988				1,728	6,988	6,130
Transfer to right-of-use asset									0
Restructuring Reserve, Non-Cash Activity									0	0
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring									(7,262)	(1,572)
Restructuring related charges									15,519	641	2,174
Restructuring obligations	270				$ 1,626				270	1,626	2,557
Transfer to right-of-use asset									(1,248)
Restructuring Reserve, Non-Cash Activity									(8,365)	0
Impairment charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring related charges											46,315
Accelerated Depreciation and Impairment Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring related charges										37,247
Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring related charges									34,426	21,346	0
Cost of sales | Accelerated depreciation
Restructuring Cost and Reserve [Line Items]
Restructuring related charges									26,061
Cost of sales | One-time termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring related charges									0	0	0
Cost of sales | Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring related charges									8,365	0	0
Cost of sales | Impairment charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring related charges											0
Cost of sales | Accelerated Depreciation and Impairment Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring related charges										21,346
Other operating expense
Restructuring Cost and Reserve [Line Items]
Restructuring related charges									13,443	29,368	67,721
Other operating expense | Accelerated depreciation
Restructuring Cost and Reserve [Line Items]
Restructuring related charges									0
Other operating expense | One-time termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring related charges									6,289	12,826	19,232
Other operating expense | Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring related charges									7,154	641	2,174
Other operating expense | Impairment charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring related charges											$ 46,315
Other operating expense | Accelerated Depreciation and Impairment Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring related charges										$ 15,901
Fiscal Year 2019
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	92,000								92,000
Fiscal Year 2019 | Accelerated depreciation
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	47,400								47,400
Fiscal Year 2019 | One-time termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	13,700								13,700
Restructuring and Related Cost, Expected Cost Remaining	1,000								1,000
Fiscal Year 2019 | Other restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	15,000								15,000
Fiscal Year 2019 | Impairment charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	15,900								15,900
Fiscal Year 2018 | One-time termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	23,500								23,500
Fiscal Year 2018 | Other restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	200								200
Fiscal Year 2018 | Impairment charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	$ 46,300								$ 46,300