Quarterly Financial Summary (Unaudited) (Details) - USD ($) $ / shares in Units, $ 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
Acquisition and Integration related costs	$ 24,000	$ 7,200	$ 7,600	$ 23,100
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain									$ 43,008	$ 0	$ 0
Cost-method Investments, Other than Temporary Impairment									18,339	0	0
Restructuring related charges	4,100	10,300	9,500	24,000	$ 27,900	$ 19,500	$ 500	$ 2,800	$ 47,869	50,714	67,721
Document Fiscal Year Focus									2020
Start-up costs	200	400		100		6,800	5,900	5,300
Income tax expense (benefit)					(11,300)			(32,100)	$ 60,764	(41,333)	57,433
Loss on extinguishment of debt					(6,200)	(1,800)	(48,800)	(33,400)	0	(90,201)	(928)
Quarterly Financial Summary (Unaudited)
Revenues	787,772	869,073	806,698	775,598	680,882	832,330	884,443	692,670	3,239,141	3,090,325	2,973,536
Gross profit	335,781	368,111	323,582	294,289	266,573	338,363	353,514	236,733	1,321,763	1,195,183	1,146,966
Net income (loss)	$ 50,390	$ 161,356	$ 83,038	$ 39,541	$ 61,517	$ 69,517	$ 32,084	$ (29,993)	$ 334,325	$ 133,125	$ (40,288)
Net (loss) income per share:
Basic	$ 0.44	$ 1.39	$ 0.71	$ 0.33	$ 0.51	$ 0.56	$ 0.26	$ (0.24)	$ 2.86	$ 1.07	$ (0.32)
Diluted	$ 0.43	$ 1.36	$ 0.70	$ 0.33	$ 0.50	$ 0.55	$ 0.25	$ (0.24)	$ 2.80	$ 1.05	$ (0.32)