Goodwill and Intangible Assets - Narrative (Details) - USD ($)	1 Months Ended	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 27, 2020	Jun. 27, 2021	Jun. 30, 2020	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020	Sep. 27, 2020	Jun. 29, 2020
Goodwill [Line Items]
Impairment of goodwill							$ 0
Carrying value	$ 2,378,558,000	$ 2,510,921,000			$ 2,510,921,000		2,378,558,000
Goodwill	993,498,000	1,051,796,000			1,051,796,000		993,498,000
Amortization expense		2,200,000		$ 2,600,000	7,800,000	$ 9,000,000.0
Australia
Goodwill [Line Items]
Percentage negative growth			7.00%
All reporting units excluding ASP
Goodwill [Line Items]
Percentage of excess of fair value over carrying value								80.00%
ASP
Goodwill [Line Items]
Impairment of goodwill	15,800,000
Carrying value	144,900,000						144,900,000
Goodwill	95,500,000						95,500,000
GSG
Goodwill [Line Items]
Gross amounts of goodwill	534,000,000.0	559,000,000.0			559,000,000.0		534,000,000.0
Accumulated impairment	17,700,000	17,700,000			17,700,000		17,700,000
Goodwill	516,315,000	541,305,000			541,305,000		516,315,000
CIG
Goodwill [Line Items]
Gross amounts of goodwill	598,700,000	632,000,000.0			632,000,000.0		598,700,000
Accumulated impairment	121,500,000	121,500,000			121,500,000		121,500,000
Goodwill	$ 477,183,000	$ 510,491,000			$ 510,491,000		$ 477,183,000
CIG | ASP
Goodwill [Line Items]
Percentage of excess of fair value over carrying value								20.00%