Acquisitions (Details) $ in Millions	3 Months Ended
Dec. 25, 2020 USD ($) item	Dec. 27, 2019 USD ($) item
Acquisitions
Net cash paid	$ 107	$ 115
2021 Acquisitions
Acquisitions
Number of businesses acquired \| item	1
Net cash paid	$ 106
2020 Acquisitions
Acquisitions
Number of businesses acquired \| item		2
Net cash paid		$ 112

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration