For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Segment Information - Additional Information (Detail)	12 Months Ended
Segment Information - Additional Information (Detail)	Oct. 02, 2020 country cancer_center	Oct. 02, 2020 specialty_hospital country	Oct. 02, 2020 segment country	Oct. 02, 2020 country	Sep. 27, 2019 country	Sep. 28, 2018 country
Segment Reporting Information [Line Items]
Number of reportable segments \| segment			2
Number of multi-disciplinary cancer centers	13	13
Revenues \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Number of countries outside the U.S. representing at least 10% \| country	0	0	0	0	0	0
India
Segment Reporting Information [Line Items]
Number of specialty hospitals		1
India \| Property, plant and equipment, net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk (percent)				13.00%	12.00%
Sri Lanka
Segment Reporting Information [Line Items]
Number of multi-disciplinary cancer centers		1