Summary of Significant Accounting Policies - Estimated Useful Life of Property Plant and Equipment by Category (Details)	12 Months Ended
	Sep. 26, 2020
Buildings [Member]
Property Plant And Equipment [Line Items]
Estimated useful life of the asset (in years)	40 years
Building and land improvements [Member]
Property Plant And Equipment [Line Items]
Estimated useful life of the asset (in years)	20 years
Transportation equipment [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life of the asset (in years)	3 years
Transportation equipment [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life of the asset (in years)	10 years
Storage facilities [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life of the asset (in years)	7 years
Storage facilities [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life of the asset (in years)	30 years
Office equipment [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life of the asset (in years)	5 years
Office equipment [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life of the asset (in years)	10 years
Tanks and cylinders [Member} | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life of the asset (in years)	10 years
Tanks and cylinders [Member} | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life of the asset (in years)	40 years
Computer software [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life of the asset (in years)	3 years
Computer software [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life of the asset (in years)	7 years