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Revenue - Additional Information (Detail) $ in Millions |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 26, 2022 USD ($) customers | Mar. 26, 2022 USD ($) customers | Mar. 27, 2021 USD ($) customers | Mar. 26, 2022 USD ($) customers | Mar. 26, 2022 USD ($) customers | Mar. 27, 2021 customers | Sep. 25, 2021 USD ($) customers | Sep. 26, 2020 USD ($)
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |
Revenue Remaining Performance Obligation | $ | $ 5,200.0 | $ 5,200.0 |  | $ 5,200.0 | $ 5,200.0 |  | $ 5,400.0 |
Agreement terms |  | 25 of Walmart’s 42 regional distribution centers |  |  |  |  | 25 of Walmart’s 42 regional distribution centers |
Contract with Customer, Liability, Revenue Recognized | $ |  | $ 140.6 | $ 3.0 |  |  |  | $ 120.3 | $ 72.6
Revenue Benchmark [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |
Entity wide revenue major customers | customers |  | 1 | 1 |  | 1 | 3 |  |
Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |
Entity wide accounts receivable major customers | customers | 2 | 2 |  | 2 | 2 |  | 4 |
Major Customers [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |
Concentration risk percentage |  | 92.00% | 77.00% |  | 90.00% | 89.00% |  |
Major Customers [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |
Concentration risk percentage | 98.00% |  |  | 100.00% |  |  |  |
Major Customer One [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  | 65.00% |  |
Major Customer One [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |
Concentration risk percentage | 65.00% |  |  | 97.00% |  |  |  |
Major Customer Two [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  | 13.00% |  |
Major Customer Two [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |
Concentration risk percentage | 33.00% |  |  | 1.00% |  |  |  |
Major Customer Three [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  | 11.00% |  |
Major Customer Three [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  | 1.00% |  |  |  |
Major Customer Four [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  | 1.00% |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-09-26 |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |
Revenue Remaining Performance Obligation Percentage | 12.00% | 12.00% |  | 12.00% | 12.00% |  | 8.00% |
Revenue Remaining Performance Obligation Period | 12 months | 12 months |  | 12 months | 12 months |  | 12 months |
Upto Fiscal Year Two Thousand And Twenty Five [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-09-26 |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |
Revenue Remaining Performance Obligation Percentage | 46.00% | 46.00% |  | 46.00% | 46.00% |  | 53.00% |
Revenue Remaining Performance Obligation Period | 3 years | 3 years |  | 3 years | 3 years |  | 4 years |
After Fiscal Year Two Thousand And Twenty Five Till Fiscal Year Two Thousand And Twenty Eight [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-09-26 |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |
Revenue Remaining Performance Obligation Percentage | 42.00% | 42.00% |  | 42.00% | 42.00% |  | 39.00% |
Revenue Remaining Performance Obligation Period | 5 years | 5 years |  | 5 years | 5 years |  | 7 years |

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