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v3.26.1

Commitments and Contingencies and Derivative Financial Instruments (Details) $ in Millions |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 13, 2023 USD ($) | Mar. 27, 2026 USD ($) instrument | Mar. 27, 2026 USD ($) instrument | Sep. 26, 2025 USD ($) instrument | Oct. 02, 2020 | Mar. 12, 2026 USD ($) | Jan. 05, 2026 USD ($) | Sep. 30, 2022 USD ($) instrument
Letter of Credit | Total Issued Letters of Credit |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Long-term line of credit, noncurrent |  | $ 253.4 | $ 253.4 | $ 217.0 |  |  |  |
Letter of Credit | Revolving Credit Facility |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Long-term line of credit, noncurrent |  | 0.3 | 0.3 |  |  |  |  |
Letter of Credit | Committed and Uncommitted Letter-of-Credit Facilities |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Long-term line of credit, noncurrent |  | 253.1 | 253.1 |  |  |  |  |
Surety Bond |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Guarantor obligations, carrying value |  | 3,000.0 | 3,000.0 | 2,800.0 |  |  |  |
Treasury Lock |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of instruments held | instrument |  |  |  |  |  |  |  | 2
Derivative notional amount |  |  |  |  |  |  |  | $ 500.0
Gain (loss) on derivatives, before taxes | $ 37.4 |  |  |  |  |  |  |
Unrealized gain (loss) on derivatives included in accumulated other comprehensive income (loss) |  | $ 19.5 | $ 19.5 | $ 20.9 |  |  |  |
Treasury Lock | Fixed Rate Date |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Derivative fixed interest rate (as a percent) | 5.90% |  |  |  |  |  |  |
Aggregate principal amount | $ 500.0 |  |  |  |  |  |  |
Interest Rate Swap |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of instruments held | instrument |  | 1 | 1 | 1 |  |  |  |
Derivative notional amount |  | $ 200.0 | $ 200.0 | $ 200.0 |  |  |  |
Unrealized gain (loss) on derivatives included in accumulated other comprehensive income (loss) |  | 15.2 | $ 15.2 | $ 15.6 |  |  |  |
Term of derivative contract (in years/months) |  |  | 10 years | 10 years |  |  |  |
Derivative assets (liabilities), at fair value |  | 20.0 | $ 20.0 | $ 20.5 |  |  |  |
Interest Rate Swap | Minimum |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Term of derivative contract (in years/months) |  |  |  |  | 5 years |  |  |
Interest Rate Swap | Maximum |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Term of derivative contract (in years/months) |  |  |  |  | 10 years |  |  |
Foreign Exchange Forward |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Derivative notional amount |  | 1,890.0 | 1,890.0 | 491.9 |  | $ 60.1 | $ 1,310.0 |
Gain (loss) on derivatives, before taxes |  | (20.5) | (20.5) |  |  |  |  |
Derivative assets (liabilities), at fair value |  | 2.8 | 2.8 | (0.3) |  |  |  |
Foreign Exchange Forward | Current Assets |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Derivative assets (liabilities), at fair value |  | 4.8 | 4.8 | 2.0 |  |  |  |
Foreign Exchange Forward | Current Liabilities |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Derivative assets (liabilities), at fair value |  | $ (2.0) | $ (2.0) | $ (2.3) |  |  |  |
Foreign Exchange Forward | Minimum |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Term of derivative contract (in years/months) |  |  | 1 month |  |  |  |  |
Foreign Exchange Forward | Maximum |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Term of derivative contract (in years/months) |  |  | 3 months |  |  |  |  |

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