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Commitments and Contingencies and Derivative Financial Instruments - Narrative (Details)
$ in Millions
 12 Months Ended
Sep. 30, 2022
USD ($)
case
Oct. 01, 2021
USD ($)
Loss Contingencies [Line Items]    
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Miscellaneous Miscellaneous
Letter of Credit | $1.6 Billion Revolving Credit Facility    
Loss Contingencies [Line Items]    
Line of credit facility, amount outstanding $ 1.3  
Letter of Credit | Committed And Uncommitted Letter Of Credit Facility    
Loss Contingencies [Line Items]    
Line of credit facility, amount outstanding 279.2  
Line of Credit    
Loss Contingencies [Line Items]    
Letters of credit outstanding 280.5  
Surety Bond    
Loss Contingencies [Line Items]    
Letters of credit outstanding 2,200.0  
Interest Rate Swap    
Loss Contingencies [Line Items]    
Derivative, notional amount $ 748.4  
Interest Rate Swap | Sterling Overnight Interbank Average Rate    
Loss Contingencies [Line Items]    
Derivative, fixed interest rate 0.82%  
Interest Rate Swap | Minimum    
Loss Contingencies [Line Items]    
Derivative, fixed interest rate 0.704%  
Interest Rate Swap | Maximum    
Loss Contingencies [Line Items]    
Derivative, fixed interest rate 1.116%  
Cross Currency Interest Rate Contract    
Loss Contingencies [Line Items]    
Derivative, notional amount $ 127.8  
Cross Currency Interest Rate Contract | LIBOR    
Loss Contingencies [Line Items]    
Derivative, basis spread on variable rate 87.50%  
Cross Currency Interest Rate Contract | Minimum    
Loss Contingencies [Line Items]    
Derivative, fixed interest rate 0.726%  
Term of contract 3 years 6 months  
Cross Currency Interest Rate Contract | Maximum    
Loss Contingencies [Line Items]    
Derivative, fixed interest rate 0.746%  
Term of contract 10 years  
Cross Currency Interest Rate Contract and Interest Rate Swamp    
Loss Contingencies [Line Items]    
Derivative assets (liabilities), at fair value $ 128.2 $ (0.8)
Cross Currency Interest Rate Contract and Interest Rate Swamp | Deferred Long-term Liability Charges    
Loss Contingencies [Line Items]    
Derivative assets (liabilities), at fair value   (11.0)
Cross Currency Interest Rate Contract and Interest Rate Swamp | Total Other Non-current Assets    
Loss Contingencies [Line Items]    
Derivative assets (liabilities), at fair value   10.2
Interest Rate Swap and Cross Currency Interest Rate Contract    
Loss Contingencies [Line Items]    
Unrealized gain (loss) on derivatives 87.5 (7.4)
Foreign Exchange Forward    
Loss Contingencies [Line Items]    
Derivative, notional amount 298.2 506.5
Derivative assets (liabilities), at fair value (3.2) $ 55.5
Derivative settled 66.7  
Foreign Exchange Forward | Total Other Non-current Assets    
Loss Contingencies [Line Items]    
Derivative assets (liabilities), at fair value 2.8  
Foreign Exchange Forward | Other Current Assets    
Loss Contingencies [Line Items]    
Derivative assets (liabilities), at fair value 0.3  
Foreign Exchange Forward | Accrued Liabilities    
Loss Contingencies [Line Items]    
Derivative assets (liabilities), at fair value $ (6.3)  
Foreign Exchange Forward | Minimum    
Loss Contingencies [Line Items]    
Term of contract 1 month  
Foreign Exchange Forward | Maximum    
Loss Contingencies [Line Items]    
Term of contract 16 months  
Treasury Lock    
Loss Contingencies [Line Items]    
Number of instruments held | case 2  
Derivative, notional amount $ 500.0  
Derivative assets (liabilities), at fair value 40.9  
Unrealized gain (loss) on derivatives 30.8  
Aggregate principal amount $ 250.0  
Treasury Lock | First 250 Million    
Loss Contingencies [Line Items]    
Derivative, fixed interest rate 2.769%  
Treasury Lock | Remaining 250 Million    
Loss Contingencies [Line Items]    
Derivative, fixed interest rate 2.672%