Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jul. 01, 2017	Oct. 01, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of total debt	$ 9,000,000
Not Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of total debt	9,400,000	$ 8,600,000	$ 8,400,000
Carrying value of total debt	9,000,000	8,200,000	7,800,000
Level 2 | Other long-term liabilities: | Cross-currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:		5,816
Recurring Fair Value Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	330,394	288,384	52,446
Total assets at fair value	341,733	289,808	76,233
Total liabilities at fair value	72,000	45,988	14,497
Recurring Fair Value Measurements | Other current assets | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	223
Recurring Fair Value Measurements | Other current assets | Foreign currency forwards
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	461		873
Recurring Fair Value Measurements | Other current assets | Fuel swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	4,743	717
Recurring Fair Value Measurements | Other assets | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:		707	18,935
Recurring Fair Value Measurements | Other assets | Foreign currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	5,912		3,979
Recurring Fair Value Measurements | Other current liabilities | Foreign currency forwards
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	118	154
Recurring Fair Value Measurements | Other current liabilities | Fuel swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:		6,320	618
Recurring Fair Value Measurements | Other long-term liabilities: | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	22,653	21,390
Recurring Fair Value Measurements | Other long-term liabilities: | Foreign currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	34,114	12,308	10,695
Recurring Fair Value Measurements | Other long-term liabilities: | Cross-currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	15,115	5,816	3,184
Recurring Fair Value Measurements | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	287,203	238,954	9,176
Total assets at fair value	287,203	238,954	9,176
Total liabilities at fair value	0	0	0
Recurring Fair Value Measurements | Level 1 | Other current assets | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	0
Recurring Fair Value Measurements | Level 1 | Other current assets | Foreign currency forwards
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	0		0
Recurring Fair Value Measurements | Level 1 | Other current assets | Fuel swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	0	0
Recurring Fair Value Measurements | Level 1 | Other assets | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:		0	0
Recurring Fair Value Measurements | Level 1 | Other assets | Foreign currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	0		0
Recurring Fair Value Measurements | Level 1 | Other current liabilities | Foreign currency forwards
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	0	0
Recurring Fair Value Measurements | Level 1 | Other current liabilities | Fuel swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:		0	0
Recurring Fair Value Measurements | Level 1 | Other long-term liabilities: | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	0	0
Recurring Fair Value Measurements | Level 1 | Other long-term liabilities: | Foreign currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	0	0	0
Recurring Fair Value Measurements | Level 1 | Other long-term liabilities: | Cross-currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	0	0	0
Recurring Fair Value Measurements | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	43,191	49,430	43,270
Total assets at fair value	54,530	50,854	67,057
Total liabilities at fair value	72,000	45,988	14,497
Recurring Fair Value Measurements | Level 2 | Other current assets | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	223
Recurring Fair Value Measurements | Level 2 | Other current assets | Foreign currency forwards
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	461		873
Recurring Fair Value Measurements | Level 2 | Other current assets | Fuel swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	4,743	717
Recurring Fair Value Measurements | Level 2 | Other assets | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:		707	18,935
Recurring Fair Value Measurements | Level 2 | Other assets | Foreign currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	5,912		3,979
Recurring Fair Value Measurements | Level 2 | Other current liabilities | Foreign currency forwards
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	118	154
Recurring Fair Value Measurements | Level 2 | Other current liabilities | Fuel swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:		6,320	618
Recurring Fair Value Measurements | Level 2 | Other long-term liabilities: | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	22,653	21,390
Recurring Fair Value Measurements | Level 2 | Other long-term liabilities: | Foreign currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	34,114	12,308	10,695
Recurring Fair Value Measurements | Level 2 | Other long-term liabilities: | Cross-currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	15,115		3,184
Recurring Fair Value Measurements | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0	0
Total assets at fair value	0	0	0
Total liabilities at fair value	0	0	0
Recurring Fair Value Measurements | Level 3 | Other current assets | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	0
Recurring Fair Value Measurements | Level 3 | Other current assets | Foreign currency forwards
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	0		0
Recurring Fair Value Measurements | Level 3 | Other current assets | Fuel swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	0	0
Recurring Fair Value Measurements | Level 3 | Other assets | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:		0	0
Recurring Fair Value Measurements | Level 3 | Other assets | Foreign currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets:	0		0
Recurring Fair Value Measurements | Level 3 | Other current liabilities | Foreign currency forwards
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	0	0
Recurring Fair Value Measurements | Level 3 | Other current liabilities | Fuel swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:		0	0
Recurring Fair Value Measurements | Level 3 | Other long-term liabilities: | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	0	0
Recurring Fair Value Measurements | Level 3 | Other long-term liabilities: | Foreign currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	0	0	0
Recurring Fair Value Measurements | Level 3 | Other long-term liabilities: | Cross-currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other long-term liabilities:	$ 0	$ 0	$ 0