Leases - Summary of Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Oct. 01, 2019
Right of use assets
Other assets	$ 479,704	$ 526,281
Lease liabilities
Accrued expenses and other	97,147
Other long-term liabilities	424,348
Total lease liabilities	$ 521,495	$ 562,100
Weighted-average remaining lease term	6 years 10 months 2 days
Weighted-average discount rate	3.68%
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent