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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after accumulated amortization, of debt discount (premium).

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Amount of long-term debt and lease obligation, classified as noncurrent.

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Amount of long-term debt and lease obligation, classified as current.

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Amount of long-term debt and lease obligation, including portion classified as current.

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Debt - Schedule of Long-term Debt Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 09, 2021	Oct. 01, 2020	Sep. 30, 2020
Debt Instrument [Line Items]
Long-term debt	$ 7,360,000			$ 4,560,000
Finance lease obligations	18,844			8,631
Total long-term debt	7,378,844			4,568,631
Less:
Original issue discount on unsecured senior notes and debentures	2,920			583
Debt issuance cost	46,977			36,104
Current maturities	200,442			165
Long-term debt, noncurrent	$ 7,128,505			4,531,779
Unsecured 0.625% Senior Notes, due 2023
Debt Instrument [Line Items]
Interest rate	0.625%	0.625%
Long-term debt	$ 1,100,000			0
Unsecured 3.00% Senior Notes, due 2027
Debt Instrument [Line Items]
Interest rate	3.00%
Long-term debt	$ 500,000			500,000
Unsecured 2.625% Senior Notes, due 2029
Debt Instrument [Line Items]
Interest rate	2.625%
Long-term debt	$ 300,000			300,000
Unsecured 1.50% Senior Notes, due 2031
Debt Instrument [Line Items]
Interest rate	1.50%		1.50%
Long-term debt	$ 600,000			0
Unsecured 5.95% Senior Notes, due 2034
Debt Instrument [Line Items]
Interest rate	5.95%
Long-term debt	$ 200,000			200,000
Unsecured 5.50% Senior Notes, due 2041
Debt Instrument [Line Items]
Interest rate	5.50%
Long-term debt	$ 400,000			400,000
Unsecured 4.15% Senior Notes, due 2043
Debt Instrument [Line Items]
Interest rate	4.15%
Long-term debt	$ 500,000			500,000
Unsecured 4.125% Senior Notes, due 2044
Debt Instrument [Line Items]
Interest rate	4.125%
Long-term debt	$ 750,000			750,000
Unsecured 4.30% Senior Notes, due 2048
Debt Instrument [Line Items]
Interest rate	4.30%
Long-term debt	$ 600,000			600,000
Unsecured 4.125% Senior Notes, due 2049
Debt Instrument [Line Items]
Interest rate	4.125%
Long-term debt	$ 450,000			450,000
Unsecured 3.375% Senior Notes, due 2049
Debt Instrument [Line Items]
Interest rate	3.375%
Long-term debt	$ 500,000			500,000
Floating-rate term loan, due April 2022
Debt Instrument [Line Items]
Long-term debt	200,000			200,000
Floating-rate Senior Notes, due 2023
Debt Instrument [Line Items]
Long-term debt	$ 1,100,000			0
Medium-term note Series A, 1995-1, 6.67%, due 2025
Debt Instrument [Line Items]
Interest rate	6.67%
Long-term debt	$ 10,000			10,000
Unsecured 6.75% Debentures, due 2028
Debt Instrument [Line Items]
Interest rate	6.75%
Long-term debt	$ 150,000			$ 150,000