(Components of Long-Term Debt Including Associated Interest Rates and Related Fair Values) (Details) - USD ($) $ in Millions	Jun. 27, 2021	Sep. 27, 2020
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 14,716.7	$ 16,006.4
Long-term Debt, Fair Value	16,029.8	17,498.7
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	(123.0)	(132.5)
Hedging Liabilities, Noncurrent	24.4	35.6
Long-term Debt	14,618.1	15,909.5
2017 3-Year Two Point Two Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 0.0	500.0
Stated Interest Rate	2.20%
Debt Instrument, Interest Rate, Effective Percentage	2.228%
2017 3-Year Two Point Two Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 0.0	501.5
2016 5-Year Two Point One Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 0.0	500.0
Stated Interest Rate	2.10%
Debt Instrument, Interest Rate, Effective Percentage	2.293%
Debt Instrument, Face Amount from Reopening of Previous Issuance	$ 0.0	250.0
Debt Instrument, Interest Rate, Effective Percentage for Reopening of Previous Issuance	1.60%
2016 5-Year Two Point One Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 0.0	502.3
Debt Instrument, Fair Value Disclosure for Reopening of Previous Issuance	0.0	251.1
2020 2-Year One Point Three Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500.0	500.0
Stated Interest Rate	1.30%
Debt Instrument, Interest Rate, Effective Percentage	1.334%
2020 2-Year One Point Three Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 504.6	506.5
2015 7-Year Two Point Seven Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500.0	500.0
Stated Interest Rate	2.70%
Debt Instrument, Interest Rate, Effective Percentage	2.819%
2015 7-Year Two Point Seven Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 510.1	517.5
2018 5-Year Three Point One Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,000.0	1,000.0
Stated Interest Rate	3.10%
Debt Instrument, Interest Rate, Effective Percentage	3.107%
2018 5-Year Three Point One Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 1,043.1	1,058.8
2013 10-Year Three Point Eight Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 750.0	750.0
Stated Interest Rate	3.85%
Debt Instrument, Interest Rate, Effective Percentage	2.859%
2013 10-Year Three Point Eight Five Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 801.0	817.5
2017 7-Year PointThreeSevenTwoPercentageYenDenominatedSeniorNotes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 766.7	806.4
Stated Interest Rate	0.372%
Debt Instrument, Interest Rate, Effective Percentage	0.462%
2017 7-Year PointThreeSevenTwoPercentageYenDenominatedSeniorNotes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 768.0	794.4
2018 7-Year Three Point Eight Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,250.0	1,250.0
Stated Interest Rate	3.80%
Debt Instrument, Interest Rate, Effective Percentage	3.721%
2018 7-Year Three Point Eight Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 1,382.7	1,414.5
2016 10-Year Two Point Four Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500.0	500.0
Stated Interest Rate	2.45%
Debt Instrument, Interest Rate, Effective Percentage	2.511%
2016 10-Year Two Point Four Five Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 526.6	542.6
2020 7-Year Two Point Zero Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500.0	500.0
Stated Interest Rate	2.00%
Debt Instrument, Interest Rate, Effective Percentage	2.058%
2020 7-Year Two Point Zero Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 513.9	528.9
2018 10-Year Three Point Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 600.0	600.0
Stated Interest Rate	3.50%
Debt Instrument, Interest Rate, Effective Percentage	3.529%
2018 10-Year Three Point Five Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 670.0	679.5
2018 10-Year Four Point Zero Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 750.0	750.0
Stated Interest Rate	4.00%
Debt Instrument, Interest Rate, Effective Percentage	3.958%
2018 10-Year Four Point Zero Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 862.7	886.0
2019 10-Year Three Point Five Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,000.0	1,000.0
Stated Interest Rate	3.55%
Debt Instrument, Interest Rate, Effective Percentage	3.84%
2019 10-Year Three Point Five Five Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 1,115.5	1,147.1
2020 10-Year Two Point Two Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 750.0	750.0
Stated Interest Rate	2.25%
Debt Instrument, Interest Rate, Effective Percentage	3.084%
2020 10-Year Two Point Two Five Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 757.0	778.0
2020 10-Year Two Point Five Five Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,250.0	1,250.0
Stated Interest Rate	2.55%
Debt Instrument, Interest Rate, Effective Percentage	2.582%
2020 10-Year Two Point Five Five Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 1,295.1	1,325.9
2015 30-Year Four Point Three Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 350.0	350.0
Stated Interest Rate	4.30%
Debt Instrument, Interest Rate, Effective Percentage	4.348%
2015 30-Year Four Point Three Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 410.0	412.4
2017 30-Year Three Point Seven Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500.0	500.0
Stated Interest Rate	3.75%
Debt Instrument, Interest Rate, Effective Percentage	3.765%
2017 30-Year Three Point Seven Five Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 550.2	546.6
2018 30-Year Four Point Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,000.0	1,000.0
Stated Interest Rate	4.50%
Debt Instrument, Interest Rate, Effective Percentage	4.504%
2018 30-Year Four Point Five Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 1,237.5	1,222.8
2019 30-Year Four Point Four Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,000.0	1,000.0
Stated Interest Rate	4.45%
Debt Instrument, Interest Rate, Effective Percentage	4.447%
2019 30-Year Four Point Four Five Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 1,236.1	1,215.5
2020 30-Year Three Point Three Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500.0	500.0
Stated Interest Rate	3.35%
Debt Instrument, Interest Rate, Effective Percentage	3.362%
2020 30-Year Three Point Three Five Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 517.7	517.1
2020 30-Year Three Point Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,250.0	1,250.0
Stated Interest Rate	3.50%
Debt Instrument, Interest Rate, Effective Percentage	3.528%
2020 30-Year Three Point Five Percentage Senior Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	$ 1,328.0	$ 1,332.2

Face (par) amount of debt instrument from reopening of previous debt issuance.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable related to reopening of previous debt issuance.

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No definition available.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium related to reopening of previous issuance.

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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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Face (par) amount of debt instrument at time of issuance.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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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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Fair value of liability arising from a financial instrument or contract used to mitigate a specified risk (hedge), expected to be settled after one year or beyond the normal operating cycle, if longer.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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