Segment Reporting (Reconciliation Of Total Segment Operating Income To Consolidated Earnings Before Income Taxes) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	24 Months Ended	36 Months Ended
Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2019	Apr. 01, 2018	Sep. 30, 2018	Sep. 29, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income/(loss)	$ 857.7	$ 772.5	$ 1,873.4	$ 1,888.6
Income Tax Expense (Benefit)	161.2	155.8	366.4	911.6
Gain (Loss) on Disposition of Business	21.0	(4.9)	21.0	496.3
Gain resulting from acquisition of joint venture	0.0	47.6	0.0	1,373.9
Interest income and other, net	15.2	35.5	39.9	123.7
Interest expense	(73.9)	(35.1)	(148.9)	(61.0)
Earnings before income taxes	820.0	815.6	1,785.4	3,821.5
Contract Termination [Member] \| Restructuring Charges [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Business Exit Costs	$ 20.5	$ 100.9	$ 29.0	$ 117.5	$ 135.0
Scenario, Forecast [Member] \| Contract Termination [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Business Exit Costs						$ 202.5

In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

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Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The amount of interest income and other income recognized during the period. Included in this element is interest derived from investments in debt securities, cash and cash equivalents, and other investments which reflect the time value of money or transactions in which the payments are for the use or forbearance of money and other income from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business).

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Amount of the cost of borrowed funds accounted for as interest expense.

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The net result for the period of deducting operating expenses from operating revenues.

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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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