Leases (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Sep. 29, 2019	Sep. 30, 2018	Oct. 01, 2017
Leases [Abstract]
Sublease income recognized	$ 10.9	$ 12.3	$ 15.5
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	14,273.5	13,197.1
Accumulated depreciation	7,841.8	7,268.0
Assets Held under Financing Leases [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	122.3	103.2
Accumulated depreciation	17.2	12.7
Restructuring Charges [Member] \| Contract Termination [Member]
Property, Plant and Equipment [Line Items]
Business Exit Costs	$ 55.3	$ 119.3	$ 15.7

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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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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The total amount of sublease rental income recognized during the period that reduces the entity's rent expense incurred under operating leases.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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