Acquisitions and Divestitures Definite-lived intangible assets acquired (Details) - USD ($) $ in Millions	Apr. 01, 2018	Oct. 01, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 1,277.0	$ 409.0
Accumulated amortization	277.5	194.8
Net carrying amount	999.5	214.2
Acquired and reacquired rights
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,174.5	328.8
Accumulated amortization	232.1	154.2
Net carrying amount	$ 942.4	$ 174.6

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.

No definition available.

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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