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Leases - Narrative (Details) $ in Millions | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2018 USD ($) | Jun. 29, 2019 USD ($) lease_contract | Jun. 30, 2018 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2019 | Jan. 01, 2019 USD ($)
Lessee, Lease, Description [Line Items] |  |  |  |  |  |
Right-of-use assets |  | $ 447.6 |  |  |  |
Lease liability |  | $ 455.5 |  |  |  |
Number of lease contracts | lease_contract |  | 2 |  |  |  |
Rent expense | $ 39.9 |  | $ 81.3 |  |  |
Forecast |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |
Right-of-use assets |  |  |  | $ 110.0 |  |
Lease liability |  |  |  | $ 112.0 |  |
Lease term |  |  |  | 10 years | 10 years |
Accounting Standards Update 2016-02 |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |
Right-of-use assets |  |  |  |  |  | $ 438.1
Lease liability |  |  |  |  |  | $ 445.8

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- Definition Lessee, Operating Lease, Number Of Lease Contracts Entered During Period + References No definition available. + Details
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- Definition 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. + References No definition available. + Details
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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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