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Significant Accounting Policies - Additional Information (Details) $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Oct. 01, 2019 USD ($) | Mar. 31, 2020 ReportableSegment | Jun. 30, 2020 USD ($) ReportableSegment
Significant Accounting Policies [Line Items] |  |  |
Number of reportable segments | ReportableSegment |  | 5 | 5
Operating lease liabilities | $ 174 |  | $ 149
Operating lease right of use asset | 174 |  | $ 140
Lessee, Operating Lease, Existence of Option to Extend |  |  | true
Lessee, Operating Lease, Existence of Option to Terminate |  |  | true
Operating lease description |  |  | Lease terms reflect options to extend or terminate the lease when it is reasonably certain that the option will be exercised.
Accounting Standards Update 2018-02 [Member] | Retained earnings [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
New accounting pronouncement or change in accounting principle effect of adoption quantification amount | $ 3 |  |

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- Definition Description of lessee's operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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- Definition Indicates (true false) whether lessee has option to extend operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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 Indicates (true false) whether lessee has option to terminate operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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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