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Revenue - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018
Revenue From Contracts With Customers [Line Items] |  |
Maximum cash collection period from customer | 60 days |
Trade Receivable [Member] |  |
Revenue From Contracts With Customers [Line Items] |  |
Trade receivables | $ 415 | $ 482
Maximum [Member] |  |
Revenue From Contracts With Customers [Line Items] |  |
Cost incurred to obtain contract With customer amortization period of revenue recognition | 1 year |
Cost incurred to obtain contract with customer amortization period of practical expedients | 1 year |

X
- Definition Cost incurred to obtain contract with customer amortization period of practical expedients. + References No definition available. + Details
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- Definition Cost incurred to obtain contract With customer amortization period of revenue recognition. + References No definition available. + Details
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- Definition Maximum cash collection period from customer. + References No definition available. + Details
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- Definition Revenue from contracts with customers line items. + References No definition available. + Details
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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130533-203044 + Details
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Period Type: | instant

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- Details
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- Details
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