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Debt and Financing Arrangements - Components of Net Financing Charges (Details) - USD ($) $ in Millions | 3 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Debt Disclosure [Abstract] |  |
Interest expense, net of capitalized interest costs | $ 114 | $ 110
Banking fees and bond cost amortization | 13 | 30
Interest income | (9) | (7)
Net foreign exchange results for financing activities | (2) | 3
Net financing charges | $ 116 | $ 136

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- Definition The total amount of banking fees and bond cost amortization charged to income in the period through the net financing charges line item in the statement of income. + References No definition available. + Details
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- Definition Net financing charges includes interest expense, interest income, bank fees and amortization of debt issuance costs. + References No definition available. + Details
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- Definition Net foreign exchange results for financing activities. + References No definition available. + Details
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- Definition The amount of interest income and other income recognized during the period. Included in this element is interest derived from investments in debt securities, cash and cash equivalents, and other investments which reflect the time value of money or transactions in which the payments are for the use or forbearance of money and other income from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business). + References No definition available. + Details
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- Definition Amount of the cost of borrowed funds accounted for as interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.9) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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