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Financial Instruments (Narrative) (Details) € in Millions, $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2018 EUR (€)
Derivative [Line Items] |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | $ 0 |  |  |
Gain (Loss) on Derivative Used in Net Investment Hedge, after Tax | $ 0 |  |  |
Currency Swap [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Liability, Notional Amount | € |  |  |  | € 200
Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Swap |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, notional amount |  |  | $ 350 |
Other Nonoperating Income (Expense) [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net |  | $ (8) | $ 1 |

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- Definition Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109977999&loc=d3e76258-113986 + Details
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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 + Details
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