Financial Instruments (Narrative) (Details) € in Millions |
3 Months Ended | ||||
---|---|---|---|---|---|
Dec. 31, 2017
USD ($)
|
Dec. 31, 2017
EUR (€)
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2016
EUR (€)
|
Sep. 30, 2017
USD ($)
|
|
Derivative [Line Items] | |||||
Cash flow hedges net losses expected to be reclassified in next twelve months | $ (14,000,000) | ||||
Net liability position of derivatives with credit risk-related contingent features | 78,700,000 | $ 34,600,000 | |||
Collateral posted on liability positions with credit risk-related contingent features | 0 | ||||
Collateral amount that counterparties would be required to post | $ 100,600,000 | $ 138,500,000 | |||
Forward Exchange Contracts | Cash Flow Hedges | |||||
Derivative [Line Items] | |||||
Maximum remaining maturity of foreign currency derivatives | 1 year 6 months | 1 year 6 months | |||
Foreign Currency Debt | Euro Denominated | |||||
Derivative [Line Items] | |||||
Notional amount included in designated foreign currency denominated debt | $ 1,091,200,000 | € 909.0 | $ 1,077,700,000 | € 912.2 |