v3.20.4

Derivative Financial Instruments and Hedging Derivatives designated as hedges and pledged collateral (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2020	Sep. 30, 2020
Derivative Instruments, (Gain) Loss
Accumulated Other Comprehensive Income, Cumulative Changes in Net Gain from Hedges, Before Tax		$ 90.7
Cross Currency Swap Settlements and Unrealized Gains Included in AOCI		99.5	$ 99.5
Cross Currency Swap Settlements and Unrealized Gains Recognized in AOCI	$ 1.4
Collateral Already Posted		0.3	4.9
Hedging Instruments
Derivative Instruments, (Gain) Loss
Accumulated Other Comprehensive Income, Cumulative Changes in Net Gain from Hedges, Before Tax		90.7	90.2
Accumulated Other Comprehensive Income, Cumulative Changes in Net Gain from Hedges, Effect Net of Tax		68.3	$ 67.9
Interest Rate Swap | Hedging Instruments
Derivative Instruments, (Gain) Loss
Interest Rate Swap Losses to be Reclassified During Next 12 Months		$ 2.3

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- Definition

Accumulated Other Comprehensive Income, Cumulative Changes in Net Income (Loss) from Hedges, Before Tax

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Cross Currency Swap Settlements Included in AOCI

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Cross Currency Swap Settlements Recognized in AOCI

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- Definition

Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
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- Definition

The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

+ References

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-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

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