Derivative Financial Instruments and Hedging Activities (Policies)	9 Months Ended
Jan. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Classification of Cash Flows Related to Cash Flow Hedges [Policy Text Block]	In our statements of cash flows, we classify cash flows related to cash flow hedges in the same category as the cash flows from the hedged items.
Derivatives, Offsetting Fair Value Amounts, Policy [Policy Text Block]	Offsetting. As noted above, our derivative contracts are governed by ISDA agreements that allow for net settlement of derivative contracts with the same counterparty. It is our policy to present the fair values of current derivatives (i.e., those with a remaining term of 12 months or less) with the same counterparty on a net basis in our balance sheets. Similarly, we present the fair values of noncurrent derivatives with the same counterparty on a net basis. We do not net current derivatives with noncurrent derivatives in our balance sheet

Disclosure of accounting policy for offsetting or not offsetting fair value amounts recognized for derivative instruments against such amounts recognized for the right to reclaim cash collateral (a receivable) or the obligation to return cash collateral (a payable) arising from derivative instruments recognized at fair value.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=121590274&loc=d3e41675-113959

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