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Derivatives and Hedging Fair Value of Derivatives, Balance Sheet Location (Details) $ in Thousands, € in Millions, $ in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) lb	Sep. 30, 2019 USD ($)	Sep. 30, 2020 MXN ($)	Sep. 30, 2020 CAD ($)	Sep. 30, 2020 EUR (€)	Sep. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)
Derivative [Line Items]
Non-derivative Net Investment Hedge								$ 48,753
Prepaid & Other
Derivative [Line Items]
Asset derivatives								538	$ 124
Liability derivatives								0	0
Accrued expenses and other
Derivative [Line Items]
Asset derivatives								0	0
Liability derivatives								$ 609	$ 912
Foreign currency forward contracts | Selling, general, and administrative expense
Derivative [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ (223)	$ 299	$ (80)	$ 705
Commodity swap contracts
Derivative [Line Items]
Derivative, notional amount, weight | lb			357,600
Commodity swap contracts | Cost of Sales [Member]
Derivative [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ (386)	$ (796)	$ (751)	$ (669)
Mexican peso | Foreign currency forward contracts
Derivative [Line Items]
Liability derivatives					$ 69.9
Canadian dollar | Foreign currency forward contracts
Derivative [Line Items]
Liability derivatives						$ 4.5
euro | Foreign currency forward contracts
Derivative [Line Items]
Derivative Asset, Notional Amount | €							€ 8.0

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