Hedging Activities (Tables)

6 Months Ended

Sep. 30, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of information regarding the fair value of derivatives on a gross basis

Information regarding the fair value of derivatives on a gross basis is as follows:

	Balance Sheet Caption	September 30, 2020						March 31, 2020
		Fair Value of Derivative				U.S. Dollar Notional		Fair Value of Derivative				U.S. Dollar Notional
(In millions)		Asset		Liability				Asset		Liability
Derivatives designated for hedge accounting
Cross-currency swaps (current)	Prepaid expenses and other/Other accrued liabilities	$	20	$	12	$	925	$	112	$	19	$	1,279
Cross-currency swaps (non-current)	Other non-current assets/liabilities	81		42		3,313		182		—		3,313
Forward starting interest rate swaps (current)	Other accrued liabilities	—		11		1,203		—		—		—
Total		$	101	$	65			$	294	$	19
Derivatives not designated for hedge accounting
Foreign exchange contracts (current)	Prepaid expenses and other	$	1	$	—	$	32	$	2	$	—	$	24
Foreign exchange contracts (current)	Other accrued liabilities	—		—		13		—		—		5
Total		$	1	$	—			$	2	$	—