Receivables - Narrative (Details)	9 Months Ended
	Dec. 31, 2020 USD ($) extension	Dec. 31, 2020 EUR (€) extension	Sep. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)
Purchasers
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Receivables facility, amount	$ 500,000,000		$ 600,000,000
Deferred purchase price for receivables	0				$ 0	$ 574,000,000
Availability under receivable facility	403,000,000
Drawn amount	407,000,000
Liability for excess cash proceeds	$ 4,000,000
Number of extensions | extension	1	1
Extension term	1 year
Gain (loss) on sale of receivables	$ 0
DE Purchasers
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Receivables facility, amount	175,000,000	€ 150,000,000		$ 102,000,000
Deferred purchase price for receivables	0			$ 103,000,000
Availability under receivable facility	123,000,000
Drawn amount	$ 136,000,000
Number of extensions | extension	1	1
Extension term	1 year
Liability within accounts payable	$ 13,000,000