Debt - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2022	Mar. 31, 2022
Debt Instrument [Line Items]
Long-term debt, excluding finance lease liabilities	$ 3,874	$ 4,065
Fair value
Debt Instrument [Line Items]
Long-term debt, excluding finance lease liabilities	3,300	3,700
Carrying value
Debt Instrument [Line Items]
Long-term debt, excluding finance lease liabilities	$ 3,800	$ 4,000