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Leases - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2023
Mar. 31, 2024
Lessee, Lease, Description [Line Items]    
Lessee, operating lease, remaining lease term   13 years
Lessor, operating lease, lease not yet commenced, assumption and judgment, value of underlying asset, amount   $ 98
Lessee, operating lease, lease not yet commenced, term of contract   12 years
2023 Restructuring Plan    
Lessee, Lease, Description [Line Items]    
Operating lease, right-of-use asset, amortization expense $ 34  
Restructuring and related cost, accelerated depreciation $ 10