Commitments and Contingencies (Detail) $ in Millions	Sep. 30, 2023 USD ($) period
Loss Contingencies [Line Items]
Number of annual periods committed to purchase | period	3
Purchase obligation	$ 450.0
Letters of credit available, amount	11.8
Minimum
Loss Contingencies [Line Items]
Purchase obligation	145.0
Maximum
Loss Contingencies [Line Items]
Purchase obligation	$ 155.0