The Company and Basis of Presentation - Additional Information (Detail)	Sep. 30, 2023
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Operating revenues comprise	100.00%
Operating expenses comprise	100.00%
Minimum | Equity Interest [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Equity method investment, ownership percentage	20.00%
Minimum | Fair Value Method [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Equity method investment, ownership percentage	20.00%
Maximum
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Cost method investment, ownership Percentage	20.00%
Maximum | Equity Interest [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Equity method investment, ownership percentage	50.00%
Maximum | Fair Value Method [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Equity method investment, ownership percentage	50.00%