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Fair Value and Fair Value Hierarchy of Financial Instruments - Summary of Significant Unobservable Inputs to Valuation of Financial Instruments (Detail) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Measurement Input, Price Volatility [Member] | Multiple EVA [Member] | Unlisted Equity Investment E [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Valuation technique | Multiple/ EVA | Multiple/ EVA |
Significant unobservable input | Equity volatility | Equity volatility |
Range or estimate | 69.60 | 69.60 |
Measurement Input, Price Volatility [Member] | Multiple EVA [Member] | Unlisted Equity Investment H [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Valuation technique |  |  | Multiple/ EVA
Significant unobservable input |  |  | Equity volatility
Range or estimate |  |  | 75.29
Measurement Input, Price Volatility [Member] | Multiple EVA [Member] | Unlisted Equity Investment I [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Valuation technique |  |  | Multiple/ EVA
Significant unobservable input |  |  | Equity volatility
Range or estimate |  |  | 48.52
Measurement Input, Price Volatility [Member] | Monte Carlo Stimulation Method [Member] | Derivative Financial Instruments, Assets [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Valuation technique |  | MCS | MCS
Significant unobservable input |  | Volatility of Underlying Assets | Volatility of Underlying Assets
Range or estimate |  | 49.78 | 35.95
Measurement Input, Price Volatility [Member] | Binomial Option Pricing Model [Member] | Derivative Financial Instruments, Liabilities [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Valuation technique |  |  | Binomial option pricing model
Significant unobservable input |  |  | Volatility
Range or estimate |  |  | 46.21
Measurement Input, Discount Rate [Member] | Unlisted Equity Investment J [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Significant unobservable input |  |  | Discount of lack of marketability
Range or estimate |  |  | 45
Measurement Input, Discount Rate [Member] | Derivative Financial Instruments, Liabilities [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Significant unobservable input |  |  | Discount rate
Range or estimate |  |  | 12.52
Measurement Input, Discount Rate [Member] | Valuation, Income Approach [Member] | Movie Income Right Investments [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Valuation technique | Income approach | Income approach |
Significant unobservable input | Discount rate | Discount rate |
Net Asset Value Method [Member] | Measurement Input Net Asset Value Method [Member] | Unlisted Equity Investment D [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Valuation technique |  | Net asset value method | Net asset value method
Significant unobservable input |  | Net asset value | Net asset value
Median Forward PE multiple of peers [Member] | Unlisted Equity Investment H [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Significant unobservable input |  |  | Median Forward P/E multiple of peers
Range or estimate |  |  | 2.10
Median Forward PE multiple of peers [Member] | Unlisted Equity Investment I [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Significant unobservable input |  |  | Median Forward P/E multiple of peers
Range or estimate |  |  | 18.97
Average PE multiple of peers [Member] | Multiple EVA [Member] | Unlisted Equity Investment J [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Valuation technique |  |  | Multiple/ EVA
Significant unobservable input |  |  | Average P/E multiple of peers
Range or estimate |  |  | 61.29
Minimum [Member] | Measurement Input, Discount Rate [Member] | Valuation, Income Approach [Member] | Movie Income Right Investments [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Range or estimate | 10.40 | 10.40 |
Maximum [Member] | Measurement Input, Discount Rate [Member] | Valuation, Income Approach [Member] | Movie Income Right Investments [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Range or estimate | 12.59 | 12.59 |

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