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Financial risk management - Summary of Nature and Extent of Risks Arising From Financial Instruments (Detail)

v3.22.2.2
Financial risk management - Summary of Nature and Extent of Risks Arising From Financial Instruments (Detail)
 6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Exposure arising from   Long-term borrowings at variable rates
Measurement   Sensitivity analysis
Management   Economic hedge with an interest rate cap
Credit risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Exposure arising from   Cash and cash equivalents, trade receivables, derivative financial instruments and contract assets.
Measurement   Aging analysis
Management   Doing business with creditworthy companies and a strict policy of cash collection.
Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Exposure arising from Borrowings and other liabilities Borrowings and other liabilities
Measurement Cash flow forecasts Cash flow forecasts
Management Availability of borrowing facilities Availability of borrowing facilities.