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Financial Instruments - Summary of The Percentage Provision Per Type of Customer Or Revenue And Age of Balance (Detail) - Trade Receivables And Contract Assets [Member]
Dec. 31, 2021
Dec. 31, 2020
Current [Member] | Tier 1 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 0.35% 0.12%
Current [Member] | Tier 2 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 0.57% 1.08%
Current [Member] | Tier 3 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 1.61% 1.72%
Current [Member] | Others [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 1.86% 1.88%
More than 30 [Member] | Tier 1 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 2.12% 0.52%
More than 30 [Member] | Tier 2 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 11.78% 13.56%
More than 30 [Member] | Tier 3 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 28.20% 27.41%
More than 30 [Member] | Others [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 9.75% 7.39%
More than 60 [Member] | Tier 1 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 5.93% 1.71%
More than 60 [Member] | Tier 2 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 26.32% 26.19%
More than 60 [Member] | Tier 3 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 50.25% 41.91%
More than 60 [Member] | Others [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 14.68% 13.60%
More than 120 [Member] | Tier 1 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 24.68% 9.03%
More than 120 [Member] | Tier 2 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 53.94% 48.24%
More than 120 [Member] | Tier 3 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 80.79% 64.49%
More than 120 [Member] | Others [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 45.79% 47.15%
More than 180 [Member] | Tier 1 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 53.91% 17.76%
More than 180 [Member] | Tier 2 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 71.59% 58.13%
More than 180 [Member] | Tier 3 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 86.94% 73.58%
More than 180 [Member] | Others [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 77.04% 76.67%
More than 270 [Member] | Tier 1 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 87.56% 41.43%
More than 270 [Member] | Tier 2 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 95.92% 72.22%
More than 270 [Member] | Tier 3 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 95.85% 90.03%
More than 270 [Member] | Others [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 96.97% 87.58%
More than 300 [Member] | Tier 1 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 100.00% 100.00%
More than 300 [Member] | Tier 2 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 100.00% 100.00%
More than 300 [Member] | Tier 3 [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 100.00% 100.00%
More than 300 [Member] | Others [Member]    
Disclosure of provision matrix [line items]    
Expected credit loss rate 100.00% 100.00%