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Financial Instruments - Summary of Margin over LIBOR Depending on Leverage Ration (Detail) | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 4.07% | 4.17% | 3.84%
Greater Than 6.00x [Member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 6.00% |  |
Greater Than 6.00x [Member] | LIBOR / EURIBOR [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 475.00% |  |
Greater Than 6.00x [Member] | TIIE [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 425.00% |  |
Less Than 6.00x Greater Than 5.50x [Member] | LIBOR / EURIBOR [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 425.00% |  |
Less Than 6.00x Greater Than 5.50x [Member] | TIIE [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 375.00% |  |
Less Than 5.50x Greater Than 5.00x [Member] | LIBOR / EURIBOR [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 375.00% |  |
Less Than 5.50x Greater Than 5.00x [Member] | TIIE [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 325.00% |  |
Less than 5.00 Greater than 4.50 [member] | LIBOR / EURIBOR [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 300.00% |  |
Less than 5.00 Greater than 4.50 [member] | TIIE [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 250.00% |  |
Less than 4.50 Greater than 4.00 [member] | LIBOR / EURIBOR [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 250.00% |  |
Less than 4.50 Greater than 4.00 [member] | TIIE [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 210.00% |  |
Less than 4.00 Greater than 3.50 [member] | LIBOR / EURIBOR [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 212.50% |  |
Less than 4.00 Greater than 3.50 [member] | TIIE [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 180.00% |  |
Less than 3.50 Greater than 3.00 [member] | LIBOR / EURIBOR [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 175.00% |  |
Less than 3.50 Greater than 3.00 [member] | TIIE [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 150.00% |  |
Less than 3.00 Greater than 2.50 [member] | LIBOR / EURIBOR [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 150.00% |  |
Less than 3.00 Greater than 2.50 [member] | TIIE [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 125.00% |  |
Less than 2.50 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 2.50% |  |
Less than 2.50 [member] | LIBOR / EURIBOR [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 125.00% |  |
Less than 2.50 [member] | TIIE [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Applicable margin | 100.00% |  |
Top of range [member] | Less Than 6.00x Greater Than 5.50x [Member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 6.00% |  |
Top of range [member] | Less Than 5.50x Greater Than 5.00x [Member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 5.50% |  |
Top of range [member] | Less than 5.00 Greater than 4.50 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 5.00% |  |
Top of range [member] | Less than 4.50 Greater than 4.00 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 4.50% |  |
Top of range [member] | Less than 4.00 Greater than 3.50 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 4.00% |  |
Top of range [member] | Less than 3.50 Greater than 3.00 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 3.50% |  |
Top of range [member] | Less than 3.00 Greater than 2.50 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 3.00% |  |
Bottom of range [member] | Less Than 6.00x Greater Than 5.50x [Member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 5.50% |  |
Bottom of range [member] | Less Than 5.50x Greater Than 5.00x [Member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 5.00% |  |
Bottom of range [member] | Less than 5.00 Greater than 4.50 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 4.50% |  |
Bottom of range [member] | Less than 4.50 Greater than 4.00 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 4.00% |  |
Bottom of range [member] | Less than 4.00 Greater than 3.50 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 3.50% |  |
Bottom of range [member] | Less than 3.50 Greater than 3.00 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 3.00% |  |
Bottom of range [member] | Less than 3.00 Greater than 2.50 [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Consolidated leverage ratio | 2.50% |  |

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