Financial instruments and risk management - Maturity analysis for financial liabilities (Details) - MXN ($)
$ in Thousands

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2017

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

$ 47,378,242

Within one year

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

7,159,554

Between one year and five years

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

40,218,688

Jet fuel Zero-Cost collars

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

$ 122,948

Jet fuel Zero-Cost collars | Within one year

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

122,948

Lease liabilities

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

45,025,973

$ 37,648,423

Lease liabilities | Within one year

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

6,306,148

6,804,194

Lease liabilities | Between one year and five years

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

38,719,825

30,844,229

Aircraft, engines, land and buildings leases

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

40,517,045

Aircraft, engines, land and buildings leases | Within one year

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

4,720,505

Aircraft, engines, land and buildings leases | Between one year and five years

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

35,796,540

Aircraft, engines, land and buildings leases | Lease liabilities

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

39,565,146

32,523,704

Aircraft, engines, land and buildings leases | Lease liabilities | Within one year

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

4,976,454

4,213,417

Aircraft, engines, land and buildings leases | Lease liabilities | Between one year and five years

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

34,588,692

28,310,287

Aircraft and engine lease return obligation

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

1,852,688

Aircraft and engine lease return obligation | Within one year

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

383,093

Aircraft and engine lease return obligation | Between one year and five years

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

1,469,595

Aircraft and engine lease return obligation | Lease liabilities

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

1,831,045

1,647,977

Aircraft and engine lease return obligation | Lease liabilities | Within one year

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

10,851

193,187

Aircraft and engine lease return obligation | Lease liabilities | Between one year and five years

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

1,820,194

1,454,790

Revolving line of credit

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

3,308,509

3,045,574

2,528,388

Revolving line of credit | Within one year

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

1,855,956

734,635

1,449,236

Revolving line of credit | Between one year and five years

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

1,452,553

2,310,939

1,079,152

Short-term working capital facilities

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

200,000

461,260

948,354

Short-term working capital facilities | Within one year

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

200,000

$ 461,260

$ 948,354

Asset backed trust notes ("CEBUR"), in Mexican pesos

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

1,500,000

Asset backed trust notes ("CEBUR"), in Mexican pesos | Between one year and five years

Liquidity risk

Contractual principal payments on financial liabilities and derivative financial instruments

$ 1,500,000