Leases and Capacity Purchase Agreements - Additional Information Related to Leases (Details)	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Weighted-average remaining lease term - operating leases	10 years	10 years
Weighted-average remaining lease term - finance leases	2 years	3 years
Weighted-average remaining lease term - other financial liabilities	10 years	9 years
Weighted-average discount rate - operating leases	5.80%	5.50%
Weighted-average discount rate - finance leases	6.30%	6.40%
Weighted-average interest rate - other financial liabilities	5.30%	6.00%