Long-Term Debt and Financing Arrangements - Schedule of Outstanding Debt (Parenthetical) (Detail)	6 Months Ended
	Jun. 30, 2024
Secured Equipment Notes due in 2029 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2029
Payment Frequency	monthly
Secured Equipment Notes due in 2029 [Member] | Commencing on 2024 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2024
Secured Equipment Notes due in 2028 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2028
Payment Frequency	monthly
Secured Equipment Notes due in 2028 [Member] | Commencing on 2023 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2023
Secured Equipment Notes due in 2027 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2027
Payment Frequency	monthly
Secured Equipment Notes due in 2027 [Member] | Commencing on 2023 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2023
Secured Equipment Notes due in 2027 [Member] | Commencing on 2022 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2022
Secured Equipment Notes due in 2026 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2026
Payment Frequency	monthly
Secured Equipment Notes due in 2026 [Member] | Commencing on 2021 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2021
Secured Equipment Notes due in 2025 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2025
Payment Frequency	monthly
Secured Equipment Notes due in 2025 [Member] | Commencing on 2020 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2020
Secured Equipment Notes due in 2024 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2024
Payment Frequency	monthly
Secured Equipment Notes due in 2024 [Member] | Commencing on 2020 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2020
Secured Equipment Notes due in 2024 [Member] | Commencing on 2019 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2019
Secured Equipment Notes due in 2024 [Member] | Commencing on 2017 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2017
Minimum [Member] | Secured Equipment Notes due in 2029 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	5.73%
Minimum [Member] | Secured Equipment Notes due in 2028 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	5.21%
Minimum [Member] | Secured Equipment Notes due in 2027 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	2.07%
Minimum [Member] | Secured Equipment Notes due in 2026 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	1.48%
Minimum [Member] | Secured Equipment Notes due in 2025 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	1.51%
Minimum [Member] | Secured Equipment Notes due in 2024 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	2.50%
Maximum [Member] | Secured Equipment Notes due in 2029 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	6.24%
Maximum [Member] | Secured Equipment Notes due in 2028 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	6.32%
Maximum [Member] | Secured Equipment Notes due in 2027 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	6.45%
Maximum [Member] | Secured Equipment Notes due in 2026 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	2.41%
Maximum [Member] | Secured Equipment Notes due in 2025 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	1.80%
Maximum [Member] | Secured Equipment Notes due in 2024 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	3.40%