Consolidated Balance Sheets (UAH) (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Receivables, allowance for doubtful accounts	$ 18	$ 11
Aircraft fuel, spare parts and supplies, obsolescence allowance	689	610
Intangibles, accumulated amortization	1,495	1,472
Allowance for credit losses on notes receivable	$ 38	$ 21
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common shares, authorized (in shares)	1,000,000,000	1,000,000,000
Common shares, outstanding (in shares)	328,018,739	326,930,321