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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Receivables, allowance for doubtful accounts $ 9 $ 8 [1]
Aircraft fuel, spare parts and supplies, obsolescence allowance 425 412 [1]
Intangibles, accumulated amortization $ 1,440 $ 1,380 [1]
Common stock, par value (in dollars per share) $ 0.01 $ 0.01 [1]
Common shares, authorized (in shares) 1,000,000,000 1,000,000,000 [1]
Common shares, outstanding (in shares) 251,216,381 269,914,769 [1]
United Airlines, Inc.    
Receivables, allowance for doubtful accounts $ 9 $ 8 [2]
Aircraft fuel, spare parts and supplies, obsolescence allowance 425 412 [2]
Intangibles, accumulated amortization $ 1,440 $ 1,380 [2]
Common stock, par value (in dollars per share) $ 0.01 $ 0.01 [2]
Common shares, authorized (in shares) 1,000 1,000 [2]
Common shares, issued (in shares) 1,000 1,000 [2]
Common shares, outstanding (in shares) 1,000 1,000 [2]
[1] Amounts adjusted due to the adoption of Accounting Standards Update No. 2016-02, Leases (Topic 842). See Note 1 to the financial statements contained in Part II, Item 8 of this report for additional information.
[2] Amounts adjusted due to the adoption of Accounting Standards Update No. 2016-02, Leases (Topic 842). See Note 1 to the financial statements contained in Part II, Item 8 of this report for additional information.