Statements of Consolidated Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Net income	$ 2,129	$ 2,144	[1],[2],[3],[4]	$ 2,234	[1],[2],[3],[4]
Other comprehensive income (loss), net change related to:
Employee benefit plans, net of taxes	342	(195)		(313)
Fuel derivative financial instruments, net of taxes	0	1		316
Investments and other, net of taxes	(4)	(6)		(1)
Total other comprehensive income (loss), net	338	(200)		2
Total comprehensive income, net	2,467	1,944		2,236
United Airlines, Inc.
Net income	2,131	2,163	[5],[6],[7]	2,234	[5],[6],[7]
Other comprehensive income (loss), net change related to:
Employee benefit plans, net of taxes	342	(195)	[5]	(313)	[5]
Fuel derivative financial instruments, net of taxes	0	1	[5]	316	[5]
Investments and other, net of taxes	(4)	(6)	[5]	(1)	[5]
Total other comprehensive income (loss), net	338	(200)	[5]	2	[5]
Total comprehensive income, net	$ 2,469	$ 1,963	[5]	$ 2,236	[5]

[1] Amounts adjusted due to the adoption of Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606) and Accounting Standards Update No. 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. 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. 2014-09, Revenue from Contracts with Customers (Topic 606). See Note 1 to the financial statements contained in Part II, Item 8 of this report for additional information.

[3] Amounts adjusted due to the adoption of Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606). See Note 1 to the financial statements contained in Part II, Item 8 of this report for additional information.

[4] Amounts adjusted due to the adoption of Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606). See Note 1 to the financial statements contained in Part II, Item 8 of this report for additional information.

[5] Amounts adjusted due to the adoption of Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606). See Note 1 to the financial statements contained in Part II, Item 8 of this report for additional information.

[6] Amounts adjusted due to the adoption of Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606). See Note 1 to the financial statements contained in Part II, Item 8 of this report for additional information.

[7] Amounts adjusted due to the adoption of Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606). See Note 1 to the financial statements contained in Part II, Item 8 of this report for additional information.