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Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Schedule of Information Related to Amounts Recorded Related to Frequent Flyer Programs

The following table provides additional information related to the frequent flyer program (in millions):

Year Ended December 31,		Cash Proceeds from Miles Sold and Earned				Other Revenue Recognized Upon Award of Miles to Third-Party Customers (a)				Increase in Frequent Flyer Deferred Revenue for Miles Awarded (b)				Decrease in Advanced Purchase of Miles (c)
2016		$	3,022			$	1,221			$	2,050			$	(249)
2015			2,999				1,050				2,173				(224)
2014			2,861				882				2,178				(199)
(a) This amount represents other revenue recognized during the period from the sale of miles to third parties, representing the marketing-related deliverable services component of the sale.
(b) This amount represents the increase to Frequent flyer deferred revenue during the period.
(c) This amount represents the net decrease in the advance purchase of miles obligation due to cash payments for the sale of miles less than miles awarded to customers.

Schedule of Cash and Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the statements of consolidated cash flows:

		UAL												United
		At December 31,												At December 31,
		2016				2015				2014				2016				2015				2014
Current assets:
Cash and cash equivalents		$	2,179			$	3,006			$	2,002			$	2,173			$	3,000			$	1,996
Restricted cash included in Prepaid expenses and other			—				2				44				—				2				44
Other assets:
Restricted cash			124				204				276				124				204				276
Total cash, cash equivalents and restricted cash shown in the statement of consolidated cash flows		$	2,303			$	3,212			$	2,322			$	2,297			$	3,206			$	2,316

Schedule of Cash and Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the statements of consolidated cash flows:

		UAL												United
		At December 31,												At December 31,
		2016				2015				2014				2016				2015				2014
Current assets:
Cash and cash equivalents		$	2,179			$	3,006			$	2,002			$	2,173			$	3,000			$	1,996
Restricted cash included in Prepaid expenses and other			—				2				44				—				2				44
Other assets:
Restricted cash			124				204				276				124				204				276
Total cash, cash equivalents and restricted cash shown in the statement of consolidated cash flows		$	2,303			$	3,212			$	2,322			$	2,297			$	3,206			$	2,316

Estimated Useful Lives of Property and Equipment

The estimated useful lives of property and equipment are as follows:

		Estimated Useful Life (in years)
Aircraft and related rotable parts			25 to 30
Buildings			25 to 45
Other property and equipment			3 to 15
Computer software			5
Building improvements			1 to 40

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Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
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-Publisher FASB
-Name Accounting Standards Codification
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