CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current Assets
Cash and cash equivalents	$ 244	$ 105
Marketable securities	1,383	1,131
Total cash and marketable securities	1,627	1,236
Receivables—net	389	366
Inventories and supplies—net	55	60
Prepaid expenses and other current assets	147	125
Total Current Assets	2,218	1,787
Property and Equipment
Aircraft and other flight equipment	8,417	8,221
Other property and equipment	1,238	1,363
Deposits for future flight equipment	396	439
Property and Equipment Total	10,051	10,023
Less accumulated depreciation and amortization	3,307	3,242
Total Property and Equipment - Net	6,744	6,781
Operating Lease, Right-of-Use Asset	1,696	0
Goodwill	1,943	1,943
Intangible assets - net	125	127
Other noncurrent assets	225	274
Other Assets	3,989	2,344
Total Assets	12,951	10,912
Current Liabilities
Accounts payable	156	132
Accrued wages, vacation and payroll taxes	371	415
Air traffic liability	1,173	788
Other accrued liabilities	505	416
Deferred revenue, current	768	705
Operating Lease, Liability, Current	273	0
Current portion of long-term debt	288	486
Total Current Liabilities	3,534	2,942
Long-Term Debt, Net of Current Portion	1,538	1,617
Noncurrent Liabilities
Operating Lease, Liability, Noncurrent	1,424	0
Deferred income taxes	582	512
Deferred revenue, noncurrent	1,181	1,169
Obligation for pension and postretirement medical benefits	522	503
Other liabilities	197	418
Other Liabilities and Credits Totals	3,906	2,602
Commitments and Contingencies
Shareholders' Equity
Preferred stock, $0.01 par value, Authorized: 5,000,000 shares, none issued or outstanding	0	0
Common stock, $0.01 par value, Authorized: 400,000,000 shares, Issued: 2019 - 131,365,855 shares; 2018 - 130,813,476 shares, Outstanding: 2019 - 123,338,144 shares; 2018 - 123,194,430 shares	1	1
Capital in excess of par value	270	232
Treasury stock (common), at cost: 2019 - 8,027,711 shares; 2018 - 7,619,046 shares	(593)	(568)
Accumulated other comprehensive loss	(422)	(448)
Retained earnings	4,717	4,534
Total Shareholders' Equity	3,973	3,751
Total Liabilities and Shareholders' Equity	$ 12,951	$ 10,912

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).