Supplemental Financial Information (Tables)

12 Months Ended

Dec. 31, 2017



(in millions)	December 31, 2017		December 31, 2016
Derivative contracts	$	136	$	120
Intangible assets, net	413		426
Capital lease receivable	76		90
Other	161		138
Other assets	$	786	$	774

Accounts Payable



(in millions)	December 31, 2017		December 31, 2016
Accounts payable trade	$	186	$	138
Salaries payable	201		200
Taxes payable	203		184
Aircraft maintenance payable	38		26
Fuel payable	123		95
Other payable	569		535
Accounts payable	$	1,320	$	1,178

Accrued Liabilities



(in millions)	December 31, 2017			December 31, 2016
Profitsharing and savings plans	$	579		$	645
Aircraft and other lease related obligations	40			55
Permanently grounded aircraft liability	34		(a)	—
Vacation pay	365			355
Contract ratification bonuses	83			188
Health	100			96
Derivative contracts	1			158
Workers compensation	172			183
Property and income taxes	57			68
Other	346			237
Accrued liabilities	$	1,777		$	1,985

Other Noncurrent Liabilities



(in millions)	December 31, 2017			December 31, 2016
Postretirement obligation	$	275		$	256
Non-current lease-related obligations	85			125
Permanently grounded aircraft liability	13		(a)	—
Other deferred compensation	237			204
Derivative contracts	21			35
Other	76			108
Other noncurrent liabilities	$	707		$	728

(a) These amounts represent the current and noncurrent portion of the Company's cease-use liability recorded during third quarter 2017, as a result of the Company grounding its remaining leased Boeing 737-300 aircraft on September 29, 2017. The liability reflects the remaining net lease payments due and certain lease return requirements that could have to be performed on these leased aircraft prior to their return to the lessors as of the cease-use date, but does not include the write–off of approximately $15 million in net prepaid rents associated with the aircraft at the grounding date, which were included in the $63 million charge recorded. See Note 7 for further information. This loss related to the grounding of the Classic fleet was recorded to Other operating expenses in the Consolidated Statement of Income during third quarter 2017. Approximately $3 million of this liability was paid during fourth quarter 2017.