Future Minimum Lease Payments for Capital and Operating Leases (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Capital Leases
2014	$ 206	[1]
2015	183	[1]
2016	168	[1]
2017	123	[1]
2018	106	[1]
After 2018	678	[1]
Minimum lease payments	1,464	[1]
Imputed interest	(594)	[1]
Present value of minimum lease payments	870	[1]
Current portion	(117)	[1]	(122)
Long-term obligations under capital leases	753	[1]	792
Facility And Other Operating Leases
Operating Leases
2014	1,192
2015	987
2016	864
2017	831
2018	710
After 2018	6,002
Minimum lease payments	10,586
Aircraft Operating Leases
Operating Leases
2014	1,601	[2]
2015	1,381	[2]
2016	1,150	[2]
2017	1,053	[2]
2018	786	[2]
After 2018	1,819	[2]
Minimum lease payments	$ 7,790	[2]

[1] As of December 31, 2013, United's aircraft capital lease minimum payments relate to leases of 47 mainline and 38 regional aircraft as well as to leases of nonaircraft assets. Imputed interest rate ranges are 4.8% to 18.5%.

[2] The operating lease payments presented above include future payments of $103 million related to 25 nonoperating aircraft as of December 31, 2013.