18. Leased Assets

We and certain of our subsidiaries lease drilling rigs, tankers, office space and other assets for varying periods under contractual obligations accounted for as operating leases. Operating lease expenses for drilling rigs used to drill development wells and successful exploration wells are capitalized. At December 31, 2015, future minimum rental payments applicable to non‑cancelable operating leases with remaining terms of one year or more (other than oil and gas property leases) are as follows (in millions):

2016	$	674
2017	524
2018	401
2019	366
2020	107
Remaining years	373
Total minimum lease payments		2,445
Less: Income from subleases	85
Net minimum lease payments	$	2,360

Rental expense was as follows:

	2015		2014		2013
	(In millions)
Total rental expense	$	167	$	248	$	355
Less: Income from subleases	10		17		15
Net rental expense	$	157	$	231	$	340