Lease Commitments (Tables)

12 Months Ended

Dec. 31, 2015

Leases [Abstract]

Schedule of capitalized leased assets

Details of the capitalized leased assets are as follows:

	At December 31
	2015		2014
Upstream	$	800	$	765
Downstream	98		97
All Other	—		—
Total	898		862
Less: Accumulated amortization	448		381
Net capitalized leased assets	$	450	$	481

Rental expenses incurred for operating leases

Rental expenses incurred for operating leases during 2015, 2014 and 2013 were as follows:

	Year ended December 31
	2015		2014		2013
Minimum rentals	$	1,041	$	1,080	$	1,049
Contingent rentals	2		1		1
Total	1,043		1,081		1,050
Less: Sublease rental income	9		14		25
Net rental expense	$	1,034	$	1,067	$	1,025

Estimated future minimum lease payments (net of noncancelable sublease rentals) under operating and capital leases

At December 31, 2015, the estimated future minimum lease payments (net of noncancelable sublease rentals) under operating and capital leases, which at inception had a noncancelable term of more than one year, were as follows:

		At December 31
		Operating Leases		Capital Leases
Year	2016	$	846	$	23
	2017	689		21
	2018	554		19
	2019	420		19
	2020	311		6
	Thereafter	528		62
Total		$	3,348	$	150
Less: Amounts representing interest and executory costs				$	(53	)
Net present values				97
Less: Capital lease obligations included in short-term debt				(17		)
Long-term capital lease obligations				$	80