Lease Commitments (Tables)

12 Months Ended

Dec. 31, 2013

Leases [Abstract]

Schedule of capitalized leased assets

Details of the capitalized leased assets are as follows:

	At December 31
	2013		2012
Upstream	$	445	$	433
Downstream	316		316
All Other	—		—
Total	761		749
Less: Accumulated amortization	523		479
Net capitalized leased assets	$	238	$	270

Rental expenses incurred for operating leases

Rental expenses incurred for operating leases during 2013, 2012 and 2011 were as follows:

	Year ended December 31
	2013		2012		2011
Minimum rentals	$	1,049	$	973	$	892
Contingent rentals	1		7		11
Total	1,050		980		903
Less: Sublease rental income	25		32		39
Net rental expense	$	1,025	$	948	$	864

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

At December 31, 2013, 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		Capital
	Leases		Leases
Year:  2014	$	798	$	45
2015	733		32
2016	594		20
2017	472		17
2018	306		17
Thereafter	806		46
Total	$	3,709	$	177
Less: Amounts representing interest and executory costs			$	(37	)
Net present values			140
Less: Capital lease obligations included in short-term debt			(43		)
Long-term capital lease obligations			$	97