Lease Commitments (Tables)

12 Months Ended

Dec. 31, 2011

Leases [Abstract]

Schedule of capitalized leased assets

	At December 31
	2011		2010
Upstream	$	585	$	561
Downstream		316		316
All Other		–		169
Total		901		1,046
Less: Accumulated amortization		568		573
Net capitalized leased assets	$	333	$	473

Rental expenses incurred for operating leases

	Year ended December 31
	2011		2010*		2009*
Minimum rentals	$	892	$	931	$	933
Contingent rentals		11		10		7
Total		903		941		940
Less: Sublease rental income		39		41		41
Net rental expense	$	864	$	900	$	899

* Prior years have been adjusted to exclude cost of certain charters from rental expenses.

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

	At December 31
	Operating		Capital
	Leases		Leases
Year:  2012		693		70
2013		632		47
2014		523		32
2015		475		21
2016		393		13
Thereafter		793		68
Total	$	3,509	$	251
Less: Amounts representing interest and executory costs				(55	)
Net present values				196
Less: Capital lease obligations included in short-term debt				(68	)
Long-term capital lease obligations			$	128