XML 100 R34.htm IDEA: XBRL DOCUMENT

COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2011

Schedule of future minimum rental payments under leases

	Millions of dollars
2012	$	11
2013	10
2014	4
2015	2
2016	1
Thereafter	28
Total	$	56

Purchase Commitment Long-term Commitment

	Millions of dollars
2012	$	1,542
2013	1,037
2014	897
2015	804
2016	801
Thereafter	1,108
Total	$	6,189

Summary of reconciliation of beginning and ending aggregate carrying amount of asset retirement obligations

Millions of dollars	2011			2010
Beginning balance	$	497		$	477
Liabilities incurred	1			1
Liabilities settled	(4		)	(1		)
Accretion expense	23			25
Revisions in estimated cash flows	(44		)	(5		)
Ending Balance	$	473		$	497

- Definition

Tabular disclosure of unconditional purchase obligations that are not recognized as a liability on the balance sheet, including the nature and significant terms of an unconditional purchase obligation; the amount of the fixed and determinable portion of the obligation as of the date of the latest balance sheet presented in the aggregate and, if determinable, for each of the five succeeding fiscal years; the nature of any variable components of the obligation; the amount purchased under the obligation (for example, the take-or-pay or throughput contract) for the reporting period; and may include the amount of imputed interest necessary to reduce the obligation to present value.

+ References+ Details