v2.4.0.6

Non-Mineral Leases (Tables) | 12 Months Ended
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Dec. 31, 2011
Future Minimum Rental Payments Due under Noncancelable Leases | At December 31, 2011, future minimum rental payments due under noncancelable leases related to continuing and discontinued operations were:
|  | Millions of Dollars |
2012 |  | $ | 767 |
2013 |  |  | 519 |
2014 |  |  | 382 |
2015 |  |  | 300 |
2016 |  |  | 202 |
Remaining years |  |  | 591 |
Total |  |  | 2,761 |
Less income from subleases |  |  | 132 | *
Net minimum operating lease payments |  | $ | 2,629 |
* | Includes $64 million related to subleases to related parties.
Operating Leases Rental Expense | Operating lease rental expense included in continuing operations for the years ended December 31 was:
|  | Millions of Dollars |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Total rentals* |  | $ | 304 |  |  |  | 267 |  |  |  | 259 |
Less sublease rentals |  |  | (14 | ) |  |  | (14 | ) |  |  | (18 | )
|  | $ | 290 |  |  |  | 253 |  |  |  | 241 |
* | Includes $29 million, $16 million and $15 million of contingent rentals in 2011, 2010 and 2009, respectively. Contingent rentals primarily are related to drilling equipment and are based on usage or volume of product sold.

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- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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- Definition Tabular disclosure of rental expense from operating leases for each period for which an income statement is presented with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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