1.0.0.3falseAccounting Changesfalse1$falsefalseiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170iso4217_USD_per_sharesDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instanceshares0sharesStandardhttp://www.xbrl.org/2003/instanceshares053us-gaap_ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlockus-gaaptruenadurationstringNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalse00<div>
<p style="MARGIN-TOP: 18px; MARGIN-BOTTOM: 0px"><font style="FONT-FAMILY: Times New Roman" size="2"><b>2. Accounting
Changes</b></font></p>
<p style="MARGIN-TOP: 6px; MARGIN-BOTTOM: 0px"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Fair Value
Measurements.</b> Effective January 1, 2009, ExxonMobil
adopted the authoritative guidance for fair value measurements as
they relate to nonfinancial assets and liabilities that are
measured at fair value on a nonrecurring basis. The guidance
defines fair value, establishes a framework for measuring fair
value when an entity is required to use a fair value measure for
recognition or disclosure purposes and expands the disclosures
about fair value measures. The adoption did not have a material
impact on the Corporation’s financial statements. The
Corporation previously adopted the guidance as it relates to
financial assets and liabilities that are measured at fair value
and for nonfinancial assets and liabilities that are measured at
fair value on a recurring basis.</font></p>
<p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Noncontrolling
Interests.</b> Effective January 1, 2009, ExxonMobil adopted
the authoritative guidance on consolidation as it relates to
noncontrolling interests. The guidance changed the accounting and
reporting for minority interests, which were recharacterized as
noncontrolling interests and classified as a component of equity.
The guidance requires retrospective adoption of the presentation
and disclosure requirements for existing minority interests. All
other requirements of the guidance will be applied prospectively.
The adoption of the guidance did not have a material impact on the
Corporation’s financial statements.</font></p>
<p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Business
Combinations.</b> Effective January 1, 2009, ExxonMobil
adopted the authoritative guidance for business combinations. This
guidance applies prospectively to all transactions in which an
entity obtains control of one or more other businesses. In general,
the guidance requires the acquiring entity in a business
combination to recognize the fair value of all assets acquired and
liabilities assumed in the transaction; establishes the acquisition
date as the fair value measurement point; and modifies disclosure
requirements. It also modifies the accounting treatment for
transaction costs by requiring that these be expensed as incurred.
The adoption of the guidance did not have a material impact on the
Corporation’s financial statements.</font></p>
<p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Earnings Per Share.</b>
Effective January 1, 2009, ExxonMobil adopted the
authoritative guidance for earnings per share as it relates to
determining whether instruments granted in share-based payment
transactions are participating securities. The guidance requires
that all unvested share-based payment awards that contain
nonforfeitable rights to dividends should be included in the basic
Earnings Per Share (EPS) calculation. Prior-year EPS numbers have
been adjusted retrospectively on a consistent basis with 2009
reporting. This guidance did not affect the consolidated financial
position or results of operations.</font></p>
<p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Oil and Gas
Reserves.</b> Effective December 31, 2009, ExxonMobil adopted
the authoritative guidance for estimating and disclosing oil and
gas reserve quantities. Year-end 2009 proved reserve volumes as
well as the 2009 reserve change categories were calculated using
average prices during the 12-month period. Year-end 2008 and 2007
reserve volumes were calculated using December 31 prices. The
effect on unit-of-production depreciation rates of using 12-month
average versus December 31 prices will be applied
prospectively commencing in 2010. Additionally, the definition of
“oil and gas producing activities” has been expanded to
include bitumen extracted through mining activities and
hydrocarbons from other non-traditional resources. The amended
rules also adopted a reliable technology definition that permits
reserves to be added based on field-tested technologies. The
adoption of this guidance is not expected to have a material impact
on the Corporation’s consolidated financial position or
results of operations.</font></p>
</div>2. Accounting
Changes
Fair Value
Measurements. Effective January 1, 2009, ExxonMobil
adopted the authoritative guidance for fair value measurementsfalsefalseNo definition available.No authoritative reference available.falsefalse11falseUnKnownUnKnownUnKnownfalsetrue