2.2.0.25falsefalse006120 - Disclosure - Comprehensive Incometruefalsefalse1falsefalseUSDfalsefalse1/1/2011 - 3/31/2011 USD ($) USD ($) / shares $c20110101to20110331http://www.sec.gov/CIK0000072207duration2011-01-01T00:00:002011-03-31T00:00:00U003Standardhttp://www.xbrl.org/2003/instancesharesxbrli0U001Standardhttp://www.xbrl.org/2003/iso4217USDiso42170U002Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0U004Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2true0nbl_NotesToFinancialStatementsAbstractnblfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseNotes to Financial Statements [Abstract]3false0us-gaap_ComprehensiveIncomeNoteTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00<div><div align="justify" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;">Note 12.  Comprehensive Income</div><div style="text-indent: 0pt; display: block;"> </div><div align="left" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;">Comprehensive income includes net income and certain items recorded directly to shareholders' equity and classified as AOCL. Comprehensive income was calculated as follows:</div><div style="text-indent: 0pt; display: block;"> </div><div><table cellpadding="0" cellspacing="0" width="100%" style="font-family: times new roman; font-size: 10pt;"><tr><td valign="bottom" style="border-bottom: black 2px solid;">  </td><td valign="bottom" style="border-bottom: black 2px solid;"> </td><td colspan="6" valign="bottom" style="border-bottom: black 2px solid;"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;">Three Months Ended March 31,</div></td><td nowrap="nowrap" valign="bottom" style="border-bottom: black 2px solid; text-align: left;"> </td></tr><tr><td align="left" valign="bottom" style="border-bottom: black 2px solid;">  </td><td valign="bottom" style="border-bottom: black 2px solid;"> </td><td colspan="2" valign="bottom" style="border-bottom: black 2px solid;"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;">2011</div></td><td nowrap="nowrap" valign="bottom" style="border-bottom: black 2px solid; text-align: left;"> </td><td valign="bottom" style="border-bottom: black 2px solid;"> </td><td colspan="2" valign="bottom" style="border-bottom: black 2px solid;"><div align="center" style="text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;">2010</div></td><td nowrap="nowrap" valign="bottom" style="border-bottom: black 2px solid; text-align: left;"> </td></tr><tr bgcolor="white"><td align="left" valign="bottom"><div align="left" style="text-indent: -9pt; display: block; margin-left: 9pt; margin-right: 0pt;">(millions)</div></td><td valign="bottom"> </td><td colspan="2" valign="bottom"> </td><td nowrap="nowrap" valign="bottom" style="text-align: left;"> </td><td valign="bottom"> </td><td colspan="2" valign="bottom"> </td><td nowrap="nowrap" valign="bottom" style="text-align: left;"> </td></tr><tr bgcolor="#cceeff"><td align="left" valign="bottom" width="76%"><div align="left" style="text-indent: -9pt; display: block; margin-left: 9pt; margin-right: 0pt;">Net Income</div></td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;">$</td><td valign="bottom" width="9%" style="text-align: right;">14</td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;">$</td><td valign="bottom" width="9%" style="text-align: right;">237</td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;"> </td></tr><tr bgcolor="white"><td align="left" valign="bottom" width="76%"><div align="left" style="text-indent: -9pt; display: block; margin-left: 9pt; margin-right: 0pt;">Other Items of Comprehensive Income (Loss)</div></td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="9%" style="text-align: right;"> </td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="9%" style="text-align: right;"> </td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;"> </td></tr><tr bgcolor="#cceeff"><td align="left" valign="bottom" width="76%"><div align="left" style="text-indent: -9pt; display: block; margin-left: 9pt; margin-right: 0pt;">Oil and Gas Cash Flow Hedges</div></td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="9%" style="text-align: right;"> </td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="9%" style="text-align: right;"> </td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;"> </td></tr><tr bgcolor="white"><td align="left" valign="bottom" width="76%"><div align="left" style="text-indent: -9pt; display: block; margin-left: 18pt; margin-right: 0pt;">Realized Losses Reclassified Into Earnings</div></td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="9%" style="text-align: right;">-</td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="9%" style="text-align: right;">6</td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;"> </td></tr><tr bgcolor="#cceeff"><td align="left" valign="bottom" width="76%"><div align="left" style="text-indent: -9pt; display: block; margin-left: 27pt; margin-right: 0pt;">Less Tax Provision</div></td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="9%" style="text-align: right;">-</td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="9%" style="text-align: right;">(2</td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;">)</td></tr><tr bgcolor="white"><td align="left" valign="bottom" width="76%"><div align="left" style="text-indent: -9pt; display: block; margin-left: 9pt; margin-right: 0pt;">Interest Rate Cash Flow Hedges</div></td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="9%" style="text-align: right;"> </td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="9%" style="text-align: right;"> </td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;"> </td></tr><tr bgcolor="#cceeff"><td align="left" valign="bottom" width="76%"><div align="left" style="text-indent: -9pt; display: block; margin-left: 18pt; margin-right: 0pt;">Unrealized Change in Fair Value</div></td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="9%" style="text-align: right;">23</td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="9%" style="text-align: right;">(11</td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;">)</td></tr><tr bgcolor="white"><td align="left" valign="bottom" width="76%"><div align="left" style="text-indent: -9pt; display: block; margin-left: 27pt; margin-right: 0pt;">Less Tax Provision</div></td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="9%" style="text-align: right;">(8</td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;">)</td><td valign="bottom" width="1%"> </td><td valign="bottom" width="1%" style="text-align: left;"> </td><td valign="bottom" width="9%" style="text-align: right;">4</td><td nowrap="nowrap" valign="bottom" width="1%" style="text-align: left;"> </td></tr><tr bgcolor="#cceeff"><td align="left" valign="bottom" width="76%" style="border-bottom: black 2px solid;"><div align="left" style="text-indent: -9pt; display: block; margin-left: 9pt; margin-right: 0pt;">Net Change in Other</div></td><td valign="bottom" width="1%" style="border-bottom: black 2px solid;"> </td><td valign="bottom" width="1%" style="border-bottom: black 2px solid; text-align: left;"> </td><td valign="bottom" width="9%" style="border-bottom: black 2px solid; text-align: right;">2</td><td nowrap="nowrap" valign="bottom" width="1%" style="border-bottom: black 2px solid; text-align: left;"> </td><td valign="bottom" width="1%" style="border-bottom: black 2px solid;"> </td><td valign="bottom" width="1%" style="border-bottom: black 2px solid; text-align: left;"> </td><td valign="bottom" width="9%" style="border-bottom: black 2px solid; text-align: right;">-</td><td nowrap="nowrap" valign="bottom" width="1%" style="border-bottom: black 2px solid; text-align: left;"> </td></tr><tr bgcolor="white"><td align="left" valign="bottom" width="76%" style="border-bottom: black 2px solid;"><div align="left" style="text-indent: -9pt; display: block; margin-left: 9pt; margin-right: 0pt;">Other Comprehensive Income (Loss)</div></td><td valign="bottom" width="1%" style="border-bottom: black 2px solid;"> </td><td valign="bottom" width="1%" style="border-bottom: black 2px solid; text-align: left;"> </td><td valign="bottom" width="9%" style="border-bottom: black 2px solid; text-align: right;">17</td><td nowrap="nowrap" valign="bottom" width="1%" style="border-bottom: black 2px solid; text-align: left;"> </td><td valign="bottom" width="1%" style="border-bottom: black 2px solid;"> </td><td valign="bottom" width="1%" style="border-bottom: black 2px solid; text-align: left;"> </td><td valign="bottom" width="9%" style="border-bottom: black 2px solid; text-align: right;">(3</td><td nowrap="nowrap" valign="bottom" width="1%" style="border-bottom: black 2px solid; text-align: left;">)</td></tr><tr bgcolor="#cceeff"><td align="left" valign="bottom" width="76%" style="border-bottom: black 2px solid;"><div align="left" style="text-indent: -9pt; display: block; margin-left: 9pt; margin-right: 0pt;">Comprehensive Income</div></td><td valign="bottom" width="1%" style="border-bottom: black 2px solid;"> </td><td valign="bottom" width="1%" style="border-bottom: black 2px solid; text-align: left;">$</td><td valign="bottom" width="9%" style="border-bottom: black 2px solid; text-align: right;">31</td><td nowrap="nowrap" valign="bottom" width="1%" style="border-bottom: black 2px solid; text-align: left;"> </td><td valign="bottom" width="1%" style="border-bottom: black 2px solid;"> </td><td valign="bottom" width="1%" style="border-bottom: black 2px solid; text-align: left;">$</td><td valign="bottom" width="9%" style="border-bottom: black 2px solid; text-align: right;">234</td><td nowrap="nowrap" valign="bottom" width="1%" style="border-bottom: black 2px solid; text-align: left;"> </td></tr></table></div><div> </div></div>Note 12.  Comprehensive IncomeComprehensive income includes net income and certain items recorded directly to shareholders' equity and classified asfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis label may include the following: 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. Components of comprehensive income include: (1) foreign currency translation adjustments; (2) gains and losses on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (3) gains and losses on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (4) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (5) unrealized holding gains and losses on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (6) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (7) the net gain or loss and net prior service cost or credit for pension plans and other postretirement benefit plans.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 14-26 falsefalseComprehensive Income (Loss)12Comprehensive IncomeUnKnownUnKnownUnKnownUnKnownfalsetrue