2.2.0.25truefalse0217 - Disclosure - S-1. Changes in Equity (APSC)truefalsefalse1falsefalseUSDfalsefalse1/1/2011 - 3/31/2011 USD ($) USD ($) / shares $Jan-01-2011_Mar-31-2011http://www.sec.gov/CIK0000764622duration2011-01-01T00:00:002011-03-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2false0us-gaap_StockholdersEquityNoteDisclosureTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00  <div style="font-family: 'Times New Roman',Times,serif; margin-left: 0in; "> <div align="left" style="font-size: 10pt; margin-top: 10pt"><b>9. Changes in Equity</b> </div> <div align="left" style="font-size: 10pt; margin-top: 10pt; text-indent: 4%">The following tables show Pinnacle West’s changes in shareholders’ equity and changes in equity of noncontrolling interests for the three months ended March 31, 2011 and 2010 (dollars in thousands): </div> <div align="center"> <table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">  <tr valign="bottom"> <td width="28%"> </td> <td width="3%"> </td> <td width="1%"> </td> <td width="7%"> </td> <td width="1%"> </td> <td width="3%"> </td> <td width="1%"> </td> <td width="7%"> </td> <td width="1%"> </td> <td width="3%"> </td> <td width="1%"> </td> <td width="7%"> </td> <td width="1%"> </td> <td width="3%"> </td> <td width="1%"> </td> <td width="7%"> </td> <td width="1%"> </td> <td width="3%"> </td> <td width="1%"> </td> <td width="7%"> </td> <td width="1%"> </td> <td width="3%"> </td> <td width="1%"> </td> <td width="7%"> </td> <td width="1%"> </td> </tr> <tr style="font-size: 10pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="10" style="border-bottom: 1px solid #000000">Three Months Ended March 31, 2011</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="10" style="border-bottom: 1px solid #000000">Three Months Ended March 31, 2010</td> <td> </td> </tr> <tr style="font-size: 10pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2">Common</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2">Noncontrolling</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2">Common</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2">Noncontrolling</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"> </td> <td> </td> </tr> <tr style="font-size: 10pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Shareholders</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Interests</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Total</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Shareholders</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Interests</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Total</td> <td> </td> </tr>   <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Beginning balance, January 1 </div></td> <td> </td> <td align="left">$</td> <td align="right">3,683,327</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">91,899</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">3,775,226</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">3,316,109</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">111,895</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">3,428,004</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Net income (loss) </div></td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(15,135</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">5,461</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(9,674</td> <td nowrap="nowrap">)</td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(6,014</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">5,117</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(897</td> <td nowrap="nowrap">)</td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Other comprehensive income (loss): </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:30px; text-indent:-15px">Net unrealized gains (losses) on derivative instruments (a) </div></td> <td> </td> <td> </td> <td align="right">988</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">988</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(91,667</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(91,667</td> <td nowrap="nowrap">)</td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px">Net reclassification of realized losses to income (b) </div></td> <td> </td> <td> </td> <td align="right">14,846</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">14,846</td> <td> </td> <td> </td> <td> </td> <td align="right">13,185</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">13,185</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:30px; text-indent:-15px">Reclassification of pension and other postretirement benefits to income </div></td> <td> </td> <td> </td> <td align="right">1,433</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">1,433</td> <td> </td> <td> </td> <td> </td> <td align="right">1,393</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">1,393</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px">Net income tax benefit (expense) related to items of other comprehensive income (loss) </div></td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(6,821</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(6,821</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">30,426</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">30,426</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Total other comprehensive income (loss) </div></td> <td> </td> <td> </td> <td align="right">10,446</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">10,446</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(46,663</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(46,663</td> <td nowrap="nowrap">)</td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Total comprehensive income (loss) </div></td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(4,689</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">5,461</td> <td> </td> <td> </td> <td> </td> <td align="right">772</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(52,677</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">5,117</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(47,560</td> <td nowrap="nowrap">)</td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Issuance of capital stock </div></td> <td> </td> <td> </td> <td align="right">13,560</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">13,560</td> <td> </td> <td> </td> <td> </td> <td align="right">2,680</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">2,680</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Purchase of treasury stock, net of reissuances </div></td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(3,530</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(3,530</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">1,078</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">1,078</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Other (primarily stock compensation) </div></td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(148</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(148</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">2</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(22</td> <td nowrap="nowrap">)</td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(20</td> <td nowrap="nowrap">)</td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Dividends on common stock </div></td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(57,109</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(57,109</td> <td nowrap="nowrap">)</td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(53,259</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(53,259</td> <td nowrap="nowrap">)</td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Net capital activities by noncontrolling interests </div></td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(923</td> <td nowrap="nowrap">)</td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(923</td> <td nowrap="nowrap">)</td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Ending balance, March 31 </div></td> <td> </td> <td align="left">$</td> <td align="right">3,631,411</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">97,360</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">3,728,771</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">3,213,933</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">116,067</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">3,330,000</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr>  </table> </div> <table width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; text-align: left"> <tr style="font-size: 6pt"> <td width="3%"> </td> <td width="1%"> </td> <td width="96%"> </td> </tr> <tr valign="top"> <td nowrap="nowrap" align="left">(a)</td> <td> </td> <td>These amounts primarily include unrealized gains and losses on contracts used to hedge our forecasted electricity and natural gas requirements to serve Native Load. These changes are primarily due to changes in forward natural gas prices and wholesale electricity prices.</td> </tr> <tr style="font-size: 3pt"> <td> </td> </tr> <tr valign="top"> <td nowrap="nowrap" align="left">(b)</td> <td> </td> <td>These amounts primarily include the reclassification of unrealized gains and losses to realized gains and losses for contracted commodities delivered during the period.</td> </tr> </table>   </div>  <div style="font-family: 'Times New Roman',Times,serif; margin-left: 0in; "> <div align="center" style="font-size: 10pt; margin-top: 0pt"> <b> </b> </div> </div> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclosures related to accounts comprising shareholders' equity, including other comprehensive income. Includes: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables; effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph d -Article 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section C, E Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 1 -Section B -Paragraph 7, 11A Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 3, 4, 5, 6, 7, 8 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Article 4 falsefalseS-1. Changes in Equity3false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://pinnaclewest.com/role/changesinequitysubsidiary1falsefalsefalse00falsefalsefalsefalsefalse2falsefalseUSDtruefalse{dei_LegalEntityAxis} : Arizona Public Service Company [Member] 1/1/2011 - 3/31/2011 USD ($) $ThreeMonthsEnded_31March2011_Arizona_Public_Service_Company_Memberhttp://www.sec.gov/CIK0000764622duration2011-01-01T00:00:002011-03-31T00:00:00falsefalseARIZONA PUBLIC SERVICE COMPANYdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldipnw_ArizonaPublicServiceCompanyMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseARIZONA PUBLIC SERVICE COMPANY4false0us-gaap_StockholdersEquityNoteDisclosureTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00  <div style="font-family: 'Times New Roman',Times,serif; margin-left: 0in; "> <div align="left" style="font-size: 10pt; margin-top: 10pt"><b>S-1. Changes in Equity</b> </div> <div align="left" style="font-size: 10pt; margin-top: 10pt; text-indent: 4%">The following tables show APS’s changes in shareholder equity and changes in equity of noncontrolling interests for the three and nine months ended March 31, 2011 and 2010 (dollars in thousands): </div> <div align="center"> <table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">  <tr valign="bottom"> <td width="28%"> </td> <td width="3%"> </td> <td width="1%"> </td> <td width="7%"> </td> <td width="1%"> </td> <td width="3%"> </td> <td width="1%"> </td> <td width="7%"> </td> <td width="1%"> </td> <td width="3%"> </td> <td width="1%"> </td> <td width="7%"> </td> <td width="1%"> </td> <td width="3%"> </td> <td width="1%"> </td> <td width="7%"> </td> <td width="1%"> </td> <td width="3%"> </td> <td width="1%"> </td> <td width="7%"> </td> <td width="1%"> </td> <td width="3%"> </td> <td width="1%"> </td> <td width="7%"> </td> <td width="1%"> </td> </tr> <tr style="font-size: 10pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="10" style="border-bottom: 1px solid #000000">Three Months Ended March 31, 2011</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="10" style="border-bottom: 1px solid #000000">Three Months Ended March 31, 2010</td> <td> </td> </tr> <tr style="font-size: 10pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2">Shareholder</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2">Noncontrolling</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2">Shareholder</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2">Noncontrolling</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"> </td> <td> </td> </tr> <tr style="font-size: 10pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Equity</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Interests</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Total</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Equity</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Interests</td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000">Total</td> <td> </td> </tr>   <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Beginning balance, January 1 </div></td> <td> </td> <td align="left">$</td> <td align="right">3,824,953</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">91,084</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">3,916,037</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">3,445,355</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">82,324</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">3,527,679</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Net income (loss) </div></td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(12,081</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">5,470</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(6,611</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">10,984</td> <td> </td> <td> </td> <td> </td> <td align="right">5,128</td> <td> </td> <td> </td> <td> </td> <td align="right">16,112</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Other comprehensive income (loss): </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:30px; text-indent:-15px">Net unrealized gains (losses) on derivative instruments (a) </div></td> <td> </td> <td> </td> <td align="right">988</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">988</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(91,667</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(91,667</td> <td nowrap="nowrap">)</td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px">Net reclassification of realized losses to income (b) </div></td> <td> </td> <td> </td> <td align="right">14,846</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">14,846</td> <td> </td> <td> </td> <td> </td> <td align="right">13,185</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">13,185</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:30px; text-indent:-15px">Reclassification of pension and other postretirement benefits to income </div></td> <td> </td> <td> </td> <td align="right">1,288</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">1,288</td> <td> </td> <td> </td> <td> </td> <td align="right">1,064</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">1,064</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px">Net income tax benefit (expense) related to items of other comprehensive income (loss) </div></td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(6,764</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(6,764</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">30,565</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">30,565</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Total other comprehensive income (loss) </div></td> <td> </td> <td> </td> <td align="right">10,358</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">10,358</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(46,853</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(46,853</td> <td nowrap="nowrap">)</td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Total comprehensive income (loss) </div></td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(1,723</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">5,470</td> <td> </td> <td> </td> <td> </td> <td align="right">3,747</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(35,869</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">5,128</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(30,741</td> <td nowrap="nowrap">)</td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Dividends on common stock </div></td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(57,100</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(57,100</td> <td nowrap="nowrap">)</td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(42,500</td> <td nowrap="nowrap">)</td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td nowrap="nowrap" align="left"> </td> <td align="right">(42,500</td> <td nowrap="nowrap">)</td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Other </div></td> <td> </td> <td> </td> <td align="right">1</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">1</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Ending balance, March 31 </div></td> <td> </td> <td align="left">$</td> <td align="right">3,766,131</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">96,554</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">3,862,685</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">3,366,986</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">87,452</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">3,454,438</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr>  </table> </div> <table width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; text-align: left"> <tr style="font-size: 6pt"> <td width="3%"> </td> <td width="1%"> </td> <td width="96%"> </td> </tr> <tr valign="top"> <td nowrap="nowrap" align="left">(a)</td> <td> </td> <td>These amounts primarily include unrealized gains and losses on contracts used to hedge our forecasted electricity and natural gas requirements to serve Native Load. 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