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Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2013
Stockholders' Equity Note [Abstract] |
Shares Repurchased Under Share Repurchase Program | A summary of shares repurchased under our share repurchase program authorized by our Board of Directors follows:
| 2013 |  | 2012 |  | 2011
Shares repurchased | 1.1 |  |  | 16.6 |  |  | 17.1 |
Aggregate purchase price | $ | 53.5 |  |  | $ | 580.6 |  |  | $ | 583.4 |
Average purchase price per share | $ | 47.37 |  |  | $ | 34.89 |  |  | $ | 34.14 |
Common Stock Issued With The Exercise Of Stock Options | A summary of shares of common stock issued in connection with the exercise of stock options follows:
| 2013 |  | 2012 |  | 2011
Shares issued | 1.1 |  |  | 1.7 |  |  | 4.4 |
Proceeds from the exercise of stock options | $ | 22.7 |  |  | $ | 32.0 |  |  | $ | 78.7 |
Average exercise price per share | $ | 20.31 |  |  | $ | 19.33 |  |  | $ | 17.74 |
Restricted Stock Grants And Shares Surrendered to Satisfy Tax Withholdings | The following table presents a summary of shares of common stock issued in connection with grants of restricted stock and shares surrendered to AutoNation to satisfy tax withholding obligations in connection with the vesting of restricted stock or to pay for an option exercise (in actual number of shares):
| 2013 |  | 2012 |  | 2011
Shares issued | 137,144 |  |  | 160,740 |  |  | 163,892 |
Shares surrendered to AutoNation to satisfy tax withholding obligations in connection with the vesting of restricted stock or to pay for an option exercise | 44,738 |  |  | 81,717 |  |  | 59,452 |

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- Definition Tabular disclosure of shares of common stock issued in connection with grants of restricted stock and shares surrendered to the company to satisfy tax withholding obligations in connection with the vesting of restricted stock. + References No definition available. + Details
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- Definition Tabular disclosure of an entity's treasury stock, including the average cost per share, carrying basis for each class of treasury stock, description of share repurchase program authorized by an entity's board of directors, the number of shares repurchased, the cost of the shares repurchased, the remaining maximum dollar value of shares available for repurchase under the program, the treatment of the purchase price in excess of the current market value, number of shares held for each class of treasury stock, and other information necessary to a fair presentation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 + Details
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