Commitments And Contingencies	3 Months Ended
Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	COMMITMENTS AND CONTINGENCIES Legal Proceedings We are involved, and will continue to be involved, in numerous legal proceedings arising out of the conduct of our business, including litigation with customers, wage and hour and other employment-related lawsuits, and actions brought by governmental authorities. Some of these lawsuits purport or may be determined to be class or collective actions and seek substantial damages or injunctive relief, or both, and some may remain unresolved for several years. We establish accruals for specific legal proceedings when it is considered probable that a loss has been incurred and the amount of the loss can be reasonably estimated. Our accruals for loss contingencies are reviewed quarterly and adjusted as additional information becomes available. We disclose the amount accrued if material or if such disclosure is necessary for our financial statements to not be misleading. If a loss is not both probable and reasonably estimable, or if an exposure to loss exists in excess of the amount accrued, we assess whether there is at least a reasonable possibility that a loss, or additional loss, may have been incurred. If there is a reasonable possibility that a loss, or additional loss, may have been incurred, we disclose the estimate of the possible loss or range of loss if it is material or a statement that such an estimate cannot be made. Our evaluation of whether a loss is reasonably possible or probable is based on our assessment and consultation with legal counsel regarding the ultimate outcome of the matter. As of March 31, 2016 and 2015, we have accrued for the potential impact of loss contingencies that are probable and reasonably estimable, and there was no indication of a reasonable possibility that a material loss, or additional material loss, may have been incurred. We do not believe that the ultimate resolution of these matters will have a material adverse effect on our results of operations, financial condition, or cash flows. However, the results of these matters cannot be predicted with certainty, and an unfavorable resolution of one or more of these matters could have a material adverse effect on our results of operations, financial condition, or cash flows. Other Matters AutoNation, acting through its subsidiaries, is the lessee under many real estate leases that provide for the use by our subsidiaries of their respective store premises. Pursuant to these leases, our subsidiaries generally agree to indemnify the lessor and other related parties from certain liabilities arising as a result of the use of the leased premises, including environmental liabilities, or a breach of the lease by the lessee. Additionally, from time to time, we enter into agreements with third parties in connection with the sale of assets or businesses in which we agree to indemnify the purchaser or related parties from certain liabilities or costs arising in connection with the assets or business. Also, in the ordinary course of business in connection with purchases or sales of goods and services, we enter into agreements that may contain indemnification provisions. In the event that an indemnification claim is asserted, our liability would be limited by the terms of the applicable agreement. From time to time, primarily in connection with dispositions of automotive stores, our subsidiaries assign or sublet to the store purchaser the subsidiaries’ interests in any real property leases associated with such stores. In general, our subsidiaries retain responsibility for the performance of certain obligations under such leases to the extent that the assignee or sublessee does not perform, whether such performance is required prior to or following the assignment or subletting of the lease. Additionally, AutoNation and its subsidiaries generally remain subject to the terms of any guarantees made by us and our subsidiaries in connection with such leases. Although we generally have indemnification rights against the assignee or sublessee in the event of non-performance under these leases, as well as certain defenses, we estimate that lessee rental payment obligations during the remaining terms of these leases with expirations ranging from 2016 to 2034 are approximately $28 million at March 31, 2016. We do not have any material known commitments that we or our subsidiaries will be called on to perform under any such assigned leases or subleases at March 31, 2016. There can be no assurance that any performance by AutoNation or its subsidiaries required under these leases would not have a material adverse effect on our business, financial condition, and cash flows. At March 31, 2016, surety bonds, letters of credit, and cash deposits totaled $99.3 million, including $44.1 million of letters of credit. In the ordinary course of business, we are required to post performance and surety bonds, letters of credit, and/or cash deposits as financial guarantees of our performance. We do not currently provide cash collateral for outstanding letters of credit. In the ordinary course of business, we are subject to numerous laws and regulations, including automotive, environmental, health and safety, and other laws and regulations. We do not anticipate that the costs of such compliance will have a material adverse effect on our business, consolidated results of operations, cash flows, or financial condition, although such outcome is possible given the nature of our operations and the extensive legal and regulatory framework applicable to our business. Further, we expect that new laws and regulations, particularly at the federal level, in other areas may be enacted, which could also materially adversely impact our business. We do not have any material known environmental commitments or contingencies.

COMMITMENTS AND CONTINGENCIES

Legal Proceedings

We are involved, and will continue to be involved, in numerous legal proceedings arising out of the conduct of our business, including litigation with customers, wage and hour and other employment-related lawsuits, and actions brought by governmental authorities. Some of these lawsuits purport or may be determined to be class or collective actions and seek substantial damages or injunctive relief, or both, and some may remain unresolved for several years. We establish accruals for specific legal proceedings when it is considered probable that a loss has been incurred and the amount of the loss can be reasonably estimated. Our accruals for loss contingencies are reviewed quarterly and adjusted as additional information becomes available. We disclose the amount accrued if material or if such disclosure is necessary for our financial statements to not be misleading. If a loss is not both probable and reasonably estimable, or if an exposure to loss exists in excess of the amount accrued, we assess whether there is at least a reasonable possibility that a loss, or additional loss, may have been incurred. If there is a reasonable possibility that a loss, or additional loss, may have been incurred, we disclose the estimate of the possible loss or range of loss if it is material or a statement that such an estimate cannot be made. Our evaluation of whether a loss is reasonably possible or probable is based on our assessment and consultation with legal counsel regarding the ultimate outcome of the matter.

As of March 31, 2016 and 2015, we have accrued for the potential impact of loss contingencies that are probable and reasonably estimable, and there was no indication of a reasonable possibility that a material loss, or additional material loss, may have been incurred. We do not believe that the ultimate resolution of these matters will have a material adverse effect on our results of operations, financial condition, or cash flows. However, the results of these matters cannot be predicted with certainty, and an unfavorable resolution of one or more of these matters could have a material adverse effect on our results of operations, financial condition, or cash flows.

Other Matters

AutoNation, acting through its subsidiaries, is the lessee under many real estate leases that provide for the use by our subsidiaries of their respective store premises. Pursuant to these leases, our subsidiaries generally agree to indemnify the lessor and other related parties from certain liabilities arising as a result of the use of the leased premises, including environmental liabilities, or a breach of the lease by the lessee. Additionally, from time to time, we enter into agreements with third parties in connection with the sale of assets or businesses in which we agree to indemnify the purchaser or related parties from certain liabilities or costs arising in connection with the assets or business. Also, in the ordinary course of business in connection with purchases or sales of goods and services, we enter into agreements that may contain indemnification provisions. In the event that an indemnification claim is asserted, our liability would be limited by the terms of the applicable agreement.

From time to time, primarily in connection with dispositions of automotive stores, our subsidiaries assign or sublet to the store purchaser the subsidiaries’ interests in any real property leases associated with such stores. In general, our subsidiaries retain responsibility for the performance of certain obligations under such leases to the extent that the assignee or sublessee does not perform, whether such performance is required prior to or following the assignment or subletting of the lease. Additionally, AutoNation and its subsidiaries generally remain subject to the terms of any guarantees made by us and our subsidiaries in connection with such leases. Although we generally have indemnification rights against the assignee or sublessee in the event of non-performance under these leases, as well as certain defenses, we estimate that lessee rental payment obligations during the remaining terms of these leases with expirations ranging from 2016 to 2034 are approximately $28 million at March 31, 2016. We do not have any material known commitments that we or our subsidiaries will be called on to perform under any such assigned leases or subleases at March 31, 2016. There can be no assurance that any performance by AutoNation or its subsidiaries required under these leases would not have a material adverse effect on our business, financial condition, and cash flows.

At March 31, 2016, surety bonds, letters of credit, and cash deposits totaled $99.3 million, including $44.1 million of letters of credit. In the ordinary course of business, we are required to post performance and surety bonds, letters of credit, and/or cash deposits as financial guarantees of our performance. We do not currently provide cash collateral for outstanding letters of credit.

In the ordinary course of business, we are subject to numerous laws and regulations, including automotive, environmental, health and safety, and other laws and regulations. We do not anticipate that the costs of such compliance will have a material adverse effect on our business, consolidated results of operations, cash flows, or financial condition, although such outcome is possible given the nature of our operations and the extensive legal and regulatory framework applicable to our business.

Further, we expect that new laws and regulations, particularly at the federal level, in other areas may be enacted, which could also materially adversely impact our business. We do not have any material known environmental commitments or contingencies.