Unaudited Condensed Consolidated Statements Of Cash Flows (USD $) In Millions | 9 Months Ended |
|---|
Sep. 30, 2011 | Sep. 30, 2010 |
|---|
| CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES: | | |
| Net income | $ 212.0 | $ 159.3 |
| Adjustments to reconcile net income to net cash provided by operating activities: | | |
| Loss from discontinued operations | 2.3 | 7.9 |
| Depreciation and amortization | 62.7 | 57.2 |
| Amortization of debt issuance costs and discounts | 3.2 | 2.4 |
| Stock-based compensation expense | 15.7 | 13.6 |
| Deferred income tax provision | 15.9 | 10.9 |
| Non-cash impairment charges | 0 | 3.7 |
| Write-off of deferred debt issuance costs | 0 | 3.5 |
| Net loss (gain) on asset sales and dispositions | (3.0) | 0.4 |
| Other | (0.2) | 1.2 |
| (Increase) decrease, net of effects from business combinations and divestitures: | | |
| Receivables | 57.5 | 11.8 |
| Inventory | 277.6 | (321.5) |
| Other assets | (10.5) | 27.2 |
| Increase (decrease), net of effects from business combinations and divestitures: | | |
| Vehicle floorplan payable-trade, net | (336.7) | 174.2 |
| Accounts payable | 5.0 | 32.1 |
| Other liabilities | 9.3 | 12.5 |
| Net cash provided by continuing operations | 310.8 | 196.4 |
| Net cash provided by discontinued operations | 0.3 | 1.3 |
| Net cash provided by operating activities | 311.1 | 197.7 |
| CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES: | | |
| Purchases of property and equipment | (113.8) | (77.7) |
| Property operating lease buy-outs | (13.8) | (2.6) |
| Proceeds from the sale of property and equipment | 3.0 | 0.2 |
| Proceeds from assets held for sale | 9.0 | 5.8 |
| Insurance recoveries on property and equipment | 0 | 1.8 |
| Cash used in business acquisitions, net of cash acquired | (64.2) | (73.1) |
| Proceeds from the sale of restricted investments | 0 | 1.3 |
| Cash received from business divestitures, net of cash relinquished | 4.9 | 12.4 |
| Other | 0.2 | (1.1) |
| Net cash used in continuing operations | (174.7) | (133.0) |
| Net cash used in discontinued operations | 0 | (0.3) |
| Net cash used in investing activities | (174.7) | (133.3) |
| CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES: | | |
| Repurchases of common stock | (335.0) | (507.3) |
| Proceeds from revolving credit facilities | 300.0 | 325.0 |
| Payment of revolving credit facilities | (180.0) | (115.0) |
| Proceeds from 6.75% Senior Notes due 2018 | 0 | 394.0 |
| Payment of term loan facility | 0 | (66.6) |
| Payment of debt issuance costs | 0 | (11.9) |
| Net proceeds from (payments of) vehicle floorplan payable - non-trade | (28.3) | 61.8 |
| Payments of mortgage facilities | (5.7) | (5.4) |
| Payments of long-term debt | (0.5) | (0.3) |
| Proceeds from the exercise of stock options | 66.3 | 30.1 |
| Tax benefit from stock-based awards | 19.0 | 6.3 |
| Net cash used in continuing operations | (164.2) | (153.3) |
| Net cash provided by discontinued operations | 0 | (0.1) |
| Net cash used in financing activities | (164.2) | (153.4) |
| DECREASE IN CASH AND CASH EQUIVALENTS | (27.8) | (89.0) |
| CASH AND CASH EQUIVALENTS at beginning of period | 95.1 | 173.5 |
| CASH AND CASH EQUIVALENTS at end of period | 67.3 | 84.5 |
Payment of Floating Rate Senior Notes due 2013 [Member] | | |
| CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES: | | |
| Payment of Senior Unsecured Notes | 0 | (146.1) |
Payment of 7% Senior Notes due 2014 [Member] | | |
| CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES: | | |
| Payment of Senior Unsecured Notes | $ 0 | $ (117.9) |