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Supplemental Guarantor Information - Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Current assets: |  |  |  |
Cash and cash equivalents | $ 144.2 | $ 263.7 | $ 37.6 | $ 344.5
Accounts receivable, net | 2,320.5 | 2,168.6 |  |
Merchandise inventory | 449.5 | 452.0 |  |
Miscellaneous receivables | 336.5 | 234.9 |  |
Prepaid expenses and other | 127.4 | 118.9 |  |
Total current assets | 3,378.1 | 3,238.1 |  |
Property and equipment, net | 161.1 | 163.7 |  |
Goodwill | 2,479.6 | 2,455.0 | 2,500.4 | 2,217.6
Other intangible assets, net | 897.0 | 1,055.6 |  |
Other assets | 40.8 | 36.0 |  |
Investment in and advances to subsidiaries | 0.0 | 0.0 |  |
Total Assets | 6,956.6 | 6,948.4 |  |
Current liabilities: |  |  |  |
Accounts payable-trade | 1,317.7 | 1,072.9 |  |
Accounts payable-inventory financing | 498.0 | 580.4 |  |
Current maturities of long-term debt | 25.5 | 18.5 |  |
Deferred revenue | 194.0 | 172.6 |  |
Accrued expenses | 479.4 | 436.3 |  |
Total current liabilities | 2,514.6 | 2,280.7 |  |
Long-term liabilities: |  |  |  |
Debt | 3,210.0 | 3,215.9 |  |
Deferred income taxes | 196.3 | 369.2 |  |
Other liabilities | 52.8 | 37.1 |  |
Total long-term liabilities | 3,459.1 | 3,622.2 |  |
Total stockholders’ equity | 982.9 | 1,045.5 | 1,095.9 | 936.5
Total Liabilities and Stockholders’ Equity | 6,956.6 | 6,948.4 |  |
Reportable Legal Entities | Parent Guarantor |  |  |  |
Current assets: |  |  |  |
Cash and cash equivalents | 0.0 | 0.0 | 0.0 | 0.0
Accounts receivable, net | 0.0 | 0.0 |  |
Merchandise inventory | 0.0 | 0.0 |  |
Miscellaneous receivables | 0.0 | 0.0 |  |
Prepaid expenses and other | 0.0 | 0.0 |  |
Total current assets | 0.0 | 0.0 |  |
Property and equipment, net | 0.0 | 0.0 |  |
Goodwill | 0.0 | 0.0 |  |
Other intangible assets, net | 0.0 | 0.0 |  |
Other assets | 1.7 | 3.2 |  |
Investment in and advances to subsidiaries | 981.2 | 1,042.3 |  |
Total Assets | 982.9 | 1,045.5 |  |
Current liabilities: |  |  |  |
Accounts payable-trade | 0.0 | 0.0 |  |
Accounts payable-inventory financing | 0.0 | 0.0 |  |
Current maturities of long-term debt | 0.0 | 0.0 |  |
Deferred revenue | 0.0 | 0.0 |  |
Accrued expenses | 0.0 | 0.0 |  |
Total current liabilities | 0.0 | 0.0 |  |
Long-term liabilities: |  |  |  |
Debt | 0.0 | 0.0 |  |
Deferred income taxes | 0.0 | 0.0 |  |
Other liabilities | 0.0 | 0.0 |  |
Total long-term liabilities | 0.0 | 0.0 |  |
Total stockholders’ equity | 982.9 | 1,045.5 |  |
Total Liabilities and Stockholders’ Equity | 982.9 | 1,045.5 |  |
Reportable Legal Entities | Subsidiary Issuer |  |  |  |
Current assets: |  |  |  |
Cash and cash equivalents | 113.7 | 222.7 | 45.1 | 346.4
Accounts receivable, net | 0.0 | 0.0 |  |
Merchandise inventory | 0.0 | 0.0 |  |
Miscellaneous receivables | 103.9 | 92.6 |  |
Prepaid expenses and other | 18.0 | 14.3 |  |
Total current assets | 235.6 | 329.6 |  |
Property and equipment, net | 95.0 | 105.6 |  |
Goodwill | 751.8 | 751.8 |  |
Other intangible assets, net | 280.1 | 291.5 |  |
Other assets | 30.7 | 19.4 |  |
Investment in and advances to subsidiaries | 3,063.5 | 3,026.5 |  |
Total Assets | 4,456.7 | 4,524.4 |  |
Current liabilities: |  |  |  |
Accounts payable-trade | 42.5 | 25.9 |  |
Accounts payable-inventory financing | 1.0 | 1.2 |  |
Current maturities of long-term debt | 14.9 | 14.9 |  |
Deferred revenue | 0.0 | 0.0 |  |
Accrued expenses | 173.3 | 173.9 |  |
Total current liabilities | 231.7 | 215.9 |  |
Long-term liabilities: |  |  |  |
Debt | 3,134.2 | 3,136.3 |  |
Deferred income taxes | 66.5 | 99.1 |  |
Other liabilities | 43.1 | 30.8 |  |
Total long-term liabilities | 3,243.8 | 3,266.2 |  |
Total stockholders’ equity | 981.2 | 1,042.3 |  |
Total Liabilities and Stockholders’ Equity | 4,456.7 | 4,524.4 |  |
Reportable Legal Entities | Guarantor Subsidiaries |  |  |  |
Current assets: |  |  |  |
Cash and cash equivalents | 0.0 | 3.1 | 0.0 | 0.0
Accounts receivable, net | 2,007.7 | 1,904.9 |  |
Merchandise inventory | 375.7 | 390.6 |  |
Miscellaneous receivables | 205.0 | 130.1 |  |
Prepaid expenses and other | 61.4 | 69.0 |  |
Total current assets | 2,649.8 | 2,497.7 |  |
Property and equipment, net | 43.5 | 49.3 |  |
Goodwill | 1,439.0 | 1,439.0 |  |
Other intangible assets, net | 424.5 | 565.1 |  |
Other assets | 217.3 | 248.2 |  |
Investment in and advances to subsidiaries | 0.0 | 0.0 |  |
Total Assets | 4,774.1 | 4,799.3 |  |
Current liabilities: |  |  |  |
Accounts payable-trade | 1,112.1 | 895.3 |  |
Accounts payable-inventory financing | 480.9 | 559.5 |  |
Current maturities of long-term debt | 3.8 | 3.6 |  |
Deferred revenue | 104.5 | 100.8 |  |
Accrued expenses | 222.3 | 214.8 |  |
Total current liabilities | 1,923.6 | 1,774.0 |  |
Long-term liabilities: |  |  |  |
Debt | 8.3 | 12.1 |  |
Deferred income taxes | 100.1 | 205.4 |  |
Other liabilities | 4.6 | 3.6 |  |
Total long-term liabilities | 113.0 | 221.1 |  |
Total stockholders’ equity | 2,737.5 | 2,804.2 |  |
Total Liabilities and Stockholders’ Equity | 4,774.1 | 4,799.3 |  |
Reportable Legal Entities | Non-Guarantor Subsidiaries |  |  |  |
Current assets: |  |  |  |
Cash and cash equivalents | 32.4 | 37.9 | 31.9 | 24.6
Accounts receivable, net | 312.8 | 263.7 |  |
Merchandise inventory | 73.8 | 61.4 |  |
Miscellaneous receivables | 27.6 | 12.2 |  |
Prepaid expenses and other | 48.0 | 35.6 |  |
Total current assets | 494.6 | 410.8 |  |
Property and equipment, net | 22.6 | 8.8 |  |
Goodwill | 288.8 | 264.2 |  |
Other intangible assets, net | 192.4 | 199.0 |  |
Other assets | 2.6 | 1.5 |  |
Investment in and advances to subsidiaries | 0.0 | 0.0 |  |
Total Assets | 1,001.0 | 884.3 |  |
Current liabilities: |  |  |  |
Accounts payable-trade | 165.0 | 151.7 |  |
Accounts payable-inventory financing | 16.1 | 19.7 |  |
Current maturities of long-term debt | 6.8 | 0.0 |  |
Deferred revenue | 89.5 | 71.8 |  |
Accrued expenses | 83.8 | 47.7 |  |
Total current liabilities | 361.2 | 290.9 |  |
Long-term liabilities: |  |  |  |
Debt | 67.5 | 67.5 |  |
Deferred income taxes | 31.4 | 67.9 |  |
Other liabilities | 214.9 | 235.7 |  |
Total long-term liabilities | 313.8 | 371.1 |  |
Total stockholders’ equity | 326.0 | 222.3 |  |
Total Liabilities and Stockholders’ Equity | 1,001.0 | 884.3 |  |
Reportable Legal Entities | Co-Issuer |  |  |  |
Current assets: |  |  |  |
Cash and cash equivalents | 0.0 | 0.0 | 0.0 | 0.0
Accounts receivable, net | 0.0 | 0.0 |  |
Merchandise inventory | 0.0 | 0.0 |  |
Miscellaneous receivables | 0.0 | 0.0 |  |
Prepaid expenses and other | 0.0 | 0.0 |  |
Total current assets | 0.0 | 0.0 |  |
Property and equipment, net | 0.0 | 0.0 |  |
Goodwill | 0.0 | 0.0 |  |
Other intangible assets, net | 0.0 | 0.0 |  |
Other assets | 0.0 | 0.0 |  |
Investment in and advances to subsidiaries | 0.0 | 0.0 |  |
Total Assets | 0.0 | 0.0 |  |
Current liabilities: |  |  |  |
Accounts payable-trade | 0.0 | 0.0 |  |
Accounts payable-inventory financing | 0.0 | 0.0 |  |
Current maturities of long-term debt | 0.0 | 0.0 |  |
Deferred revenue | 0.0 | 0.0 |  |
Accrued expenses | 0.0 | 0.0 |  |
Total current liabilities | 0.0 | 0.0 |  |
Long-term liabilities: |  |  |  |
Debt | 0.0 | 0.0 |  |
Deferred income taxes | 0.0 | 0.0 |  |
Other liabilities | 0.0 | 0.0 |  |
Total long-term liabilities | 0.0 | 0.0 |  |
Total stockholders’ equity | 0.0 | 0.0 |  |
Total Liabilities and Stockholders’ Equity | 0.0 | 0.0 |  |
Consolidating Adjustments |  |  |  |
Current assets: |  |  |  |
Cash and cash equivalents | (1.9) | 0.0 | $ (39.4) | $ (26.5)
Accounts receivable, net | 0.0 | 0.0 |  |
Merchandise inventory | 0.0 | 0.0 |  |
Miscellaneous receivables | 0.0 | 0.0 |  |
Prepaid expenses and other | 0.0 | 0.0 |  |
Total current assets | (1.9) | 0.0 |  |
Property and equipment, net | 0.0 | 0.0 |  |
Goodwill | 0.0 | 0.0 |  |
Other intangible assets, net | 0.0 | 0.0 |  |
Other assets | (211.5) | (236.3) |  |
Investment in and advances to subsidiaries | (4,044.7) | (4,068.8) |  |
Total Assets | (4,258.1) | (4,305.1) |  |
Current liabilities: |  |  |  |
Accounts payable-trade | (1.9) | 0.0 |  |
Accounts payable-inventory financing | 0.0 | 0.0 |  |
Current maturities of long-term debt | 0.0 | 0.0 |  |
Deferred revenue | 0.0 | 0.0 |  |
Accrued expenses | 0.0 | (0.1) |  |
Total current liabilities | (1.9) | (0.1) |  |
Long-term liabilities: |  |  |  |
Debt | 0.0 | 0.0 |  |
Deferred income taxes | (1.7) | (3.2) |  |
Other liabilities | (209.8) | (233.0) |  |
Total long-term liabilities | (211.5) | (236.2) |  |
Total stockholders’ equity | (4,044.7) | (4,068.8) |  |
Total Liabilities and Stockholders’ Equity | $ (4,258.1) | $ (4,305.1) |  |

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