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Supplemental Guarantor Information - Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Supplemental Guarantor Information [Line Items] |  |
Net cash provided by operating activities | $ 222.2 | $ 369.9
Cash flows used in investing activities: |  |
Capital expenditures | (15.9) | (19.6)
Net cash used in investing activities | (15.9) | (19.6)
Cash flows used in financing activities: |  |
Proceeds from borrowings under revolving credit facilities | 170.0 | 44.1
Repayments of borrowings under revolving credit facilities | (170.0) | (6.1)
Repayments of long-term debt | (3.7) | (3.7)
Proceeds from issuance of long-term debt | 0.0 | 2,083.0
Payments to extinguish long-term debt | 0.0 | (2,121.3)
Payments of debt financing costs | 0.0 | (9.6)
Net change in accounts payable-inventory financing | 24.9 | (135.7)
Premium payments on interest rate cap agreements | (12.6) | 0.0
Proceeds from stock option exercises | 7.3 | 4.4
Proceeds from Coworker Stock Purchase Plan | 2.4 | 2.1
Repurchases of common stock | (109.2) | (175.4)
Payment of incentive compensation plan withholding taxes | (8.7) | (18.3)
Dividends | (32.0) | (25.5)
Other | 0.4 | (0.2)
Distributions and advances from (to) affiliates | 0.0 | 0.0
Net cash used in financing activities | (131.2) | (362.2)
Effect of exchange rate changes on cash and cash equivalents | 1.7 | (0.1)
Net increase (decrease) in cash and cash equivalents | 76.8 | (12.0)
Cash and cash equivalents—beginning of period | 144.2 | 263.7
Cash and cash equivalents—end of period | 221.0 | 251.7
Consolidating Adjustments |  |
Supplemental Guarantor Information [Line Items] |  |
Net cash provided by operating activities | (14.4) | (26.0)
Cash flows used in investing activities: |  |
Capital expenditures | 0.0 | 0.0
Net cash used in investing activities | 0.0 | 0.0
Cash flows used in financing activities: |  |
Proceeds from borrowings under revolving credit facilities | 0.0 | 0.0
Repayments of borrowings under revolving credit facilities | 0.0 | 0.0
Repayments of long-term debt | 0.0 | 0.0
Proceeds from issuance of long-term debt |  | 0.0
Payments to extinguish long-term debt |  | 0.0
Payments of debt financing costs |  | 0.0
Net change in accounts payable-inventory financing | 0.0 | 0.0
Premium payments on interest rate cap agreements | 0.0 |
Proceeds from stock option exercises | 0.0 | 0.0
Proceeds from Coworker Stock Purchase Plan | 0.0 | 0.0
Repurchases of common stock | 0.0 | 0.0
Payment of incentive compensation plan withholding taxes | 0.0 | 0.0
Dividends | 0.0 | 0.0
Other | 0.0 | 0.0
Distributions and advances from (to) affiliates | (1.9) | 2.4
Net cash used in financing activities | (1.9) | 2.4
Effect of exchange rate changes on cash and cash equivalents | 0.0 | 0.0
Net increase (decrease) in cash and cash equivalents | (16.3) | (23.6)
Cash and cash equivalents—beginning of period | (1.9) | 0.0
Cash and cash equivalents—end of period | (18.2) | (23.6)
Parent Guarantor | Reportable Legal Entities |  |
Supplemental Guarantor Information [Line Items] |  |
Net cash provided by operating activities | 0.0 | 0.0
Cash flows used in investing activities: |  |
Capital expenditures | 0.0 | 0.0
Net cash used in investing activities | 0.0 | 0.0
Cash flows used in financing activities: |  |
Proceeds from borrowings under revolving credit facilities | 0.0 | 0.0
Repayments of borrowings under revolving credit facilities | 0.0 | 0.0
Repayments of long-term debt | 0.0 | 0.0
Proceeds from issuance of long-term debt |  | 0.0
Payments to extinguish long-term debt |  | 0.0
Payments of debt financing costs |  | 0.0
Net change in accounts payable-inventory financing | 0.0 | 0.0
Premium payments on interest rate cap agreements | 0.0 |
Proceeds from stock option exercises | 0.0 | 0.0
Proceeds from Coworker Stock Purchase Plan | 0.0 | 0.0
Repurchases of common stock | (109.2) | (175.4)
Payment of incentive compensation plan withholding taxes | (8.7) | 0.0
Dividends | (32.0) | (25.5)
Other | 0.0 | 0.0
Distributions and advances from (to) affiliates | 149.9 | 200.9
Net cash used in financing activities | 0.0 | 0.0
Effect of exchange rate changes on cash and cash equivalents | 0.0 | 0.0
Net increase (decrease) in cash and cash equivalents | 0.0 | 0.0
Cash and cash equivalents—beginning of period | 0.0 | 0.0
Cash and cash equivalents—end of period | 0.0 | 0.0
Subsidiary Issuer | Reportable Legal Entities |  |
Supplemental Guarantor Information [Line Items] |  |
Net cash provided by operating activities | (13.8) | 24.5
Cash flows used in investing activities: |  |
Capital expenditures | (11.1) | (14.6)
Net cash used in investing activities | (11.1) | (14.6)
Cash flows used in financing activities: |  |
Proceeds from borrowings under revolving credit facilities | 163.0 | 38.0
Repayments of borrowings under revolving credit facilities | (163.0) | 0.0
Repayments of long-term debt | (3.7) | (3.7)
Proceeds from issuance of long-term debt |  | 2,083.0
Payments to extinguish long-term debt |  | (2,121.3)
Payments of debt financing costs |  | (9.6)
Net change in accounts payable-inventory financing | (0.9) | (0.9)
Premium payments on interest rate cap agreements | (12.6) |
Proceeds from stock option exercises | 7.3 | 4.4
Proceeds from Coworker Stock Purchase Plan | 2.4 | 2.1
Repurchases of common stock | 0.0 | 0.0
Payment of incentive compensation plan withholding taxes | 0.0 | (10.4)
Dividends | 0.0 | 0.0
Other | 0.7 | 0.0
Distributions and advances from (to) affiliates | 91.3 | (9.3)
Net cash used in financing activities | 84.5 | (27.7)
Effect of exchange rate changes on cash and cash equivalents | 0.0 | 0.0
Net increase (decrease) in cash and cash equivalents | 59.6 | (17.8)
Cash and cash equivalents—beginning of period | 113.7 | 222.7
Cash and cash equivalents—end of period | 173.3 | 204.9
Guarantor Subsidiaries |  |
Cash flows used in financing activities: |  |
Payments of debt financing costs |  | 0.0
Guarantor Subsidiaries | Reportable Legal Entities |  |
Supplemental Guarantor Information [Line Items] |  |
Net cash provided by operating activities | 239.6 | 333.2
Cash flows used in investing activities: |  |
Capital expenditures | (1.2) | (2.4)
Net cash used in investing activities | (1.2) | (2.4)
Cash flows used in financing activities: |  |
Proceeds from borrowings under revolving credit facilities | 0.0 | 0.0
Repayments of borrowings under revolving credit facilities | 0.0 | 0.0
Repayments of long-term debt | 0.0 | 0.0
Proceeds from issuance of long-term debt |  | 0.0
Payments to extinguish long-term debt |  | 0.0
Net change in accounts payable-inventory financing | 1.0 | (132.2)
Premium payments on interest rate cap agreements | 0.0 |
Proceeds from stock option exercises | 0.0 | 0.0
Proceeds from Coworker Stock Purchase Plan | 0.0 | 0.0
Repurchases of common stock | 0.0 | 0.0
Payment of incentive compensation plan withholding taxes | 0.0 | (7.7)
Dividends | 0.0 | 0.0
Other | (0.1) | 0.0
Distributions and advances from (to) affiliates | (239.3) | (194.0)
Net cash used in financing activities | (238.4) | (333.9)
Effect of exchange rate changes on cash and cash equivalents | 0.0 | 0.0
Net increase (decrease) in cash and cash equivalents | 0.0 | (3.1)
Cash and cash equivalents—beginning of period | 0.0 | 3.1
Cash and cash equivalents—end of period | 0.0 | 0.0
Non-Guarantor Subsidiaries | Reportable Legal Entities |  |
Supplemental Guarantor Information [Line Items] |  |
Net cash provided by operating activities | 10.8 | 38.2
Cash flows used in investing activities: |  |
Capital expenditures | (3.6) | (2.6)
Net cash used in investing activities | (3.6) | (2.6)
Cash flows used in financing activities: |  |
Proceeds from borrowings under revolving credit facilities | 7.0 | 6.1
Repayments of borrowings under revolving credit facilities | (7.0) | (6.1)
Repayments of long-term debt | 0.0 | 0.0
Proceeds from issuance of long-term debt |  | 0.0
Payments to extinguish long-term debt |  | 0.0
Payments of debt financing costs |  | 0.0
Net change in accounts payable-inventory financing | 24.8 | (2.6)
Premium payments on interest rate cap agreements | 0.0 |
Proceeds from stock option exercises | 0.0 | 0.0
Proceeds from Coworker Stock Purchase Plan | 0.0 | 0.0
Repurchases of common stock | 0.0 | 0.0
Payment of incentive compensation plan withholding taxes | 0.0 | (0.2)
Dividends | 0.0 | 0.0
Other | (0.2) | (0.2)
Distributions and advances from (to) affiliates | 0.0 | 0.0
Net cash used in financing activities | 24.6 | (3.0)
Effect of exchange rate changes on cash and cash equivalents | 1.7 | (0.1)
Net increase (decrease) in cash and cash equivalents | 33.5 | 32.5
Cash and cash equivalents—beginning of period | 32.4 | 37.9
Cash and cash equivalents—end of period | 65.9 | 70.4
Co-Issuer | Reportable Legal Entities |  |
Supplemental Guarantor Information [Line Items] |  |
Net cash provided by operating activities | 0.0 | 0.0
Cash flows used in investing activities: |  |
Capital expenditures | 0.0 | 0.0
Net cash used in investing activities | 0.0 | 0.0
Cash flows used in financing activities: |  |
Proceeds from borrowings under revolving credit facilities | 0.0 | 0.0
Repayments of borrowings under revolving credit facilities | 0.0 | 0.0
Repayments of long-term debt | 0.0 | 0.0
Proceeds from issuance of long-term debt |  | 0.0
Payments to extinguish long-term debt |  | 0.0
Payments of debt financing costs |  | 0.0
Net change in accounts payable-inventory financing | 0.0 | 0.0
Premium payments on interest rate cap agreements | 0.0 |
Proceeds from stock option exercises | 0.0 | 0.0
Proceeds from Coworker Stock Purchase Plan | 0.0 | 0.0
Repurchases of common stock | 0.0 | 0.0
Payment of incentive compensation plan withholding taxes | 0.0 | 0.0
Dividends | 0.0 | 0.0
Other | 0.0 | 0.0
Distributions and advances from (to) affiliates | 0.0 | 0.0
Net cash used in financing activities | 0.0 | 0.0
Effect of exchange rate changes on cash and cash equivalents | 0.0 | 0.0
Net increase (decrease) in cash and cash equivalents | 0.0 | 0.0
Cash and cash equivalents—beginning of period | 0.0 | 0.0
Cash and cash equivalents—end of period | $ 0.0 | $ 0.0

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