Condensed Consolidating Financial Statements (Statements of Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Condensed Cash Flow Statements, Captions [Line Items]
Cash flows from operating activities	$ (41.0)	$ (52.3)	$ (41.0)	$ (52.3)
Cash flows from investing activities:
Purchases of property, plant and equipment	(41.7)	(33.0)	(41.7)	(33.0)
Net cash used in investing activities	(41.7)	(33.0)	(41.7)	(33.0)
Cash flows from financing activities:
Short-term borrowings, net	0.5	0.4	0.5	0.4
Asset securitization borrowings	40.0	40.0	40.0	40.0
Asset securitization payments	(20.0)	(40.0)	(20.0)	(40.0)
Long-term debt payments	(8.2)	(23.0)	(8.2)	(23.0)
Borrowings from credit facility	1,184.5	999.0	1,184.5	999.0
Payments on credit facility	(864.0)	(845.5)	(864.0)	(845.5)
Proceeds from employee stock purchases	1.3	1.1	1.3	1.1
Repurchases of common stock	(200.0)		(200.0)	0.0
Repurchases of common stock to satisfy employee withholding tax obligations	(21.4)	(21.8)	(21.4)	(21.8)
Excess tax benefits related to share-based payments	15.7	17.3	15.7	17.3
Intercompany debt	0.0
Intercompany financing activity	0.0	0.0
Intercompany investments		0.0
Cash dividends paid	(31.8)	(26.9)	(31.8)	(26.9)
Net cash provided by financing activities	96.6	100.6	96.6	100.6
Increase in cash and cash equivalents	13.9	15.3	13.9	15.3
Effect of exchange rates on cash and cash equivalents	1.9	(5.3)	1.9	(5.3)
Cash and cash equivalents, beginning of period	38.9	37.5	38.9	37.5
Cash and cash equivalents, end of period	54.7	47.5	54.7	47.5
Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash flows from operating activities	0.0	0.0
Cash flows from investing activities:
Purchases of property, plant and equipment	0.0	0.0
Net cash used in investing activities	0.0	0.0
Cash flows from financing activities:
Short-term borrowings, net	0.0	0.0
Asset securitization borrowings	0.0	0.0
Asset securitization payments	0.0	0.0
Long-term debt payments	0.0	0.0
Borrowings from credit facility	0.0	0.0
Payments on credit facility	0.0	0.0
Proceeds from employee stock purchases	0.0	0.0
Repurchases of common stock	0.0
Repurchases of common stock to satisfy employee withholding tax obligations	0.0	0.0
Excess tax benefits related to share-based payments	0.0	0.0
Intercompany debt	0.0
Intercompany financing activity	0.0	0.0
Intercompany investments		0.0
Cash dividends paid	0.0	0.0
Net cash provided by financing activities	0.0	0.0
Increase in cash and cash equivalents	0.0	0.0
Effect of exchange rates on cash and cash equivalents	0.0	0.0
Cash and cash equivalents, beginning of period	0.0	0.0	0.0
Cash and cash equivalents, end of period	0.0	0.0	0.0	0.0
Parent [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash flows from operating activities	46.4	2.1
Cash flows from investing activities:
Purchases of property, plant and equipment	0.0	0.0
Net cash used in investing activities	0.0	0.0
Cash flows from financing activities:
Short-term borrowings, net	0.0	0.0
Asset securitization borrowings	0.0	0.0
Asset securitization payments	0.0	0.0
Long-term debt payments	(7.5)	(22.5)
Borrowings from credit facility	1,184.5	999.0
Payments on credit facility	(864.0)	(845.5)
Proceeds from employee stock purchases	1.3	1.1
Repurchases of common stock	(200.0)
Repurchases of common stock to satisfy employee withholding tax obligations	(21.4)	(21.8)
Excess tax benefits related to share-based payments	15.7	17.3
Intercompany debt	(11.9)
Intercompany financing activity	(110.2)	(24.3)
Intercompany investments		(77.8)
Cash dividends paid	(31.8)	(26.9)
Net cash provided by financing activities	(45.3)	(1.4)
Increase in cash and cash equivalents	1.1	0.7
Effect of exchange rates on cash and cash equivalents	0.0	0.0
Cash and cash equivalents, beginning of period	0.5	1.0	0.5
Cash and cash equivalents, end of period	1.6	1.7	1.6	1.7
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash flows from operating activities	(51.3)	(45.0)
Cash flows from investing activities:
Purchases of property, plant and equipment	(36.8)	(27.8)
Net cash used in investing activities	(36.8)	(27.8)
Cash flows from financing activities:
Short-term borrowings, net	0.0	0.0
Asset securitization borrowings	0.0	0.0
Asset securitization payments	0.0	0.0
Long-term debt payments	(0.5)	(0.3)
Borrowings from credit facility	0.0	0.0
Payments on credit facility	0.0	0.0
Proceeds from employee stock purchases	0.0	0.0
Repurchases of common stock	0.0
Repurchases of common stock to satisfy employee withholding tax obligations	0.0	0.0
Excess tax benefits related to share-based payments	0.0	0.0
Intercompany debt	(4.3)
Intercompany financing activity	109.1	3.4
Intercompany investments		79.9
Cash dividends paid	0.0	0.0
Net cash provided by financing activities	104.3	83.0
Increase in cash and cash equivalents	16.2	10.2
Effect of exchange rates on cash and cash equivalents	0.0	0.0
Cash and cash equivalents, beginning of period	7.8	11.5	7.8
Cash and cash equivalents, end of period	24.0	21.7	24.0	21.7
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash flows from operating activities	(36.1)	(9.4)
Cash flows from investing activities:
Purchases of property, plant and equipment	(4.9)	(5.2)
Net cash used in investing activities	(4.9)	(5.2)
Cash flows from financing activities:
Short-term borrowings, net	0.5	0.4
Asset securitization borrowings	40.0	40.0
Asset securitization payments	(20.0)	(40.0)
Long-term debt payments	(0.2)	(0.2)
Borrowings from credit facility	0.0	0.0
Payments on credit facility	0.0	0.0
Proceeds from employee stock purchases	0.0	0.0
Repurchases of common stock	0.0
Repurchases of common stock to satisfy employee withholding tax obligations	0.0	0.0
Excess tax benefits related to share-based payments	0.0	0.0
Intercompany debt	16.2
Intercompany financing activity	1.1	20.9
Intercompany investments		(2.1)
Cash dividends paid	0.0	0.0
Net cash provided by financing activities	37.6	19.0
Increase in cash and cash equivalents	(3.4)	4.4
Effect of exchange rates on cash and cash equivalents	1.9	(5.3)
Cash and cash equivalents, beginning of period	30.6	25.0	30.6
Cash and cash equivalents, end of period	$ 29.1	$ 24.1	$ 29.1	$ 24.1