Condensed Consolidating Financial Statements (Statements of Cash Flows) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Cash Flow Statements, Captions [Line Items]
Cash flows from operating activities:	$ 331.2	$ 184.8	$ 210.3
Cash flows from investing activities:
Proceeds from the disposal of property, plant and equipment	0.1	1.1	2.4
Purchases of property, plant and equipment	(69.9)	(88.4)	(78.3)
Net Proceeds from sale of business	0.0	0.0	8.6
Net cash used in investing activities	(69.8)	(87.3)	(67.3)
Cash flows from financing activities:
Short-term borrowings, net	(1.7)	1.5	2.0
Asset securitization borrowings	40.0	100.0	330.0
Asset securitization payments	(60.0)	(40.0)	(200.0)
Borrowings from credit facility	1,671.0	2,073.5	1,425.5
Term loan borrowings from credit facility	0.0	300.0	0.0
Long-term debt payments	(24.0)	(2.3)	(1.0)
Payments on credit facility	(1,807.5)	(1,908.5)	(1,543.5)
Payments of deferred financing costs	0.0	(2.2)	0.0
Proceeds from employee stock purchases	2.4	2.0	1.8
Additional investment in subsidiary			(0.5)
Repurchases of common stock	0.0	(550.3)	(125.0)
Repurchases of common stock to satisfy employee withholding tax obligations	(32.0)	(22.4)	(12.0)
Excess tax benefits related to share-based payments	22.4	11.8	6.5
Intercompany debt	0.0	0.0	0.0
Intercompany financing activity	0.0	0.0	0.0
Cash dividends paid	(59.3)	(52.6)	(34.0)
Net cash used in financing activities	(248.7)	(89.5)	(150.2)
Increase (decrease) in cash and cash equivalents	12.7	8.0	(7.2)
Effect of exchange rates on cash and cash equivalents	(11.3)	(8.5)	(6.6)
Cash and cash equivalents, beginning of year	37.5	38.0	51.8
Cash and cash equivalents, end of year	38.9	37.5	38.0
Parent [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash flows from operating activities:	226.9	328.8	(30.4)
Cash flows from investing activities:
Proceeds from the disposal of property, plant and equipment	0.0	0.0	0.0
Purchases of property, plant and equipment	0.0	0.0	0.0
Net Proceeds from sale of business			5.3
Net cash used in investing activities	0.0	0.0	5.3
Cash flows from financing activities:
Short-term borrowings, net	0.0	0.0	0.0
Asset securitization borrowings	0.0	0.0	0.0
Asset securitization payments	0.0	0.0	0.0
Borrowings from credit facility	1,671.0	2,073.5	1,425.5
Term loan borrowings from credit facility		300.0
Long-term debt payments	(22.5)	0.0	0.0
Payments on credit facility	(1,807.5)	(1,908.5)	(1,543.5)
Payments of deferred financing costs		(2.2)
Proceeds from employee stock purchases	2.4	2.0	1.8
Additional investment in subsidiary			0.0
Repurchases of common stock		(550.3)	(125.0)
Repurchases of common stock to satisfy employee withholding tax obligations	(32.0)	(22.4)	(12.0)
Excess tax benefits related to share-based payments	22.4	11.8	6.5
Intercompany debt	(9.4)	(0.1)	(26.8)
Intercompany financing activity	7.5	(180.1)	332.7
Cash dividends paid	(59.3)	(52.6)	(34.0)
Net cash used in financing activities	(227.4)	(328.9)	25.2
Increase (decrease) in cash and cash equivalents	(0.5)	(0.1)	0.1
Effect of exchange rates on cash and cash equivalents	0.0	0.0	0.0
Cash and cash equivalents, beginning of year	1.0	1.1	1.0
Cash and cash equivalents, end of year	0.5	1.0	1.1
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash flows from operating activities:	49.3	(97.2)	328.4
Cash flows from investing activities:
Proceeds from the disposal of property, plant and equipment	0.1	1.0	2.4
Purchases of property, plant and equipment	(60.2)	(70.5)	(55.8)
Net Proceeds from sale of business			0.0
Net cash used in investing activities	(60.1)	(69.5)	(53.4)
Cash flows from financing activities:
Short-term borrowings, net	0.0	0.0	0.0
Asset securitization borrowings	0.0	0.0	0.0
Asset securitization payments	0.0	0.0	0.0
Borrowings from credit facility	0.0	0.0	0.0
Term loan borrowings from credit facility		0.0
Long-term debt payments	(1.2)	(1.9)	(0.7)
Payments on credit facility	0.0	0.0	0.0
Payments of deferred financing costs		0.0
Proceeds from employee stock purchases	0.0	0.0	0.0
Additional investment in subsidiary			0.0
Repurchases of common stock		0.0	0.0
Repurchases of common stock to satisfy employee withholding tax obligations	0.0	0.0	0.0
Excess tax benefits related to share-based payments	0.0	0.0	0.0
Intercompany debt	7.1	4.7	12.3
Intercompany financing activity	$ 1.2	164.9	(289.5)
Cash dividends paid		0.0	0.0
Net cash used in financing activities	$ 7.1	167.7	(277.9)
Increase (decrease) in cash and cash equivalents	(3.7)	1.0	(2.9)
Effect of exchange rates on cash and cash equivalents	0.0	0.0	0.0
Cash and cash equivalents, beginning of year	11.5	10.5	13.4
Cash and cash equivalents, end of year	7.8	11.5	10.5
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash flows from operating activities:	55.0	(46.8)	(87.7)
Cash flows from investing activities:
Proceeds from the disposal of property, plant and equipment	0.0	0.1	0.0
Purchases of property, plant and equipment	(9.7)	(17.9)	(22.5)
Net Proceeds from sale of business			3.3
Net cash used in investing activities	(9.7)	(17.8)	(19.2)
Cash flows from financing activities:
Short-term borrowings, net	(1.7)	1.5	2.0
Asset securitization borrowings	40.0	100.0	330.0
Asset securitization payments	(60.0)	(40.0)	(200.0)
Borrowings from credit facility	0.0	0.0	0.0
Term loan borrowings from credit facility		0.0
Long-term debt payments	(0.3)	(0.4)	(0.3)
Payments on credit facility	0.0	0.0	0.0
Payments of deferred financing costs		0.0
Proceeds from employee stock purchases	0.0	0.0	0.0
Additional investment in subsidiary			(0.5)
Repurchases of common stock		0.0	0.0
Repurchases of common stock to satisfy employee withholding tax obligations	0.0	0.0	0.0
Excess tax benefits related to share-based payments	0.0	0.0	0.0
Intercompany debt	2.3	(4.6)	14.5
Intercompany financing activity	$ (8.7)	15.2	(43.2)
Cash dividends paid		0.0	0.0
Net cash used in financing activities	$ (28.4)	71.7	102.5
Increase (decrease) in cash and cash equivalents	16.9	7.1	(4.4)
Effect of exchange rates on cash and cash equivalents	(11.3)	(8.5)	(6.6)
Cash and cash equivalents, beginning of year	25.0	26.4	37.4
Cash and cash equivalents, end of year	30.6	25.0	26.4
Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash flows from operating activities:	0.0	0.0	0.0
Cash flows from investing activities:
Proceeds from the disposal of property, plant and equipment	0.0	0.0	0.0
Purchases of property, plant and equipment	0.0	0.0	0.0
Net Proceeds from sale of business			0.0
Net cash used in investing activities	0.0	0.0	0.0
Cash flows from financing activities:
Short-term borrowings, net	0.0	0.0	0.0
Asset securitization borrowings	0.0	0.0	0.0
Asset securitization payments	0.0	0.0	0.0
Borrowings from credit facility	0.0	0.0	0.0
Term loan borrowings from credit facility		0.0
Long-term debt payments	0.0	0.0	0.0
Payments on credit facility	0.0	0.0	0.0
Payments of deferred financing costs		0.0
Proceeds from employee stock purchases	0.0	0.0	0.0
Additional investment in subsidiary			0.0
Repurchases of common stock		0.0	0.0
Repurchases of common stock to satisfy employee withholding tax obligations	0.0	0.0	0.0
Excess tax benefits related to share-based payments	0.0	0.0	0.0
Intercompany debt	0.0	0.0	0.0
Intercompany financing activity	$ 0.0	0.0	0.0
Cash dividends paid		0.0	0.0
Net cash used in financing activities	$ 0.0	0.0	0.0
Increase (decrease) in cash and cash equivalents	0.0	0.0	0.0
Effect of exchange rates on cash and cash equivalents	0.0	0.0	0.0
Cash and cash equivalents, beginning of year	0.0	0.0	0.0
Cash and cash equivalents, end of year	$ 0.0	$ 0.0	$ 0.0