Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ 277.8	$ 186.6	$ 205.8
Adjustments to reconcile net income to net cash provided by operating activities:
Income from equity method investments	(18.4)	(13.4)	(13.8)
Dividends from affiliates	14.9	11.0	9.1
Restructuring expenses, net of cash paid	(0.8)	0.0	0.2
Goodwill impairment	0.0	5.5	0.0
Impairment of assets	0.0	(44.5)	0.0
Provision for bad debts	2.4	2.8	2.6
Unrealized (gains) losses on derivative contracts	(0.7)	0.8	0.3
Stock-based compensation expense	31.7	26.6	23.3
Depreciation and amortization	58.1	62.8	60.8
Deferred income taxes	(4.0)	(21.3)	6.1
Pension expense	37.7	10.6	6.5
Pension contributions	(53.9)	(3.9)	(14.5)
Other items, net	0.9	1.0	0.1
Changes in assets and liabilities, net of effects of acquisitions and divestitures:
Accounts and notes receivable	(50.6)	(23.5)	(32.6)
Inventories	0.3	28.8	(96.7)
Other current assets	0.1	(1.6)	(8.3)
Accounts payable	40.1	(2.9)	46.1
Accrued expenses	36.2	4.2	6.7
Income taxes payable and receivable	(19.5)	10.9	(15.9)
Other, net	2.2	1.7	(1.0)
Net cash provided by operating activities	354.5	331.2	184.8
Cash flows from investing activities:
Proceeds from the disposal of property, plant and equipment	0.2	0.1	1.1
Purchases of property, plant and equipment	(84.3)	(69.9)	(88.4)
Net cash used in investing activities	(84.1)	(69.8)	(87.3)
Cash flows from financing activities:
Short-term borrowings, net	(2.4)	(1.7)	1.5
Asset securitization borrowings	145.0	40.0	100.0
Asset securitization payments	(295.0)	(60.0)	(40.0)
Long-term debt borrowings	350.0	0.0	300.0
Long-term debt payments	(58.8)	(24.0)	(2.3)
Borrowings from credit facility	2,336.5	1,671.0	2,073.5
Payments on credit facility	(2,346.0)	(1,807.5)	(1,908.5)
Payments of deferred financing costs	(4.2)	0.0	(2.2)
Proceeds from employee stock purchases	2.6	2.4	2.0
Repurchases of common stock	(300.0)	0.0	(550.3)
Repurchases of common stock to satisfy employee withholding tax obligations	(33.3)	(32.0)	(22.4)
Excess tax benefits related to share-based payments	19.4	22.4	11.8
Cash dividends paid	(69.0)	(59.3)	(52.6)
Net cash used in financing activities	(255.2)	(248.7)	(89.5)
Increase (decrease) in cash and cash equivalents	15.2	12.7	8.0
Effect of exchange rates on cash and cash equivalents	3.9	11.3	8.5
Cash and cash equivalents, beginning of year	38.9	37.5	38.0
Cash and cash equivalents, end of year	50.2	38.9	37.5
Cash paid during the year for:
Interest, net	26.3	23.7	17.6
Income taxes (net of refunds)	$ 127.4	$ 83.2	$ 105.3