Income tax (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
2013 Dividend Out Of Current Earnings From Brazilian Subsidiary to U.S. Parent Company	$ 21.3
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	1.0	0.6	0.9
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	8.9
Foreign Tax Credit Associated with Dividend from Brazil	8.0
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
U.S. income before income taxes	228.7	229.5	188.6
Non-U.S. income before income taxes	91.6	49.1	103.6
Income from continuing operations before income taxes	320.3	278.6	292.2
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S. federal	65.8	60.3	49.3
Foreign	33.4	30.5	31.2
State and local	6.5	5.3	0.9
Total current tax expense	105.7	96.1	81.4
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S. federal	16.6	16.4	13.3
Foreign	(16.2)	(10.2)	5.1
State and local	1.6	2.5	5.1
Total deferred tax expense	2.0	8.7	23.5
Provision for income taxes	107.7	104.8	104.9
Components of Deferred Tax Assets [Abstract]
Accounts receivable, principally due to allowances for returns and doubtful accounts	9.0	8.7
Inventories, principally due to additional costs inventories for tax purposes	30.8	25.7
Employee compensation and benefits accrued for financial reporting purposes	51.6	127.8
Foreign net operating losses	26.8	25.0
Foreign tax credits	17.0	9.0
Other	16.8	8.6
Total deferred tax assets	152.0	204.8
Less valuation allowance	(42.1)	(36.6)
Total deferred tax assets after valuation allowance	109.9	168.2
Components of Deferred Tax Liabilities [Abstract]
Plant and equipment, principally due to differences in depreciation, capitalized interest, and capitalized overhead	124.4	138.6
Goodwill and intangible assets, principally due to differences in amortization	175.3	145.8
Total deferred tax liabilities	299.7	284.4
Deferred tax liabilities, net	189.8	116.2
Deferred Tax Assets, Net, Classification [Abstract]
Deferred tax assets (included in prepaid expense and other current assets)	80.0	82.1
Deferred tax liabilities	269.8	198.3
Net deferred tax liabilities	189.8	116.2
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Computed expected tax expense on income before taxes at federal statutory rate	112.1	97.5	102.3
Increase (Decrease) Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
State and local income taxes net of federal income tax benefit	5.2	5.0	3.9
Foreign tax rate differential	(4.2)	3.1	(0.6)
Manufacturing tax benefits	(6.5)	(5.2)	(4.2)
Other	1.1	4.4	3.5
Actual income tax expense	107.7	104.8	104.9
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
Increase (Decrease) Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
State and local income taxes net of federal income tax benefit	1.60%	1.80%	1.30%
Foreign tax rate differential	(1.30%)	1.10%	(0.20%)
Manufacturing tax benefits	(2.00%)	(1.90%)	(1.40%)
Other	0.30%	1.60%	1.20%
Effective tax rate	33.60%	37.60%	35.90%
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	25.6	25.6
Additions based on tax positions related to the current year	3.6	2.3
Additions for tax positions of prior years	5.1	3.4
Reductions for tax positions of prior years	(9.9)	(0.4)
Reductions due to a lapse of the statute of limitations	(2.9)	(5.3)
Settlements	(0.1)	0
Balance at end of year	21.4	25.6	25.6
Operating loss carryforwards	85.0
Operating loss carryforwards subject to expiration	32.6
Foreign tax credit carryforward	17.0
Valuation allowance	42.1	36.6
Undistributed foreign subsidiaries earnings	390.5
Unrecognized tax benefits that would impact effective tax rate	21.4	20.4
Interest and penalties	6.5	7.5
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 5.0