Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule Of Significant Accounting Policies [Line Items]
Related parties sales	$ 155.3	$ 139.0	$ 128.7
Equity income	9.6	3.8	3.6
Dividends received	1.8	7.9	1.6
Investment in joint venture	23.7	15.9
Accounts receivables, related parties	39.4	37.4
Advertising expense	2.1	3.0	3.3
Cash equivalents	773.1	526.6
Non-trade receivables	47.6	39.3
Depreciation expense	47.0	43.2	41.1
Capitalized internal-use software	8.6	6.4	4.7
Treasury stock previously repurchased shares	34.5	31.4
Minimum
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful life of other intangible assets	3 years
Maximum
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful life of other intangible assets	22 years
Weighted Average
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful life of other intangible assets	13 years
Changes In Accounting Principle
Schedule Of Significant Accounting Policies [Line Items]
Reductions in deferred tax assets	2.7
Reduction in other assets	9.1
Reduction in income taxes payable	0.8
Reduction in retained earnings	11.0
Interest rate swap contract
Schedule Of Significant Accounting Policies [Line Items]
Notional value of interest rate swap contract	250
Long-term debt, interest percentage	2.875%
Long-term debt due date	2016
Software
Schedule Of Significant Accounting Policies [Line Items]
Depreciation expense	$ 6.6	$ 8.6	$ 10.7
Software | Minimum
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful life of other intangible assets	5 years
Software | Maximum
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful life of other intangible assets	7 years
Buildings And Improvements | Minimum
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful life	3 years
Buildings And Improvements | Maximum
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful life	40 years
Machinery and Equipment | Minimum
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful life	3 years
Machinery and Equipment | Maximum
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful life	20 years