Derivative Financial Instruments at Fair Value (Detail) (Derivatives designated as hedging instruments, USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Other Current Assets
Derivatives, Fair Value [Line Items]
Total derivative assets	$ 1.1	$ 1.2
Sundry
Derivatives, Fair Value [Line Items]
Total derivative assets	0.1
Other Current Liabilities
Derivatives, Fair Value [Line Items]
Total derivative liabilities	0.3	1.8
Cash Flow Hedging | Commodity cash flow hedges
Derivatives, Fair Value [Line Items]
Total USD Equivalent Notional Amount, Commodity cash flow hedges	0.5	1.7
Cash Flow Hedging | Future USD sales of Canadian subsidiaries
Derivatives, Fair Value [Line Items]
Total USD Equivalent Notional Amount, Currency cash flow hedges	52.3	22.2
Cash Flow Hedging | Future USD COGS of European subsidiary
Derivatives, Fair Value [Line Items]
Total USD Equivalent Notional Amount, Currency cash flow hedges		7.9
Cash Flow Hedging | Future USD sales of a Chinese subsidiary
Derivatives, Fair Value [Line Items]
Total USD Equivalent Notional Amount, Currency cash flow hedges	24.8	16.7
Cash Flow Hedging | Future USD Purchases of European Subsidiary
Derivatives, Fair Value [Line Items]
Total USD Equivalent Notional Amount, Currency cash flow hedges	2.0
Cash Flow Hedging | Future JPY Sales of Chinese Subsidiaries
Derivatives, Fair Value [Line Items]
Total USD Equivalent Notional Amount, Currency cash flow hedges	3.1
Cash Flow Hedging | Other Current Assets
Derivatives, Fair Value [Line Items]
Total cash flow hedges, Assets	0.9	0.5
Cash Flow Hedging | Other Current Assets | Commodity cash flow hedges
Derivatives, Fair Value [Line Items]
Commodity cash flow derivatives designated as hedging instruments, Assets	0	0
Cash Flow Hedging | Other Current Assets | Future USD sales of Canadian subsidiaries
Derivatives, Fair Value [Line Items]
Currency cash flow derivatives designated as hedging instruments, Assets	0.5	0.5
Cash Flow Hedging | Other Current Assets | Future USD COGS of European subsidiary
Derivatives, Fair Value [Line Items]
Currency cash flow derivatives designated as hedging instruments, Assets		0
Cash Flow Hedging | Other Current Assets | Future USD sales of a Chinese subsidiary
Derivatives, Fair Value [Line Items]
Currency cash flow derivatives designated as hedging instruments, Assets	0.4	0
Cash Flow Hedging | Other Current Assets | Future USD Purchases of European Subsidiary
Derivatives, Fair Value [Line Items]
Currency cash flow derivatives designated as hedging instruments, Assets	0
Cash Flow Hedging | Other Current Assets | Future JPY Sales of Chinese Subsidiaries
Derivatives, Fair Value [Line Items]
Currency cash flow derivatives designated as hedging instruments, Assets	0
Cash Flow Hedging | Sundry
Derivatives, Fair Value [Line Items]
Total cash flow hedges, Assets	0.1
Cash Flow Hedging | Sundry | Commodity cash flow hedges
Derivatives, Fair Value [Line Items]
Commodity cash flow derivatives designated as hedging instruments, Assets	0
Cash Flow Hedging | Sundry | Future USD sales of Canadian subsidiaries
Derivatives, Fair Value [Line Items]
Currency cash flow derivatives designated as hedging instruments, Assets	0.1
Cash Flow Hedging | Sundry | Future USD sales of a Chinese subsidiary
Derivatives, Fair Value [Line Items]
Currency cash flow derivatives designated as hedging instruments, Assets	0
Cash Flow Hedging | Sundry | Future USD Purchases of European Subsidiary
Derivatives, Fair Value [Line Items]
Currency cash flow derivatives designated as hedging instruments, Assets	0
Cash Flow Hedging | Sundry | Future JPY Sales of Chinese Subsidiaries
Derivatives, Fair Value [Line Items]
Currency cash flow derivatives designated as hedging instruments, Assets	0
Cash Flow Hedging | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Total cash flow hedges, Liabilities	0.3	0.8
Cash Flow Hedging | Other Current Liabilities | Commodity cash flow hedges
Derivatives, Fair Value [Line Items]
Commodity cash flow derivatives designated as hedging instruments, Liabilities	0.1	0.5
Cash Flow Hedging | Other Current Liabilities | Future USD sales of Canadian subsidiaries
Derivatives, Fair Value [Line Items]
Currency cash flow derivatives designated as hedging instruments, Liabilities	0	0
Cash Flow Hedging | Other Current Liabilities | Future USD COGS of European subsidiary
Derivatives, Fair Value [Line Items]
Currency cash flow derivatives designated as hedging instruments, Liabilities		0.2
Cash Flow Hedging | Other Current Liabilities | Future USD sales of a Chinese subsidiary
Derivatives, Fair Value [Line Items]
Currency cash flow derivatives designated as hedging instruments, Liabilities	0	0.1
Cash Flow Hedging | Other Current Liabilities | Future USD Purchases of European Subsidiary
Derivatives, Fair Value [Line Items]
Currency cash flow derivatives designated as hedging instruments, Liabilities	0.1
Cash Flow Hedging | Other Current Liabilities | Future JPY Sales of Chinese Subsidiaries
Derivatives, Fair Value [Line Items]
Currency cash flow derivatives designated as hedging instruments, Liabilities	0.1
Fair value hedges | ZAR Asset on a USD subsidiary
Derivatives, Fair Value [Line Items]
Total USD Equivalent Notional Amount, Fair value hedges		21.2
Fair value hedges | USD inter-company note receivable on a European subsidiary
Derivatives, Fair Value [Line Items]
Total USD Equivalent Notional Amount, Fair value hedges		3.5
Fair value hedges | USD inter-company note receivables on a Swiss subsidiary
Derivatives, Fair Value [Line Items]
Total USD Equivalent Notional Amount, Fair value hedges	14.5	14.5
Fair value hedges | Other Current Assets
Derivatives, Fair Value [Line Items]
Fair value derivatives designated as hedging instruments, Assets	0.2	0.7
Fair value hedges | Other Current Assets | ZAR Asset on a USD subsidiary
Derivatives, Fair Value [Line Items]
Fair value derivatives designated as hedging instruments, Assets		0
Fair value hedges | Other Current Assets | USD inter-company note receivable on a European subsidiary
Derivatives, Fair Value [Line Items]
Fair value derivatives designated as hedging instruments, Assets		0
Fair value hedges | Other Current Assets | USD inter-company note receivables on a Swiss subsidiary
Derivatives, Fair Value [Line Items]
Fair value derivatives designated as hedging instruments, Assets	0.2	0.7
Fair value hedges | Sundry
Derivatives, Fair Value [Line Items]
Fair value derivatives designated as hedging instruments, Assets	0
Fair value hedges | Sundry | USD inter-company note receivables on a Swiss subsidiary
Derivatives, Fair Value [Line Items]
Fair value derivatives designated as hedging instruments, Assets	0
Fair value hedges | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Fair value derivatives designated as hedging instruments, Liabilities	0	1.0
Fair value hedges | Other Current Liabilities | ZAR Asset on a USD subsidiary
Derivatives, Fair Value [Line Items]
Fair value derivatives designated as hedging instruments, Liabilities		0.9
Fair value hedges | Other Current Liabilities | USD inter-company note receivable on a European subsidiary
Derivatives, Fair Value [Line Items]
Fair value derivatives designated as hedging instruments, Liabilities		0.1
Fair value hedges | Other Current Liabilities | USD inter-company note receivables on a Swiss subsidiary
Derivatives, Fair Value [Line Items]
Fair value derivatives designated as hedging instruments, Liabilities	$ 0	$ 0