Acqusitions (Details) In Millions, except Per Share data, unless otherwise specified	1 Months Ended			1 Months Ended		1 Months Ended		1 Months Ended
	Jul. 31, 2012 USD ($)	Jul. 11, 2012 USD ($)	Jul. 11, 2012 NOK	Jul. 31, 2012 Customer Relationships [Member]	Jul. 11, 2012 Customer Relationships [Member] USD ($)	Jul. 31, 2012 Technology [Member]	Jul. 11, 2012 Technology [Member] USD ($)	Jul. 31, 2012 Trade Names [Member]	Jul. 11, 2012 Trade Names [Member] USD ($)
Business Acquisition [Line Items]
Business acquisition, cost of acquired entity, foreign cash paid			28
Business Acquisition, Percentage of Voting Interests Acquired		97.00%	97.00%
Business Acquisition, Cost of Acquired Entity, Cash Paid		$ 147.4
business acquistion cost of acquired entity cash paid net of cash acquired		143.6
business combinations purchase price allocation working capital		8.5
Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents		3.8
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment		33.5
business combination purchase price allocation noncurrent assets and liabilities		2.0
Business Acquisition, Purchase Price Allocation, Deferred Taxes Asset (Liability), Net, Noncurrent		24.2
Business Acquisition, Purchase Price Allocation, Noncontrolling Interest		22.0
Business Acquisition, Purchase Price Allocation, Notes Payable and Long-term Debt		45.4
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets		107.7
Business Acquisition, Purchase Price Allocation, Goodwill Amount		91.3
Acquired Finite-lived Intangible Asset, Amount					82.1		17.4		8.2
Finite-Lived Intangible Asset, Useful Life				15 years		10 years		17 years
Business Combination, Acquisition Related Costs	$ 4.0