Business Segment Information (Other Business Segment Information) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Capital expenditures	$ 405.6	$ 274.0	$ 112.5
Depreciation and amortization	146.2	107.8	101.3
Research and development expense	116.8	90.5	68.0
Subsea Technologies
Segment Reporting Information [Line Items]
Capital expenditures	255.4	179.9	79.1
Depreciation and amortization	85.5	66.6	64.5
Research and development expense	81.9	67.1	50.7
Surface Technologies
Segment Reporting Information [Line Items]
Capital expenditures	110.1	79.7	26.4
Depreciation and amortization	38.8	23.0	19.0
Research and development expense	12.2	8.3	5.5
Energy Infrastructure
Segment Reporting Information [Line Items]
Capital expenditures	12.8	12.5	6.4
Depreciation and amortization	17.8	14.9	14.6
Research and development expense	22.7	15.1	11.8
Corporate
Segment Reporting Information [Line Items]
Capital expenditures	27.3	1.9	0.6
Depreciation and amortization	4.1	3.3	3.2
Research and development expense

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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