Summary of Non-cash Operating, Investing and Financing Activities (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Summary of Non-cash Operating, Investing and Financing Activities [Abstract]
Impact on net assets of indemnity settlement with BP Exploration and Production, Inc.	$ (82.5)	$ 0	$ 0
Net assets of NATCO acquired in exchange for Cameron common stock, excluding net cash acquired	0	0	954.1
NATCO purchase price allocation adjustment	0	(16.9)	0
Tax benefit of employee stock compensation plan transactions	4.9	17.4	9.7
Change in fair value of derivatives accounted for as cash flow hedges, net of tax	(5.2)	(6.1)	11.3
Actuarial gain (loss) and impact of plan amendments, net, related to defined benefit pension and postretirement benefit plans	$ (7.7)	$ 4.5	$ (23.0)

Tax benefit associated with any equity-based compensation plan other than an employee stock ownership plan (ESOP). The tax benefit results from the deduction by the entity on its tax return for an award of stock that exceeds the cumulative compensation cost for common stock or preferred stock recognized for financial reporting. Includes any resulting tax benefit that exceeds the previously recognized deferred tax asset (excess tax benefits).

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The net book value of a nonmonetary asset transferred or exchanged in connection with the acquisition of a business or asset in a noncash transaction. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Nonmonetary assets and liabilities are assets and liabilities that will not result in cash receipts or cash payments in the future.

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- Definition

The accumulated change in the value of either the projected benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption that has not been recognized in net periodic benefit cost, after tax.

+ References

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+ Details

- Definition

Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

+ References

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