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Employee Retirement Benefit Plans	12 Months Ended
Employee Retirement Benefit Plans	Dec. 31, 2011
Employee Retirement Benefit Plans [Abstract]
Employee Retirement Benefit Plans	10. Employee Retirement Benefit Plans Defined Contribution-Type Plans. We sponsor defined contribution plans covering substantially all our U.S.-based employees. Participants may contribute up to 100% of their annual wages, subject to certain limitations, as pretax, salary deferral contributions. We make certain matching, and at our discretion, service-based contributions to the plan. The expense related to matching and service-related contributions for 2011, 2010, and 2009 was $8.9 million, $7.4 million, and $6.4 million, respectively. We also have defined contribution-type plans for certain of our non-U.S.-based employees. The total contributions made to these plans in 2011 were $3.2 million.

The entire disclosure for pension and other postretirement benefits.

+ References

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