Retirement Benefit Plans

3 Months Ended

Mar. 31, 2013

Compensation And Retirement Disclosure [Abstract]

Retirement Benefit Plans

12. Retirement Benefit Plans

We have defined benefit pension plans covering certain U.S. and Puerto Rico employees. The employees who are not participating in the defined benefit plans receive additional benefits under our defined contribution plans. Plan benefits are primarily based on years of credited service and the participant’s compensation. In addition to the U.S. and Puerto Rico defined benefit pension plans, we sponsor various foreign pension arrangements, including retirement and termination benefit plans required by local law or coordinated with government sponsored plans.

The components of net periodic pension expense for our U.S. and foreign defined benefit retirement plans are as follows (in millions):

	Three Months Ended March 31,
	2013			2012
Service cost	$	7.1		$	6.8
Interest cost		4.7			5.0
Expected return on plan assets		(8.9	)		(8.3	)
Amortization of prior service cost		(1.0	)		(0.2	)
Amortization of unrecognized actuarial loss		4.7			3.4
Net periodic pension expense	$	6.6		$	6.7

We contributed $20.0 million during the three month period ended March 31, 2013 to our U.S. and Puerto Rico defined benefit plans and expect to contribute an additional $15.0 million to these plans during the remainder of 2013. We contributed $3.9 million to our foreign-based defined benefit plans in the three month period ended March 31, 2013 and expect to contribute $11.7 million to these foreign-based plans during the remainder of 2013.

In March 2012, we amended our U.S. defined benefit pension plan which led us to remeasure our plan assets and obligations. Accordingly, the resulting remeasurement was reflected in our condensed consolidated statements of earnings and condensed consolidated statements of comprehensive income.