Balance Sheet Information (Periodic Pension Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 29, 2012	Jul. 01, 2011	Jun. 29, 2012	Jul. 01, 2011
Balance Sheet Related Disclosures [Abstract]
Service Cost	$ 3.1	$ 2.1	$ 5.3	$ 4.4
Interest cost	1.6	1.3	2.9	2.6
Expected return on plan assets	(1.4)	(1.0)	(2.4)	(2.0)
Amortization of prior service cost	0	0.1	0.1	0.2
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	(6.6)	0	(6.6)	0
Defined Benefit Plan, Actuarial Net (Gains) Losses	2.4	0	2.4	0
Total net periodic pension cost	$ (0.9)	$ 2.5	$ 1.7	$ 5.2

The net increase or decrease of changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.

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+ Details

- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

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+ Details

- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

+ References+ Details

- Definition

The amount of net gain (loss) recognized in net periodic benefit cost as a result of an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services.

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-Glossary Plan Curtailment

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- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

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