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Defined Benefit Plans (Narrative) (Details) (VAC [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
VAC [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension liabilities	$ 235.4	$ 242.5

The amount of acquisition cost of a business combination allocated to a liability for the projected benefit obligation in excess of plan assets or an asset for plan assets in excess of the projected benefit obligation of a single-employer defined benefit pension plan.

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