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Employee Benefit Plans Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012 pension_plans	Jun. 30, 2011	Jun. 30, 2012 pension_plans	Jun. 30, 2011
Defined Benefit Plan Disclosure [Line Items]
Number of pension plans inherited from Fleming	3		3
Employer contributions to the pension plans	$ 1.5	$ 0.4	$ 1.5	$ 0.4
Expected employer contributions during 2012	3.2		3.2
Other Post-Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Post-retirement plan assets	$ 0		$ 0

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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