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Basis of Presentation (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended	0 Months Ended
	Mar. 31, 2012	Apr. 02, 2012 Office building
Basis of Presentation
Tax benefit associated with deduction for pension funding recognized in equity contribution	$ 119
Net proceeds from sale of office building		133
Amount of gain from sale of office building deferred		$ 16
Lease term		10 years

The gross proceeds received from the asset(s) sold in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller less the costs incurred in connection with the transaction, such as closing and deferred financing costs.

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