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Roll Forward of Restructuring Reserve (Detail) (Severance [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	$ 44
Expenses	9
Cash Payments	(5)
Restructuring Reserve	$ 48

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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