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Organizational Efficiency Plan (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2013
Organizational Efficiency Plan Activity [Line Items]
Caption that includes restructuring charges	Other operating expenses
Organizational Efficiency Cost Reduction 2013 Plan [Member]
Organizational Efficiency Plan Activity [Line Items]
Charge		$ 60
Balance, March 31,	21
Restructuring charge, net of tax		$ 40

- 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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