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Commitments and Contingent Liabilities (Impact of PPG Settlement Arrangement Including Change in Fair Value of Stock to be Transferred) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Change in fair value:
PPG stock	$ 5	$ (2)
Equity forward instrument	(6)	2
Accretion of asbestos liability	4	3
Asbestos settlement - net expense	$ 3	$ 3

- Definition

Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations.

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