Fair Value Measurements

12 Months Ended

Dec. 31, 2011

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

FAIR VALUE MEASUREMENTS

The following table summarizes the basis used to measure certain assets at fair value on a recurring basis in the consolidated balance sheets:

Basis of Fair Value Measurements on a Recurring Basis at December 31	Significant Other Observable Inputs  (Level 2)		Significant Other Observable Inputs  (Level 2)
In millions	2011		2010
Assets at fair value:
Debt securities (1)	$	3	$	5

(1) Included in “Other investments” in the consolidated balance sheets.

For assets and liabilities classified as Level 2, the fair value is based on the price a dealer would pay for the security or similar securities. Market inputs are obtained from well-established and recognized vendors of market data and placed through tolerance/quality checks.

Assets that are measured using significant other observable inputs are primarily valued by reference to quoted prices of similar assets in active markets, adjusted for any terms specific to that asset. For all other assets for which observable inputs are used, fair value is derived through the use of fair value models, such as a discounted cash flow model or other standard pricing models. There were no significant transfers between Levels 1 and 2 during the years ended December 31, 2011 and 2010.