Financing Arrangements and Derivative Financial Instruments Schedule of cash flow foreign exchange contracts Statement of Financial Performance (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Derivative Instruments, (Gain) Loss [Line Items]
Unrealized (Gain) Loss on Foreign Currency Derivatives, Net, before Tax	$ (5)	$ 2
Foreign Currency Cash Flow Hedge (Gain) Loss Reclassified to Earnings, Net	10	0
(Gain) Loss on Components Excluded from Assessment of Foreign Currency Cash Flow Hedge Effectiveness	$ 2	$ 0