Financing Arrangements and Derivative Financial Instruments Financing Arrangements and Derivative Financial Instruments (Derivatives - Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	$ 1,276		$ 1,289
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	20	(24)
Notional Amount of Foreign Currency Cash Flow Hedge Derivatives	127		138
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	$ (1)