Retirement Benefits (Schedule of Estimated Amounts That Will Be Amortized from Accumulated Other Comprehensive in the Next Fiscal Year) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012 U.S. Pension Benefits [Member]	Dec. 31, 2011 Non- U.S Pension Benefits [Member]	Dec. 31, 2011 Non- U.S Postretirement Benefits [Member]	Dec. 31, 2012 U.S. Postretirement Benefits [Member]
Prior service credit	$ (16)	$ 3	$ 0	$ (12)
Net actuarial loss	146	(116)	(1)	(1)
Projected cost (credit)	$ 130	$ (113)	$ (1)	$ (13)

The amounts in accumulated other comprehensive income related to gains and losses that are not recognized immediately and are expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

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The amounts in accumulated other comprehensive income related to prior service cost or credit expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

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- Definition

The aggregate amount in accumulated other comprehensive income expected to be recognized as a component of net periodic benefit cost over the fiscal year that follows the most recent annual statement of financial position presented, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation.

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