Components of Accumulated Other Comprehensive Loss, Net Components of Accumulated Other Comprehensive Loss, Net (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Components of Accumulated Other Comprehensive Loss, Net [Abstract]
Unrecognized amounts on retirement benefits, net of tax	$ 12	$ 9

The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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