Additional Financial Information Accumulated Other Comprehensive (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Changes in accumulated other comprehensive income, Gross
Accumulated other comprehensive income at the beginning of the period	$ (31)
Adjustments for pension and other post-employment benefits, net of amortization	(3)	(1)
Accumulated other comprehensive income at the end of the period	(28)
Changes in accumulated other comprehensive income, Taxes
Accumulated Other Comprehensive Income (Loss) Defined Benefit Pension and Other Postretirement Plans Tax	(3)
Adjustments for pension and other post-employment benefits, net of amortization	(1)	0
Accumulated Other Comprehensive Income (Loss) Defined Benefit Pension and Other Postretirement Plans Tax	(4)
Changes in accumulated other comprehensive income Net
Accumulated other comprehensive income at the beginning of the period	(34)
Adjustments for pension and other post-employment benefits, net of amortization	2	1
Accumulated other comprehensive income at the end of the period	$ (32)

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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