Income Taxes (Schedule Of The Provision For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 1	$ 4	$ 1
Foreign	34	24	28
Current income taxes	35	28	29
Deferred:
Federal	30	14	21
Foreign	(3)	1	(3)
Deferred income taxes	27	15	18
Income tax expense	$ 62	$ 43	$ 47

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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