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Note 10. Income Taxes Pre-tax Income (Loss) for Domestic and Foreign Operations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
Domestic $ 290 $ 230 $ 192
Foreign 8 4 9
Pretax income (loss) $ 298 $ 234 $ 201