Note 5. Shareholders' Equity Common Stock Repurchase Program (Details) - Jun. 30, 2015 - USD ($) $ in Millions	Total
Common Stock Repurchase Program [Abstract]
Stock repurchase program, authorized amount	$ 150
Stock repurchased during period, shares	830,000
Total shares repurchased under share repurchase program authorized June 2014, shares	1,185,000
Remaining authorized repurchase amount	$ 98