Note 10. Income Taxes Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Deferred income tax assets:
Net operating loss carryforwards		$ 654	$ 810
Tax credit carryforwards		28	17
Accrued liabilities		123	103
Minimum pension obligation		23	24
Provision for doubtful accounts		18	22
Liability for unrecognized tax benefits		6	8
Deferred Tax Assets, Derivative Instruments		11	6
Other		1	0
Total deferred tax assets		864	990
Less: valuation allowance		(11)	(10)
Total deferred income tax assets after valuation allowance		853	980
Deferred income tax liabilities:
Depreciation and amortization		1,105	1,122
Change in tax return accounting methods		9	18
Prepaid expenses		2	2
Undistributed foreign earnings		2	6
Basis difference in investment in joint ventures		1	2
Total deferred tax liabilities		1,119	1,150
Net deferred income tax liabilities		(266)	(170)
Deferred Tax Assets, Net, Classification [Abstract]
Deferred Tax Assets, non-current		1	1
Deferred income taxes		267	171
Net deferred income tax liabilities		(266)	$ (170)
Operating Loss Carryforwards		1,650
Excess tax deductions not reflected in NOL deferred tax assets		11
Amount equity will be reduced by when NOL deferred tax assets are realized		$ 4
Decrease in the valuation allowance amount	$ 341