Note 5. Employee Benefit Plans Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
Defined Benefit Plans, Estimated Total Employer Contributions in Current Fiscal Year			$ 142
Defined Benefit Plans, Contributions in Current Fiscal Year			137.2
Defined Contribution Plan, Retirement Plan Cost	$ 14.1	$ 14.1	$ 41.8	$ 41.3