Note 1. Summary of Significant Accounting Policies Change in Depreciable Lives (Details) - Subsequent Event Type [Domain] - Equipment Leased to Other Party [Member] $ in Millions	Jan. 01, 2020 USD ($)
Change in Accounting Estimate [Line Items]
Property, Plant and Equipment, Useful Life	37 years
Minimum [Member]
Change in Accounting Estimate [Line Items]
Depreciation	$ 27.0
Maximum [Member]
Change in Accounting Estimate [Line Items]
Depreciation	$ 33.0

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Name:	us-gaap_Depreciation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration