Note 1 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Estimated recoveries	$ 20	$ 21
Operating or finance lease classification criteria description	The primary criteria used to classify transactions as operating or finance leases are: (1) whether the ownership transfers at the end of the lease, (2) whether the lease term is equal to or greater than 75% of the economic life of the asset, and (3) whether the present value of the minimum lease payments is equal to or greater than 90% of the fair value of the asset at inception of the lease.
Advertising Expense	$ 2	2	$ 5
Minimum [Member]
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Revenue recognition payment terms	30 days
Interest for payment terms	1 year
Minimum [Member] | Equipment Subject to Operating Leases [Member]
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum [Member]
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Revenue recognition payment terms	60 days
Maximum [Member] | Equipment Subject to Operating Leases [Member]
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Property, Plant and Equipment, Useful Life	7 years
Other Long-Term Assets [Member]
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Estimated recoveries	$ 18	18
Other Current Assets [Member]
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Estimated recoveries	$ 2	$ 3