Note 4 - Leases (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2020
Operating Lease, Expense	$ 10	$ 10	$ 29	$ 31
Operating Lease, Payments	10	$ 11	32	34
Operating Lease, Impairment Loss			15	$ 0
Operating Lease, Liability, Total	$ 194		194
Sell and Leaseback Office and Warehouse Facilities [Member] | Forecast [Member]
Operating Lease, Liability, Total					$ 23
Selling, General and Administrative Expenses [Member]
Operating Lease, Impairment Loss			15
Selling, General and Administrative Expenses [Member] | UNITED STATES
Operating Lease, Impairment Loss			2
Selling, General and Administrative Expenses [Member] | CANADA
Operating Lease, Impairment Loss			1
Selling, General and Administrative Expenses [Member] | International [Member]
Operating Lease, Impairment Loss			$ 12
Minimum [Member]
Lessee, Operating Lease, Renewal Term (Year)	1 year		1 year
Maximum [Member]
Lessee, Operating Lease, Renewal Term (Year)	15 years		15 years
Lessee, Operating Lease, Term of Contract (Year)	30 years		30 years