Note 2 - Revenue (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Contract with Customer, Liability, Customer Deposits	$ 1,200		$ 1,200		$ 1,300
Increase (Decrease) in Contract with Customer, Liability	48	$ 28	131	$ 123
Contract with Customer, Liability, Noncurrent	1,003		1,003		1,072
Contract with Customer, Liability, Current	190		190		223
Contract with Customer, Liability, Total	892		892		912
Contract With Customer Liability, Deferred Revenue, Noncurrent	780		780		764
Contract With Customer Liability, Deferred Revenue, Current	$ 112		$ 112		$ 148
Maximum [Member]
Long Term Supply, Commitment Period (Year)			10 years