Note 2 - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019	[1]	Dec. 31, 2018
Cash And Cash Equivalents [Abstract]
Cash and cash equivalents	$ 362		$ 196
Restricted cash reported in Other current assets	7		7
Restricted cash	54		53
Total cash, cash equivalents and restricted cash shown in the Statement of Cash Flows	$ 423	[1]	$ 256	[1]	$ 290		$ 267

[1] ^{Refer to Note 2, “Cash, Cash Equivalents and Restricted Cash” for the components of cash, cash equivalents and restricted cash.}