Note 2 - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Cash And Cash Equivalents [Abstract]
Cash and cash equivalents	$ 196		$ 233
Restricted cash - current portion	7		12
Restricted cash	53		45
Total cash, cash equivalents and restricted cash shown in the Statement of Cash Flows	$ 256	[1]	$ 290	[1]	$ 267

[1] Refer to Note 2, “Cash, Cash Equivalents and Restricted Cash” for a breakdown of cash, cash equivalents and restricted cash.