Note 2 - Cash, Cash Equivalents and Restricted Cash (Tables)

12 Months Ended

Dec. 31, 2017

Cash And Cash Equivalents [Abstract]

Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash [Text Block]

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Statement of Financial Position that sums to the total of such amounts shown in the Statement of Cash Flows:

	As of December 31,
(in millions)	2017		2016
Cash and cash equivalents	$	344	$	434
Restricted cash included in Other current assets		8		8
Long-term restricted cash		17		36
Total cash, cash equivalents and restricted cash shown in the Statement of Cash Flows	$	369	$	478