Note 1 - Basis of Presentation and Recent Accounting Pronouncements (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Net Asset, Recognized Loss	$ 12	$ (21)	$ 5	$ (98)
ASU 2015-17 [Member]
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Decrease in current deferred income tax assets			(19)
Increase in noncurrent deferred income tax assets			19
RED-Rochester, LLC [Member]
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Noncontrolling Interests in Variable Interest Entity	27		27		$ 25
Net Asset, Recognized Loss			(19)
RED-Rochester, LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	67		67		69
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	$ 25		$ 25		$ 13