Note 4 - Fair Value Measurements (Details) - Reconciliation of Retirement Plan Assets in Level 3 (Fair Value, Inputs, Level 3 [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at December 31, 2011	$ 97	$ 89
Balance	104	97
Gains included in changes in net assets	12	8
Purchases		15
Sales	(5)	(15)
Global Hedged Equity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at December 31, 2011	38	30
Balance	43	38
Gains included in changes in net assets	5	3
Purchases		15
Sales		(10)
Absolute Return [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at December 31, 2011	36	34
Balance	39	36
Gains included in changes in net assets	3	2
Private Capital [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at December 31, 2011	23	25
Balance	22	23
Gains included in changes in net assets	4	3
Sales	$ (5)	$ (5)