Note 10 - Segment Information (Details) - Reconciliation of EBIT to Operating Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Reconciliation of EBIT to Operating Income [Abstract]
Operating income	$ 122	$ 91	$ 421	$ 353
Other income	7	9	12	13
EBIT	129	100	433	366
Interest expense	46	45	92	92
Earnings before income taxes	83	55	341	274
Income taxes	33	20	127	100
Net income	$ 50	$ 35	$ 214	$ 174