Note 9 - Equity (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

In millions	Cash flow hedges			Retirement benefit plans			Accumulated other comprehensive
As of Dec. 31, 2009	$	(2	)	$	(114	)	$	(116	)
Other comprehensive loss		(5	)		(28	)		(33	)
Purchase of additional 15% ownership interest in SouthStar		(1	)		0			(1	)
As of Dec. 31, 2010		(8	)		(142	)		(150	)
Other comprehensive loss		(2	)		(65	)		(67	)
As of Dec. 31, 2011		(10	)		(207	)		(217	)
Other comprehensive income (loss)		4			(5	)		(1	)
As of Dec. 31, 2012	$	(6	)	$	(212	)	$	(218	)