Note 7 - Equity (Details) - Reclassifications Out of Accumulated Other Comprehensive Loss (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Cash flow hedges
Income tax benefit					$ 1
Total cash flow hedges	1				(1)
Retirement benefit plan amortization of
Total retirement benefit plans	(4)		(7)		(7)		(8)
Total reclassification for the period	(3)		(7)		(8)		(8)
Cash Flow Hedges [Member] | Interest Rate Swap [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Cash flow hedges
Interest rate contracts	1	[1]		[1]	(2)	[1]		[1]
Reclassification out of Accumulated Other Comprehensive Income [Member]
Cash flow hedges
Income tax benefit		[1]		[1]	1	[1]		[1]
Total cash flow hedges	1	[1]		[1]	(1)	[1]		[1]
Retirement benefit plan amortization of
Actuarial losses	(7)	[1],[2]	(10)	[1],[2]	(13)	[1],[2]	(12)	[1],[2]
Prior service credits		[1],[2]		[1],[2]	2	[1],[2]		[1],[2]
Total before income tax	(7)	[1]	(10)	[1]	(11)	[1]	(12)	[1]
Income tax benefit	3	[1]	3	[1]	4	[1]	4	[1]
Total retirement benefit plans	(4)	[1]	(7)	[1]	(7)	[1]	(8)	[1]
Total reclassification for the period	$ (3)	[1]	$ (7)	[1]	$ (8)	[1]	$ (8)	[1]

[1] Amounts in parentheses indicate debits, or reductions, to profit/loss and credits to accumulated other comprehensive loss. Except for retirement benefit plan amounts, the profit/loss impacts are immediate.

[2] Amortization of these accumulated other comprehensive loss components is included in the computation of net periodic benefit cost. See Note 5 for additional details about net periodic benefit cost.