Note 7 - Equity (Detail) - Reclassifications Out of Accumulated Other Comprehensive Loss (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Cash flow hedges
Interest rate contracts	$ 46		$ 47
Total cash flow hedges	164		139
Retirement benefit plan amortization of
Total retirement benefit plans	3	[1]
Total reclassification for the period	5	[1]
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | Interest Rate Swap [Member]
Cash flow hedges
Interest rate contracts	(3)	[2]
Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Cash flow hedges
Income tax benefit	1	[2]
Total cash flow hedges	(2)	[2]
Retirement benefit plan amortization of
Actuarial losses	(6)	[2],[3]
Prior service credits	1	[2],[3]
Total before income tax	(5)	[2]
Income tax benefit	2	[2]
Total retirement benefit plans	(3)	[2]
Total reclassification for the period	$ (5)	[2]

[1] All amounts are net of income taxes. Amounts in parentheses indicate debits to Accumulated Other Comprehensive Loss.

[2] Amounts in parentheses indicate debits, or reductions, to profit/loss and credits to Accumulated Other Comprehensive Income. Except for retirement benefit plan amounts, the profit/loss impacts are immediate.

[3] These accumulated OCI components are included in the computation of net periodic benefit cost. See Note 5, Employee Benefit Plans, for additional details about net periodic benefit cost.