Note 17 - Accumulated Other Comprehensive (Loss) Income (Detail) - Reclassifications out of Accumulated Other Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Pension and other postretirement benefit obligation changes:
	$ 7		$ 15
Amounts Reclassified From Accumulated Other Comprehensive Income [Member]
Pension and other postretirement benefit obligation changes:
Amortization of prior-service cost (credit)	(27)	[1]
Amortization of actuarial losses	71	[1]
Recognition of losses due to settlements	3	[1]
	47
	7
Reclassifications for the period	$ 40

[1] See Note 13, "Retirement Plans and Other Postretirement Benefits," regarding the pensions and other postretirement plan obligation changes.