Note 18 - Earnings Per Common Share (Details) - Reconciliation of Amounts Used in Basic and Diluted Earnings Per Common Share (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011
Reconciliation of Amounts Used in Basic and Diluted Earnings Per Common Share [Abstract]
Basic earnings per common share (in Dollars)	$ 421	$ 408	$ 638	$ 494	$ 155	[1]	$ 533	[1]	$ 474	[1]	$ 474	[1]	$ 1,961	$ 1,636	[1]	$ 2,817
Basic earnings per common share													1,452	1,494		1,562
Basic earnings per common share (in Dollars per share)	$ 0.30	$ 0.28	$ 0.43	$ 0.33	$ 0.11	[1]	$ 0.36	[1]	$ 0.31	[1]	$ 0.31	[1]	$ 1.35	$ 1.10	[1]	$ 1.80
Employee stock options and awards													10	12		21
Diluted earnings per common share (in Dollars)													$ 1,961	$ 1,636		$ 2,817
Diluted earnings per common share													1,462	1,506		1,583
Diluted earnings per common share (in Dollars per share)	$ 0.30	$ 0.28	$ 0.43	$ 0.33	$ 0.10	[1]	$ 0.36	[1]	$ 0.31	[1]	$ 0.31	[1]	$ 1.34	$ 1.09	[1]	$ 1.78

[1] Includes impact of defined benefit pension plan methodology change implemented in the first quarter of 2013 and retrospectively applied to prior periods.