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Note 21 - Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

		Shares				Weighted-Average Exercise Price Per Share				Aggregate Intrinsic Value (in millions)
Options outstanding, January 1, 2014			15,374,145			$	28.79			$	13.1
Exercised			(1,474,432	)		$	16.19			$	9.4
Forfeited			(2,005,952	)		$	28.68
Options outstanding, December 31, 2014			11,893,761			$	30.23			$	29.8
Exercised			(1,019,240	)		$	18.36			$	7.4
Forfeited			(1,862,080	)		$	32.55
Options outstanding, December 31, 2015			9,012,441			$	31.09			$	27.4
Exercised			(1,167,819	)		$	18.03			$	12.4
Forfeited			(1,830,893	)		$	39.69
Options outstanding, December 31, 2016			6,013,729			$	32.09			$	12.1
Options exercisable (fully vested) -
December 31, 2014			10,159,570			$	31.96			$	19.9
December 31, 2015			7,617,882			$	32.90			$	20.0
December 31, 2016			5,144,416			$	32.56			$	11.3

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

		201 6				201 5				2014
Restricted stock outstanding as of January 1,			1,712,534				1,911,145				1,591,082
Granted			756,530				729,160				804,465
Vested			(520,539	)			(875,202	)			(418,309	)
Forfeited			(17,793	)			(52,569	)			(66,093	)
Restricted stock outstanding as of December 31,			1,930,732				1,712,534				1,911,145

Performance Shares [Member]

Notes Tables

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		201 6				201 5						201 4
Stock price		$	26.29			$			26.83			$			21.49
Dividend yield (1)			0	%					0	%					0	%
Risk-free rate			0.87	%					0.98	%					0.65	%
Volatility			18.80	%					16.81	%					25.93	%
Term of the award (years)			2.88					1.88,	2.88				0.88,	1.88,	2.88

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

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