Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2011

Incentive Plans [Abstract]

Activity for nonvested performance share units

	Target Number of Shares			Weighted-average Grant Date Fair Value
Performance Shares
Nonvested at January 1, 2011		457,571			$42.99
Granted		394,770			$39.38
Vested		(219,601	)		$45.72
Canceled/forfeited		(25,201	)		$41.41
Nonvested at December 31, 2011		607,539			$39.73

Weighted-average fair value and weighted-average assumptions used in estimating the fair value of grants

		$000,0000		$000,0000		$000,0000
	2011		2010		2009
SOSARs
Fair value		$10.51		$12.05		$14.74
Risk-free interest rate		2.27%		3.15%		2.14%
Dividend yield		1.95%		2.00%		2.22%
Volatility		31.57%		27.58%		35.04%
Expected term		7.75 years		7.50 years		7.50 years

Stock option/SOSAR activity and changes during the year

	Number of Shares			Weighted-average Exercise Price		Weighted-average Remaining Contractual Life (Years)		Aggregate Intrinsic Value (in thousands)
Stock Options/SOSARs
Outstanding at January 1, 2011		6,479,296			$55.97
Granted		656,360			$35.38
Exercised		(85,394	)		$42.11
Forfeited or expired		(408,415	)		$46.58
Outstanding at December 31, 2011		6,641,847			$54.69		4.71		$7,202
Vested and expected to vest		6,768,683			$54.19		4.80		$8,575
Exercisable at December 31, 2011		5,414,035			$57.61		3.87		$4,874

Aggregate intrinsic values of options exercised

		$0000,00000		$0000,00000		$0000,00000
in thousands	2011		2010		2009
Aggregate intrinsic value of options   exercised		$164		$1,830		$4,903

Cash and stock consideration received and tax benefit realized from stock option/SOSAR exercises and compensation cost recorded

in thousands	2011		2010		2009
Stock Options/SOSARs
Cash and stock consideration received   from exercises	$	3,596	$	20,502	$	22,719
Tax benefit from exercises		66		733		1,965
Compensation cost		7,968		11,288		15,195