Stock Options and Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2011

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

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

Weighted Average Black-Scholes Assumptions	2011		2010		2009
Risk-free interest rate	2.3	%	3.3	%	1.9	%
Expected volatility	36.5	%	40.3	%	37.5	%
Expected dividend yield	2.0	%	1.8	%	5.5	%
Expected option life, in years	5		7		5

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

The following table summarizes stock option activity during 2011:

Thousands of shares, except per share data	Number of Options		Weighted- Average Exercise Price
Outstanding at January 1	3,428		$	71.20
Granted	625		85.46
Exercised	(244	)	46.63
Canceled or expired	(346	)	120.64
Outstanding at December 31	3,463		$	70.63
Exercisable at December 31	2,484		$	73.10

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

The following table summarizes stock unit activity during 2011:

Stock units in thousands, except per-share data	Number of Stock Units		Weighted- Average Grant Date Fair Value
Non-vested, at January 1	1,486		$	60.60
Granted	297		82.55
Canceled	(66	)	70.07
Vested and transferred to unrestricted	(243	)	63.03
Non-vested, at December 31	1,474		$	64.32