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Capital Stock (Tables)

12 Months Ended

Dec. 31, 2011

Capital Stock [Abstract]

Summary of stock option activity and related information

		December 31, 2011								December 31, 2010								December 31, 2009
		Options (000’s) #				Weighted- Average Exercise  Price $				Options (000’s) #				Weighted- Average Exercise  Price $				Options (000’s) #				Weighted- Average Exercise  Price $
Outstanding-beginning of year			6,123				31.54				5,983				31.46				4,813				37.22
Granted			96				34.93				733				24.42				1,518				11.84
Exercised			(363	)			16.14				(380	)			15.12				(180	)			12.21
Forfeited / expired			(143	)			33.11				(213	)			29.00				(168	)			35.16
Outstanding-end of year			5,713				32.47				6,123				31.54				5,983				31.46
Exercisable-end of year			4,656				35.40				3,963				36.80				3,299				36.50

Non-vested stock option activity and related information

		December 31, 2011								December 31, 2010								December 31, 2009
		Options (000’s) #				Weighted- Average Grant  Date Fair Value $				Options (000’s) #				Weighted- Average Grant  Date Fair Value $				Options (000’s) #				Weighted- Average Grant  Date Fair Value $
Outstanding non-vested stock options- beginning of year			2,160				6.36				2,684				6.56				2,240				10.59
Granted			96				11.27				733				8.16				1,518				3.74
Vested			(1,071	)			6.18				(1,084	)			7.48				(974	)			10.88
Forfeited			(128	)			11.47				(173	)			10.06				(100	)			11.38
Outstanding non-vested stock options-end of year			1,057				6.40				2,160				6.36				2,684				6.56

Details regarding outstanding and exercisable stock options

		Outstanding Options												Exercisable Options
Range of Exercise Prices		Options (000’s) #				Weighted- Average Remaining  Life (Years)				Weighted- Average Exercise  Price $				Options (000’s) #				Weighted- Average Remaining  Life (Years)				Weighted- Average Exercise  Price $
$10.00 – $14.99			1,085				7.2				11.84				599				7.2				11.84
$15.00 – $19.99			439				0.8				19.57				439				0.8				19.57
$20.00 – $29.99			685				8.2				24.39				207				8.1				24.33
$30.00 – $34.99			444				3.8				33.86				351				2.3				33.58
$35.00 – $39.99			753				4.3				38.98				753				4.3				38.98
$40.00 – $44.99			1,276				6.2				40.41				1,276				6.2				40.41
$45.00 – $49.99			352				3.2				46.80				352				3.2				46.80
$50.00 – $59.99			676				5.2				51.40				676				5.2				51.40
$60.00 – $64.99			3				5.3				60.96				3				5.3				60.96
			5,713				5.5				32.47				4,656				4.9				35.40

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Tabular disclosure of the changes in outstanding nonvested shares.

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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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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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