Share-Based Compensation And Capital Stock Narrative (Details) (USD $)	1 Months Ended	12 Months Ended
	Feb. 29, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash dividends declared per share	$ 0.185	$ 0.74	$ 0.74
Payments of Dividends, Common Stock		$ 43,700,000	$ 43,800,000
Number of Shares Authorized		4,600,000
Number of Shares Available for Grant		1,800,000
Proceeds from exercise of stock options		3,845,000	2,457,000	9,158,000
Stock Repurchased During Period, Shares	200,000
Common stock purchased under stock repurchase program, value	7,300,000	53,414,000	11,165,000	59,124,000
Stock Repurchase Program [Member]
Stock Repurchased During Period, Shares		1,600,000	300,000
Common stock purchased under stock repurchase program, value		51,000,000	8,700,000
Stock Repurchase Program Aggregate Total [Member]
Stock Repurchased During Period, Shares		44,800,000
Common stock purchased under stock repurchase program, value		1,100,000,000
Stock Options
Aggregate intrinsic value of stock, options, outstanding		9,100,000
Aggregate intrinsic value of the stock options, exercisable		5,600,000
Total intrinsic value of options exercised		2,800,000	2,000,000	12,600,000
Proceeds from exercise of stock options		3,800,000	2,500,000	9,200,000
Stock options exercised		175,386	123,109	764,612
Minimum Tax Withholding Requirements [Member] [Member]
Common stock redeemed, shares		67,426	76,485
Common stock redeemed, value		$ 2,600,000	$ 2,500,000
Prior To Stock Split [Member] | Stock Repurchase Program Aggregate Total [Member]
Stock Repurchased During Period, Shares		33,000,000