Incentive Plans (Schedule Of Performance Unit Activity) (Details) (USD $)			1 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	May 31, 2011 Performance Unit Awards [Member]	Dec. 31, 2011 Performance Unit Awards [Member]		May 31, 2011 Performance Unit Awards [Member] Tunisia [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares/Units, Outstanding at beginning of year				263,729	[1]
Number of Units granted				43,495	[1]
Awards vested				(193,096)	[1],[2]
Number of Shares/Units, Outstanding at end of year				114,128	[1]
Weighted Average Grant-Date Fair Value, Outstanding at beginning of year				$ 28.91
Weighted Average Grant-Date Fair Value, Units granted				$ 134.68
Weighted Average Grant Date Fair Value, Units vested				$ 16.25	[2]
Weighted Average Grant-Date Fair Value, Outstanding at end of year				$ 90.64
Performance percentage of actual payout minimum				0.00%
Performance percentage to reach maximum				250.00%
Shares lapsed			14,807	178,289
Number of shares earned for each vested award				2.5
Common stock, shares issued	133,121,092	126,212,256		445,724		37,018

[1] These amounts reflect the number of performance units granted. The actual payout of shares may be between zero percent and 250 percent of the performance units granted depending upon the total shareholder return ranking of the Company compared to peer companies at the vesting date.

[2] On December 31, 2011, the service period lapsed on 178,289 of these performance unit awards. The lapsed units earned 2.5 shares for each vested award representing 445,724 aggregate shares of common stock issued in 2012. On May 31, 2011, 14,807 units lapsed as part of the Tunisian divesture and earned 2.5 shares for each vested award, representing 37,018 of aggregate shares of common stock.