Incentive Plans (Schedule Of Performance Unit Activity) (Details) (USD $)			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Performance Units [Member] Rate
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares/Units, Outstanding at beginning of year			91,370	[1]
Number of Units granted			94,917	[1]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period			(10,842)	[1]
Awards vested			(40,969)	[1]
Number of Shares/Units, Outstanding at end of year			134,476	[1]
Weighted Average Grant-Date Fair Value, Outstanding at beginning of year			$ 154.53
Weighted Average Grant-Date Fair Value, Units granted			$ 189.23
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value			$ 172.02
Weighted Average Grant Date Fair Value, Units vested			$ 134.68	[2]
Weighted Average Grant-Date Fair Value, Outstanding at end of year			$ 183.66
Performance percentage of actual payout minimum			0.00%
Performance percentage to reach maximum			250.00%
Number of shares earned for each vested award			2.5
Common stock, shares issued	145,833,707	134,966,740	102,424

[1] (a)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] (b)On December 31, 2013, the service period lapsed on 40,969 of these performance unit awards. The lapsed units earned 2.5 shares for each vested award representing 102,424 aggregate shares of common stock issued on January 2, 2014.