Incentive Plans (Summary Of Activity Of Executive Continuity And Restricted Stock Award Program) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/units, outstanding	8,660,855	8,060,059	6,812,594
Shares/units, granted	3,148,445	3,641,911	4,314,376
Shares/units, shares issued	(3,262,760)	(2,871,367)	(2,565,971)
Shares/units, forfeited	(429,051)	(169,748)	(500,940)
Shares/Units, outstanding	8,117,489	8,660,855	8,060,059
Weighted average grant date fair value, outstanding	$ 28.37	$ 22.83	$ 23.31
Weighted average grant date fair value, granted	$ 40.76	$ 31.57	$ 28.04
Weighted average grant date fair value, shares issued	$ 32.48	$ 16.83	$ 32.43
Weighted average grant date fair value, outstanding	$ 31.20	$ 28.37	$ 22.83
Weighted average grant date fair value, forfeited	$ 34.58	$ 28.89	$ 25.07
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/units, outstanding	151,549	128,917	167,500
Shares/units, granted	67,100	88,715	21,500
Shares/units, shares issued	(88,775)	(61,083)	(55,083)
Shares/units, forfeited	(17,500)	(5,000)	(5,000)
Shares/Units, outstanding	112,374	151,549	128,917
Weighted average grant date fair value, outstanding	$ 30.49	$ 27.86	$ 26.95
Weighted average grant date fair value, granted	$ 44.41	$ 31.91	$ 27.01
Weighted average grant date fair value, shares issued	$ 32.30	$ 27.13	$ 24.84
Weighted average grant date fair value, outstanding	$ 36.24	$ 30.49	$ 27.86
Weighted average grant date fair value, forfeited	$ 37.75	$ 28.91	$ 26.78