Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Schedule Of Quarterly Financial Data

	2015												2014
	4th			3rd			2nd			1st			4th			3rd			2nd			1st
Total revenues		$23,573			$25,849			$24,543			$22,149			$24,468			$23,784			$22,045			$20,465
Total costs and expenses	(20,642		)	(21,600		)	(21,350		)	(18,496		)	(20,711		)	(20,075		)	(18,670		)	(17,296		)
Earnings from operations	1,161			2,580			1,683			2,019			2,025			2,119			1,787			1,542
Net earnings	1,026			1,704			1,110			1,336			1,466			1,362			1,653			965
Basic earnings per share	1.52			2.50			1.61			1.89			2.05			1.88			2.26			1.30
Diluted earnings per share	1.51			2.47			1.59			1.87			2.02			1.86			2.24			1.28
Cash dividends declared per share	2.00						1.82						1.64						1.46
Common stock sales price per share:
High	150.59			149.18			155.50			158.83			135.78			130.58			138.39			144.57
Low	128.56			115.14			138.44			126.18			116.32			117.87			121.92			118.77
Quarter end	144.59			130.95			138.72			150.08			129.98			127.38			127.23			125.49