Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Schedule Of Quarterly Financial Data

	2016												2015
	4th			3rd			2nd			1st			4th			3rd			2nd			1st
Total revenues		$23,286			$23,898			$24,755			$22,632			$23,573			$25,849			$24,543			$22,149
Total costs and expenses	(19,464		)	(19,904		)	(22,325		)	(19,097		)	(20,642		)	(21,600		)	(21,350		)	(18,496		)
Earnings from operations	2,183			2,282			(419		)	1,788			1,161			2,580			1,683			2,019
Net earnings/(loss)	1,631			2,279			(234		)	1,219			1,026			1,704			1,110			1,336
Basic earnings per share	2.63			3.64			(0.37		)	1.85			1.52			2.50			1.61			1.89
Diluted earnings per share	2.59			3.60			(0.37		)	1.83			1.51			2.47			1.59			1.87
Cash dividends declared per share	2.51						2.18						2.00						1.82
Common stock sales price per share:
High	160.07			139.45			137.89			141.70			150.59			149.18			155.50			158.83
Low	130.74			123.96			122.35			102.10			128.56			115.14			138.44			126.18
Quarter end	155.68			131.74			129.87			126.94			144.59			130.95			138.72			150.08