Consolidated Statements Of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Reinvested Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	ASU 2016-16 Income Taxes [Member] Reinvested Earnings [Member]
Balance at Dec. 31, 2015	$ 17,915	$ 3,180	$ 16,865	$ (2,146)	$ 16
Balance, shares at Dec. 31, 2015		595
Comprehensive income
Net earnings	1,288		1,279		9
Other comprehensive income (loss)	(453)			(452)	(1)
Total comprehensive income	835
Cash dividends paid	(701)		(701)
Treasury stock purchases	(1,000)	$ (1,000)
Treasury stock purchases, shares		(25)
Stock compensation expense	74	$ 74
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		1
Other	58	$ 73	1		(16)
Other, shares		2
Balance at Dec. 31, 2016	17,181	$ 2,327	17,444	(2,598)	8
Balance, shares at Dec. 31, 2016		573
Cumulative Effect of New Accounting Principle in Period of Adoption	(7)					$ (7)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	17,174		17,437
Comprehensive income
Net earnings	1,602		1,595		7
Other comprehensive income (loss)	963			961	2
Total comprehensive income	2,565
Cash dividends paid	(730)		(730)
Treasury stock purchases	(750)
Stock Repurchased During Period, Value			(750)
Treasury stock purchases, shares		(18)
Stock compensation expense	66	$ 66
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		1
Other	(3)	$ 5	0		(8)
Other, shares		1
Balance at Dec. 31, 2017	18,322	$ 2,398	17,552	(1,637)	9
Balance, shares at Dec. 31, 2017		557
Comprehensive income
Net earnings	1,815		1,810		5
Other comprehensive income (loss)	(469)			(469)	0
Total comprehensive income	1,346
Cash dividends paid	(758)		(758)
Stock Repurchased During Period, Shares		(2)
Stock Repurchased During Period, Value	(77)		(77)
Stock compensation expense	109	$ 109
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		2
Other	54	$ 53	0		1
Other, shares		2
Balance at Dec. 31, 2018	$ 18,996	$ 2,560	$ 18,527	$ (2,106)	$ 15
Balance, shares at Dec. 31, 2018		559