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]	ASU 2016-16 Income Taxes [Member] Reinvested Earnings [Member]
Balance at Dec. 31, 2014	$ 19,630	$ 5,115	$ 15,701	$ (1,241)	$ 55
Balance, shares at Dec. 31, 2014		637
Comprehensive income
Net earnings	1,846		1,849		(3)
Other comprehensive income (loss)	(906)			(905)	(1)
Total comprehensive income	940
Cash dividends paid	(687)		(687)
Treasury stock purchases	(2,040)	$ (2,040)
Treasury stock purchases, shares		(43)
Stock compensation expense	79	$ 79
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		1
Other	(7)	$ 26	2		(35)
Other, shares		0
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)
Common Stock, Shares, Outstanding		573
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	17,174	$ 2,327	17,437	(2,598)	8
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)
Stock Repurchased During Period, Shares		18
Stock Repurchased During Period, Value	(750)		(750)
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
Cumulative Effect of New Accounting Principle in Period of Adoption							$ (7)