Segment Reporting - Operating Income by Segment (Details) - USD ($) $ in Millions		3 Months Ended				12 Months Ended
		Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Operating income						$ 3,312	$ 3,462	$ 2,554
Unrealized gains/(losses) on hedging activities (mark-to-market impacts)						141	(96)	(94)
General corporate expenses						(335)	(282)	(287)
Amortization of intangibles						(176)	(178)	(176)
Net gain on divestitures		$ 2	$ 187	$ (3)	$ 0	0	186	9
Acquisition-related costs						(13)	0	(1)
Benefit plan non-service income	[1]					50	44	15
Interest and other expense, net						(520)	(382)	(1,115)
Earnings before income taxes						2,842	3,124	1,454
Latin America
Segment Reporting Information [Line Items]
Operating income						410	564	272
AMEA
Segment Reporting Information [Line Items]
Operating income						702	514	505
Europe
Segment Reporting Information [Line Items]
Operating income						1,734	1,610	1,198
North America
Segment Reporting Information [Line Items]
Operating income						$ 849	$ 1,144	$ 1,128

[1] During the first quarter of 2018, in connection with adopting a new pension cost classification accounting standard, we reclassified certain of our benefit plan component costs other than service costs out of operating income into a new line item, benefit plan non-service income, on our consolidated statements of earnings. As such, we have recast our historical operating income and segment operating income to reflect this reclassification, which had no impact to earnings before income taxes or net earnings.