Restructuring Program - Additional Information (Details) - USD ($) $ in Millions				12 Months Ended				56 Months Ended	68 Months Ended
	Sep. 06, 2018	Aug. 31, 2016	May 06, 2014	Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2019
2014-2018 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Approved restructuring program costs		$ 5,700	$ 3,500
Reallocation of previously approved capital expenditures to be spent on restructuring program cash costs		600
2014-2018 Restructuring Program | Maximum
Restructuring Cost and Reserve [Line Items]
Capital expenditures, authorized amount		1,600	$ 2,200
2014-2018 Restructuring Program | Program charges
Restructuring Cost and Reserve [Line Items]
Approved restructuring program costs		4,100
2014-2018 Restructuring Program | Cash costs
Restructuring Cost and Reserve [Line Items]
Approved restructuring program costs		3,100
2014-2018 Restructuring Program | Non-cash costs
Restructuring Cost and Reserve [Line Items]
Approved restructuring program costs		$ 1,000
Simplify to Grow Program
Restructuring Cost and Reserve [Line Items]
Approved restructuring program costs	$ 7,700
Restructuring and related cost, cost incurred				$ 448		$ 631	$ 792	$ 4,300	$ 4,340	[1]
Restructuring charges				176	[2]	316	535		2,726	[1]
Cash spent				162		310
Non-cash asset write-downs				82	[3]	67
Restructuring reserve				301		373	464	$ 373	301
Implementation costs				272		$ 315	$ 257		1,614	[1]
Simplify to Grow Program | Maximum
Restructuring Cost and Reserve [Line Items]
Capital expenditures, authorized amount	2,300
Increase in restructuring program costs	1,300
Increase in capital expenditures	700
Simplify to Grow Program | Program charges
Restructuring Cost and Reserve [Line Items]
Approved restructuring program costs	5,400
Simplify to Grow Program | Cash costs
Restructuring Cost and Reserve [Line Items]
Approved restructuring program costs	4,100
Simplify to Grow Program | Non-cash costs
Restructuring Cost and Reserve [Line Items]
Approved restructuring program costs	$ 1,300
Simplify to Grow Program | Other current liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve				275					275
Simplify to Grow Program | Other liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve				$ 26					$ 26

[1] Includes all charges recorded since program inception on May 6, 2014 through December 31, 2019.

[2] During 2017-2019, our North America region implementation costs included incremental costs that we incurred related to renegotiating collective bargaining agreements that expired in February 2016 for eight U.S. facilities and related to executing business continuity plans for the North America business.

[3] We adopted the new lease accounting ASU as of January 1, 2019. The ASU requires recording onerous lease liabilities netted with right of use assets. Therefore, during the first quarter of 2019, we reclassified onerous lease liabilities that totaled $23 million as of March 31, 2019, from accrued liabilities and other accrued liabilities to operating lease right of use assets.