Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives - Restructuring Accruals - Footnotes (Detail) - USD ($) $ in Millions	Jun. 30, 2019		Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 797	[1]	$ 1,252	[2]
Other Current Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	593		823
Other Noncurrent Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 204		$ 428

[1] Included in Other current liabilities ($593 million) and Other noncurrent liabilities ($204 million).

[2] Included in Other current liabilities ($823 million) and Other noncurrent liabilities ($428 million).