Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives - Restructuring Accruals - Footnotes (Detail) - USD ($) $ in Millions	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 1,071	[1]	$ 798	[2]	$ 816
Other Current Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	816		628
Other Noncurrent Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 255		$ 169

[1] Included in Other current liabilities ($816 million) and Other noncurrent liabilities ($255 million).

[2] Included in Other current liabilities ($628 million) and Other noncurrent liabilities ($169 million).