Cost Reduction Programs and Other Charges - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) employmentPosition	Dec. 31, 2020 USD ($) employmentPosition	Dec. 31, 2019 USD ($) employmentPosition
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	$ 273	$ 506	$ 567
Cost reduction programs and other charges, after-tax and noncontrolling interest	279	372	444
Merger-related divestitures			263
Income tax expense (benefit)	1,262	847	769
Asset impairment charges			73
Asset impairment charges, net of tax			42
Cash requirement for the cost reduction program and other charges	259
Cash payments	175	221
Cost Reduction Program
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	338	391	304
Cost reduction program charges	338	391	304
Cost reduction program charges, net of tax	253	277	233
Cash payments	153	176
APAC
Restructuring Cost and Reserve [Line Items]
Other than temporary impairment related to APAC joint venture	35
Other than temporary impairment related to APAC joint venture, after tax	35
Severance costs | Cost Reduction Program
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	$ 259	$ 298	$ 204
Number of positions eliminated | employmentPosition	2,000	3,100	2,400
Cash payments	$ 138	$ 156
Other cost reduction charges | Cost Reduction Program
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	79	93	$ 100
Cash payments	15	20
Merger related and other charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	(65)	115	263
Other charges, merger related, net of tax	26	95	$ 211
Gain (loss) from deconsolidation of joint venture	52
Income tax expense (benefit)	56
Effective income tax rate reconciliation, change in enacted tax rate, amount	83
Effective income tax rate reconciliation, tax settlement, amount	33
Cash payments	$ 22	$ 45