Restructuring and Restructuring-Related Activities - Schedule of Total Pretax Charges Associated by Major Type of Cost Expected Results Cash Outlays (Details) $ in Millions	Sep. 30, 2023 USD ($)
Minimum
Restructuring Cost and Reserve [Line Items]
Total estimated amount expected to be incurred	$ 34
Maximum
Restructuring Cost and Reserve [Line Items]
Total estimated amount expected to be incurred	36
Workforce | Minimum
Restructuring Cost and Reserve [Line Items]
Total estimated amount expected to be incurred	13
Workforce | Maximum
Restructuring Cost and Reserve [Line Items]
Total estimated amount expected to be incurred	14
Facilities-related | Minimum
Restructuring Cost and Reserve [Line Items]
Total estimated amount expected to be incurred	5
Facilities-related | Maximum
Restructuring Cost and Reserve [Line Items]
Total estimated amount expected to be incurred	5
Other | Minimum
Restructuring Cost and Reserve [Line Items]
Total estimated amount expected to be incurred	0
Other | Maximum
Restructuring Cost and Reserve [Line Items]
Total estimated amount expected to be incurred	0
Business Transformation Charges | Minimum
Restructuring Cost and Reserve [Line Items]
Total estimated amount expected to be incurred	16
Business Transformation Charges | Maximum
Restructuring Cost and Reserve [Line Items]
Total estimated amount expected to be incurred	$ 17