Restructuring Costs (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, cost incurred to date	$ 300		$ 300
Costs incurred	65	$ 28	118	$ 58
Severance and Lease Exit Charges
Restructuring Cost and Reserve [Line Items]
Costs incurred	$ 48		$ 72
Minimum
Restructuring Cost and Reserve [Line Items]
Estimated remaining costs					$ 375
Maximum
Restructuring Cost and Reserve [Line Items]
Estimated remaining costs					$ 400