Derivative Financial Instruments (Location And Amounts Of Pre-Tax Gains (Losses) On Cash Flow Hedge Derivatives Financial Instruments) (Details) - Cash Flow Hedging [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Net (Losses) and Gains Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (effective portion)	$ (5)	$ 6	$ (17)	$ 19
Cost Of Revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net (Losses) and Gains Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (effective portion)	(4)	5	(15)	17
Selling, General and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net (Losses) and Gains Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (effective portion)	(1)	1	(2)	2
Foreign Exchange Contract
Derivative Instruments, Gain (Loss) [Line Items]
Change in Derivative Gains and Losses Recognized in Accumulated Other Comprehensive Income (Loss) (effective portion)	$ 35	$ (66)	$ 68	$ (76)