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, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Net Gains Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (effective portion)	$ 6	$ 14	$ 19	$ 35
Cost Of Revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net Gains Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (effective portion)	5	12	17	30
Selling, General and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net Gains Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (effective portion)	1	2	2	5
Foreign Exchange Contract
Derivative Instruments, Gain (Loss) [Line Items]
Change in Derivative Gains and Losses Recognized in Accumulated Other Comprehensive Income (Loss) (effective portion)	$ (66)	$ (3)	$ (76)	$ 14