Fair Value Measurements (Valuation Of Financial Instruments By Pricing Categories) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2024	Jun. 30, 2023	Dec. 31, 2023
Assets Measured at Fair Value
Available-for-sale securities, current	$ 77		$ 82
Total assets measured at fair value	2,796		3,378
Contingent consideration:
Total liabilities measured at fair value	561		595
Fair Value, Inputs, Level 1
Assets Measured at Fair Value
Cash and cash equivalents	2,330		2,971
Trading marketable securities	234		209
Total assets measured at fair value	2,564		3,180
Liabilities
Deferred compensation arrangements	234		209
Contingent consideration:
Total liabilities measured at fair value	234		209
Fair Value, Inputs, Level 2
Assets Measured at Fair Value
Available-for-sale securities, current	77		82
Total assets measured at fair value	232		198
Contingent consideration:
Total liabilities measured at fair value	56		97
Fair Value, Inputs, Level 2 | Foreign currency exchange forward contracts
Assets Measured at Fair Value
Derivative asset	155		116
Liabilities
Foreign currency exchange forward contracts	56		97
Fair Value, Inputs, Level 2 | Corporate and asset-backed debt securities
Assets Measured at Fair Value
Available-for-sale securities, current	42		43
Fair Value, Inputs, Level 2 | United States agency debt securities
Assets Measured at Fair Value
Available-for-sale securities, current	1		4
Fair Value, Inputs, Level 2 | United States treasury debt securities
Assets Measured at Fair Value
Available-for-sale securities, current	30		31
Fair Value, Inputs, Level 2 | Certificates of deposit
Assets Measured at Fair Value
Available-for-sale securities, current	4		4
Fair Value, Inputs, Level 3
Contingent consideration:
Beginning	289	$ 121
Additions	0	192
Change in estimate and foreign exchange	(17)	(2)
Settlements	(1)	$ (22)
Ending	271
Total liabilities measured at fair value	$ 271		$ 289