Fair Value Measurements and Fair Value of Financial Instruments Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - Contingent Consideration [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 70	$ 55
Acquisitions (including assumed balances)	403	28
Payments	(109)	(4)
Changes in fair value included in earnings	(47)	(9)
Ending balance	$ 317	$ 70
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Selling, general and administrative expenses	Selling, general and administrative expenses