Supplemental Disclosures (Supplemental Operating and Financing Cash Flow Items) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating:
Contingent consideration payments for prior year acquisitions	$ (38)	$ (49)	$ (48)
Receipt of contingent consideration for dispositions	0	19	0
Acquisition/disposition related net charges for adjustments	49	57	26
Adjustments and payments related to contingent consideration	11	27	(22)
Financing:
Contingent consideration for prior year acquisitions	(32)	(28)	(54)
Deferred consideration related to prior year acquisitions	(126)	(89)	(68)
Payments of deferred and contingent consideration for acquisitions	(158)	(117)	(122)
Receipt of contingent consideration for dispositions	$ 3	$ 71	$ 0