10-Q Business Acquisitions (Assets Liabilities Acquired) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Goodwill	$ 25,291	$ 25,291	$ 24,383	$ 24,228	$ 21,691
Integra Managed Care [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired		89
Indefinite-lived Intangible Assets Acquired		250
Goodwill, Acquired During Period		139
BioPlus
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 820
Goodwill, Acquired During Period		$ 877