Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended			12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Jun. 30, 2024	Dec. 31, 2023	Dec. 31, 2022	Jun. 30, 2024	Jun. 30, 2023
Income Taxes
Effective Income Tax Rate Reconciliation, Percent	27.70%	5.40%		22.40%	30.00%
Goodwill impairment				$ 581
Income Tax Expense (Benefit)	$ 136	$ (7)		104	$ (8)
Unrecognized tax benefits	959			959			$ 1,000
Unrecognized tax benefits that would impact effective tax rate	864			864			873
Unrecognized tax benefits, interest and penalties accrued	52			52			65
Medical Unit
Income Taxes
Goodwill impairment				581	$ 863
Medical Unit Goodwill Impairment [Member] | Subsequent Event
Income Taxes
Income Tax Expense (Benefit)			$ 65
Forecast [Member] | Medical Unit Goodwill Impairment [Member]
Income Taxes
Income Tax Expense (Benefit)						$ (45)
Minimum
Income Taxes
Estimated range of decrease in unrecognized tax benefits within the next 12 months	0			0
Maximum
Income Taxes
Estimated range of decrease in unrecognized tax benefits within the next 12 months	30			30
CareFusion [Member]
Income Taxes
Indemnification Receivable	$ 20			$ 20			$ 82