Accrued Expenses - Summary of Other Accrued Expenses (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Professional liability risks	$ 532	$ 515
Defined contribution benefit plans	668	612
Right-of-use operating leases	363	364
Taxes other than income	382	371
Interest	414	402
Employee medical benefits	199	182
Other	1,313	1,135
Other accrued expenses	$ 3,871	$ 3,581