Other Accrued Expenses - Summary of Other Accrued Expenses (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Payables and Accruals [Abstract]
Professional liability risks	$ 587	$ 532
Defined contribution benefit plans	704	668
Right-of-use operating leases	343	363
Taxes other than income	419	382
Interest	502	414
Employee medical benefits	206	199
Other	1,138	1,313
Other accrued expenses	$ 3,899	$ 3,871