Income Taxes - Reconciliation of United States Federal Statutory Tax Rate to Effective Tax Rate on Income Before Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
U.S. statutory tax rate	$ 657	$ 567	$ 406
State and local taxes, net of federal tax benefit	93	74	49
Net U.S. tax effect of cross-border tax laws	(4)	(14)	2
Other nontaxable or nondeductible items	30	22	4
Excess tax benefits on share-based payments	(33)	(27)	(15)
Tax credits - research credit	(12)	(15)	(19)
Foreign Tax Expense
Tax expense (benefit) relating to foreign operations	(8)	13	16
Changes in unrecognized tax benefits	(55)	20	(116)
Total provision for income taxes	$ 668	$ 640	$ 327
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. statutory tax rate	21.00%	21.00%	21.00%
State and local taxes, net of federal tax benefit	3.00%	2.70%	2.50%
Net U.S. tax effect of cross-border tax laws	(0.10%)	(0.50%)	0.10%
Other nontaxable or nondeductible items	1.00%	0.90%	0.20%
Excess tax benefits on share-based payments	(1.10%)	(1.00%)	(0.80%)
Tax credits - research credit	(0.40%)	(0.60%)	(0.90%)
Foreign Tax Expense
Tax expense (benefit) relating to foreign operations	(0.30%)	0.50%	0.80%
Changes in unrecognized tax benefits	(1.80%)	0.70%	(6.00%)
Total	21.30%	23.70%	16.90%
U.S.
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Domestic state and local income taxes, net of federal effect	$ 731	$ 607	$ 427
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Domestic state and local income taxes, net of federal effect	23.40%	22.50%	22.10%
Belgium
Foreign Tax Expense
Innovation deduction	$ (37)	$ (25)	$ (26)
Other	$ 15	$ 3	$ 10
Foreign Tax Expense
Innovation deduction	(1.20%)	(0.90%)	(1.30%)
Other	0.40%	0.10%	0.50%
United Kingdom
Foreign Tax Expense
Effective income tax rate reconciliation, foreign income tax rate differential, amount	$ 11	$ 34	$ 25
Foreign Tax Expense
Effective income tax rate reconciliation, foreign income tax rate differential, percent	0.40%	1.30%	1.20%
Other foreign jurisdictions
Foreign Tax Expense
Effective income tax rate reconciliation, foreign income tax rate differential, amount	$ 3	$ 1	$ 7
Foreign Tax Expense
Effective income tax rate reconciliation, foreign income tax rate differential, percent	0.10%	0.00%	0.40%