Investments - Available-for-Sale Securities by Tenor (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Amortized Cost
Amortized Cost	$ 156,636	$ 99,116
Fair Value
Fair Value	$ 155,636	$ 99,244
Weighted Average Yield	3.87%	3.81%
U.S. government obligations
Amortized Cost
Less than 1 year	$ 2,482	$ 3,723
1 year to 5 years	71,398	70,516
5 years to 10 years	64,837	15,970
Greater than 10 years	2,714
Amortized Cost	141,431	90,209
Fair Value
Less than 1 year	2,418	3,730
1 year to 5 years	71,080	70,872
5 years to 10 years	64,543	15,980
Greater than 10 years	2,668
Fair Value	140,709	90,582
U.S. agency obligations
Amortized Cost
1 year to 5 years	76
5 years to 10 years	436	104
Greater than 10 years	3,202	1,361
Amortized Cost	3,714	1,465
Fair Value
1 year to 5 years	75
5 years to 10 years	435	104
Greater than 10 years	3,177	1,363
Fair Value	3,687	1,467
Non-U.S. government obligations
Amortized Cost
Less than 1 year	3,926
1 year to 5 years	6,712	6,579
5 years to 10 years	853	863
Amortized Cost	11,491	7,442
Fair Value
Less than 1 year	3,917
1 year to 5 years	6,501	6,356
5 years to 10 years	822	839
Fair Value	$ 11,240	$ 7,195

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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