Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Provision (benefit) for income taxes	$ 4,553	$ 2,467
Net discrete tax (expense) benefit	(559)	558
Cash paid for income taxes, net of refunds	877	$ 458	$ 12,727	$ 11,018
Tax contingencies	$ 6,300		$ 6,300		$ 6,500