Income Taxes - Tax Carryforwards and Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Operating Loss and Tax Credit Carryforwards [Line Items]
Net operating loss carryforwards	$ 233	$ 262
Tax credit carryforwards	3,057	$ 3,674
Federal [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Net operating loss carryforwards	1
Tax credit carryforwards	2,680
State [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Net operating loss carryforwards	214
Tax credit carryforwards	371
Net operating loss carryforwards with indefinite expiration period	78
Tax credit carryforward with indefinite expiration period	192
Foreign [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Net operating loss carryforwards	18
Tax credit carryforwards	6
Net operating loss carryforwards with indefinite expiration period	$ 1