Income Tax (Tax Credit Carryforwards) (Details) $ in Millions	Dec. 31, 2023 USD ($)
Foreign Tax Authority
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 164
Foreign Tax Authority | 2024-2028
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	44
Foreign Tax Authority | 2029-2033
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	120
Foreign Tax Authority | 2034-2038
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	0
Foreign Tax Authority | 2039-2043
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	0
Foreign Tax Authority | Indefinite
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	0
General business tax credit carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	25
General business tax credit carryforward | 2024-2028
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	0
General business tax credit carryforward | 2029-2033
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	0
General business tax credit carryforward | 2034-2038
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	20
General business tax credit carryforward | 2039-2043
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	5
General business tax credit carryforward | Indefinite
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 0