Income Tax (Tax Credit Carryforwards) (Details) $ in Millions	Dec. 31, 2021 USD ($)
Foreign Tax Authority
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 134
Foreign Tax Authority | 2022-2025
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	18
Foreign Tax Authority | 2026-2030
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	96
Foreign Tax Authority | 2031-2035
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	20
Foreign Tax Authority | 2036-2040
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	17
General business tax credit carryforward | 2022-2025
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	0
General business tax credit carryforward | 2026-2030
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	0
General business tax credit carryforward | 2031-2035
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	0
General business tax credit carryforward | 2036-2040
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	17
General business tax credit carryforward | Indefinite
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 0