Income Taxes Income Taxes - Operating Loss and Tax Credit Carryforwards (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 285	$ 333
Tax Credit Carryforwards	78	131
Total Operating Loss and Tax Credit Carryforwards	363	464
Expiring within Five Years [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	127	123
Tax Credit Carryforwards	15	14
Expiring After Five Years Or Having Indefinite Expiration [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	158	210
Tax Credit Carryforwards	$ 63	$ 117