Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 2	$ 2
Unrecognized Tax Benefits, Period Increase (Decrease)	$ 0	$ 0	$ (1)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		$ 107	$ 122
Effective Income Tax Rate Reconciliation, Percent	251.00%	(157.00%)	13.00%
Payments for Legal Settlements	$ 0	$ (3)	$ (377)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	107	122
Additions for current year tax positions	1	4	28
Additions for tax positions of prior years	0	0	14
Reductions for tax positions of prior years	(1)	(16)	0
Lapse of statute of limitations	0	0	(1)
Ending balance	107	107	122
Unrecognized Tax Benefits, Income Tax Penalties Accrued	0	0
Unrecognized Tax Benefits, Income Tax Penalties Expense	$ 0	$ 0	$ 1
UNITED STATES
Income Tax Contingency [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 34
Effective Income Tax Rate Reconciliation, Percent	35.00%