Benefit Plans - 2015 Long-Term Stock Incentive Plan (Narrative) (Details) - 2015 Long-Term Stock Incentive Plan shares in Millions	3 Months Ended
	Mar. 31, 2024 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock conversion to common stock	1
Common stock available for future grants (in shares)	89
Employees and Non Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option expiration period	10 years
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years