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Short And Long-Term Debt Senior Secured Credit Facility (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2023
USD ($)
Debt Instrument [Line Items]  
Letter of Credit, borrowing capacity $ 150
Maximum | Required Covenant Ratio  
Debt Instrument [Line Items]  
Senior secured leverage ratio 4.75
Ratio of Indebtedness to Net Capital Denominator 1.00
SOFR  
Debt Instrument [Line Items]  
Description of variable interest rate basis SOFR
ABR  
Debt Instrument [Line Items]  
Description of variable interest rate basis ABR
Line of Credit | Revolving Credit Facility  
Debt Instrument [Line Items]  
Line of credit facility borrowing capacity $ 1,100
Line of Credit | Revolving Credit Facility | SOFR | Greater than 3.50 to 1.00  
Debt Instrument [Line Items]  
Debt Instrument, basis spread on variable rate 2.50%
Line of Credit | Revolving Credit Facility | SOFR | Less than or equal to 3.50 to 1.00 but greater than or equal to 2.50 to 1.00  
Debt Instrument [Line Items]  
Debt Instrument, basis spread on variable rate 2.25%
Line of Credit | Revolving Credit Facility | SOFR | Less than 2.50 to 1.00 but greater than or equal to 2.00 to 1.00  
Debt Instrument [Line Items]  
Debt Instrument, basis spread on variable rate 2.00%
Line of Credit | Revolving Credit Facility | SOFR | Less than 2.00 to 1.00  
Debt Instrument [Line Items]  
Debt Instrument, basis spread on variable rate 1.75%
Line of Credit | Revolving Credit Facility | ABR | Greater than 3.50 to 1.00  
Debt Instrument [Line Items]  
Debt Instrument, basis spread on variable rate 1.50%
Line of Credit | Revolving Credit Facility | ABR | Less than or equal to 3.50 to 1.00 but greater than or equal to 2.50 to 1.00  
Debt Instrument [Line Items]  
Debt Instrument, basis spread on variable rate 1.25%
Line of Credit | Revolving Credit Facility | ABR | Less than 2.50 to 1.00 but greater than or equal to 2.00 to 1.00  
Debt Instrument [Line Items]  
Debt Instrument, basis spread on variable rate 1.00%
Line of Credit | Revolving Credit Facility | ABR | Less than 2.00 to 1.00  
Debt Instrument [Line Items]  
Debt Instrument, basis spread on variable rate 0.75%
Convertible Debt | 0.25% Exchangeable Senior Notes  
Debt Instrument [Line Items]  
Interest Rate 0.25%