XML 184 R123.htm IDEA: XBRL DOCUMENT v3.25.0.1
Debt - Short-term and Long-term Debt by Issuance (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Schedule of Debt [Line Items]    
Revolving Credit Facilities $ 0 $ 0
Total Notes and Debentures 4,482 4,482
Unamortized discount and debt issuance cost [2] 116 120
Total Debt 4,366 4,362
Less: Current maturities 0 0
Long-Term Debt $ 4,366 4,362
Interest rate derivatives    
Schedule of Debt [Line Items]    
Derivative, Maturity Date Feb. 15, 2027  
2.8% Notes, due 2029    
Schedule of Debt [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 2.80%  
Senior Notes and Debentures $ 600 600
5.95% Notes, due 2036    
Schedule of Debt [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 5.95%  
Senior Notes and Debentures $ 300 300
6.625% Notes, due 2040    
Schedule of Debt [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 6.625%  
Senior Notes and Debentures $ 295 295
6.1% Notes, due 2041    
Schedule of Debt [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 6.10%  
Senior Notes and Debentures $ 409 409
Debt Instrument, Unamortized Discount $ 68 70
Debt Instrument, Interest Rate, Effective Percentage 7.90%  
6.625% Notes, due 2042    
Schedule of Debt [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 6.625%  
Senior Notes and Debentures $ 178 178
4.3% Notes, due 2043    
Schedule of Debt [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 4.30%  
Senior Notes and Debentures $ 300 300
4.4% Notes, due 2048    
Schedule of Debt [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 4.40%  
Senior Notes and Debentures $ 500 500
3.6% Notes, due 2049    
Schedule of Debt [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 3.60%  
Senior Notes and Debentures $ 800 800
2.9% Notes, due 2051    
Schedule of Debt [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 2.90%  
Senior Notes and Debentures $ 600 600
SOFR Plus Two Point One Two Five Percent Plus Zero Point Two Six One Six One Percent Junior Subordinated Notes Due Two Thousand Sixty Seven    
Schedule of Debt [Line Items]    
Junior Subordinated Debentures $ 500 $ 500
SOFR Plus Two Point One Two Five Percent Plus Zero Point Two Six One Six One Percent Junior Subordinated Notes Due Two Thousand Sixty Seven | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate    
Schedule of Debt [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 300.00%  
SOFR Plus Two Point One Two Five Percent Plus Zero Point Two Six One Six One Percent Junior Subordinated Notes Due Two Thousand Sixty Seven | hig_Tenor Spread Adjustment    
Schedule of Debt [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 0.26161%  
SOFR Plus Two Point One Two Five Percent Plus Zero Point Two Six One Six One Percent Junior Subordinated Notes Due Two Thousand Sixty Seven | Credit Spread Adjustment    
Schedule of Debt [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 2.125%