Notes Payable and Long Term Borrowings - Corporate Borrowings and Subsidiary Borrowings (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Debt Disclosure [Abstract]
Total	$ 2,476	$ 1,493
Unamortized Discount and Issuance Costs	(24)	(7)
Less Than 1 year	0	0
1-2 Years	0	0
2-3 Years	1,900	0
3-4 Years	0	1,000
4-5 Years	0	0
More Than 5 Years	$ 600	$ 500