Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Intangible assets, less accumulated amortization	$ 293		$ 307
Amortization of Intangible Assets	12	$ 7
Finite-Lived Intangible Assets, Net	279		292
PWIC
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	14		14
Insurance Intangible Asset [Member]
Intangible Assets, Gross (Excluding Goodwill)	1,256		1,258
Finite-Lived Intangible Assets, Accumulated Amortization	1,023		1,013
Intangible assets, less accumulated amortization	233		245
Other Intangible Assets
Intangible Assets, Gross (Excluding Goodwill)	57		57
Finite-Lived Intangible Assets, Accumulated Amortization	11		10
Intangible assets, less accumulated amortization	$ 46		$ 47