Taxation (Components Of Net Deferred Tax Assets) (Details) - USD ($) $ in Millions		Dec. 31, 2024	Dec. 31, 2023
Deferred Tax Assets, Gross [Abstract]
Loss reserve discount		$ 1,746	$ 1,643
Unearned premiums reserve		753	678
Foreign tax credits		18	19
Loss carry-forwards		146	149
Investments	[1]	512	524
Depreciation		26	37
Future policy benefits		176	(42)
Other		268	189
Total deferred tax assets		3,645	3,197
Valuation allowance		1,081	716
Deferred Tax Assets, Net of Valuation Allowance		2,564	2,481
Deferred Tax Liabilities, Gross [Abstract]
Deferred policy acquisition costs		1,005	675
Other intangible assets, including VOBA		1,289	1,444
Un-remitted foreign earnings		251	176
Total deferred tax liabilities		2,545	2,295
Net deferred tax assets (liabilities)		$ 19	$ 186

[1] Included in Investments are deferred taxes on unrealized depreciation of $787 million and $662 million at December 31, 2024 and 2023, respectively.