Taxation (Components Of Net Deferred Tax Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred Tax Assets, Gross [Abstract]
Loss reserve discount	$ 1,001	$ 950
Unearned premiums reserve	417	544
Foreign tax credits	76	156
Loss carry-forwards	104	139
Investments	57	0
Unrealized depreciation on investments	1,387	0
Depreciation	126	190
Other	175	296
Total deferred tax assets	3,343	2,275
Valuation allowance	916	92
Deferred Tax Assets, Net, Total	2,427	2,183
Deferred Tax Liabilities, Gross [Abstract]
Deferred policy acquisition costs	276	679
Other intangible assets, including VOBA	2,194	1,268
Un-remitted foreign earnings	249	121
Investments	0	144
Unrealized appreciation on investments	0	360
Total deferred tax liabilities	2,719	2,572
Net deferred tax liabilities	$ (292)	$ (389)