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Debt (Senior Note Offering) (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Jun. 30, 2006
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 850,000,000
Proceeds from Debt, Net of Issuance Costs	$ 690,000,000
Debt Related Commitment Fees and Debt Issuance Costs	$ 10,000,000
Senior Notes Due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.90%
Debt Instrument, Face Amount	$ 600,000,000
Subordinated Debentures Due 2052
Debt Instrument [Line Items]
Debt Instrument, Offering Date	Sep. 23, 2022
Debt Instrument, Interest Rate, Stated Percentage	7.125%
Debt Instrument, Face Amount	$ 700,000,000

X

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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