Investments - Summary of Derivative Instruments (Details) - Designated as Hedging Instrument - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Fair Value Hedging \| Foreign currency swap contracts
Derivative [Line Items]
Notional Value	$ 1,026	$ 1,083
Fair Value Hedging \| Interest rate swap contracts
Derivative [Line Items]
Notional Value	1,500	1,500
Net Investment Hedging \| Foreign currency swap contracts
Derivative [Line Items]
Notional Value	$ 415	$ 460

Nominal or face amount used to calculate payment on derivative.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant