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Fair Value Measurements (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
6.7% Senior Notes
Financial Instruments
Interest rate	6.70%
Book Value | Retail
Financial Instruments
Long-term debt	$ 1,500	$ 1,500
Book Value | Institutional
Financial Instruments
Long-term debt	536	535
Book Value | Other
Financial Instruments
Long-term debt	1,136	746
Fair Value | Level 2 | Retail
Financial Instruments
Long-term debt	1,155	1,594
Fair Value | Level 2 | Institutional
Financial Instruments
Long-term debt	399	659
Fair Value | Level 2 | Other
Financial Instruments
Long-term debt	$ 1,136	$ 746
Interest rate | Institutional and Other | Minimum
Financial Instruments
Fair value assumption, interest rate	3.70%	1.31%
Interest rate | Institutional and Other | Maximum
Financial Instruments
Fair value assumption, interest rate	8.06%	4.40%

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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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