Financing Activities - Equity Securities (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2022	Aug. 01, 2021
Securities Financing Transaction [Line Items]
Stock Repurchase Program, Authorized Amount					$ 3,000
Preferred Stock, Value, Outstanding		$ 3		$ 3
Annualized current quarterly common stock dividend (in dollars per share)	$ 90
Preferred Stock, Dividend Preference or Restrictions				Pursuant to the preferred stock arrangement, as long as any preferred stock is outstanding, certain restrictions on payment of common stock dividends would come into effect if the common stock equity of RIE was, or by reason of payment of such dividends became, less than 25% of total capitalization of RIE.
Treasury Stock, Common
Securities Financing Transaction [Line Items]
Treasury stock acquired		154
Treasury Stock, Value, Acquired		$ 0	$ 1,000	$ 0