Financing Activities - Equity Securities (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2023	Jun. 01, 2023
Securities Financing Transaction [Line Items]
Annualized current quarterly common stock dividend (in dollars per share)		$ 96
Preferred Stock, Par or Stated Value Per Share				$ 50
Payments for Repurchase of Redeemable Noncontrolling Interest	$ 3
Preferred Stock, Shares Outstanding				49,089
Preferred Stock Redeemed, Prorated Dividend, Per Share	$ 0.1875
Preferred Stock Redemption, Premium, Per Share	$ 5
Treasury Stock, Common
Securities Financing Transaction [Line Items]
Treasury stock acquired			38,000