Common and Preferred Shares (Details Textual) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Mar. 08, 2023
Class of Stock [Line Items]
Common share repurchases authorized (up to) (in shares)				120.0
Common shares repurchased (in shares)	24.0	22.0	20.0
Cost basis of common stock repurchased	$ 6,020	$ 3,650	$ 3,502
Common shares remaining under share repurchase authorizations (in shares)	75.0
Shares held as treasury shares (in shares)	2.2	2.3	2.4
Cost basis of treasury stock	$ 243	$ 252	$ 262
Preferred shares, authorized, up to (in shares)	20.0	20.0
Preferred shares, par value (in dollars per share)	$ 1.667	$ 1.667
Redemption price per preferred share (in dollars per share)	1,000,000
Depositary shares redemption amount (in dollars per share)	1,000
Series D Preferred Stock
Class of Stock [Line Items]
Preferred shares, par value (in dollars per share)	$ 1.667
Repurchase Agreements
Class of Stock [Line Items]
Cost basis of common stock repurchased	$ 5,900	$ 3,500	3,300
Commissions and excise tax paid included in cost basis of common stock repurchased	$ 55	$ 32
Commissions paid included in cost basis of common stock repurchased			$ 4