Investments (Collectively Significant Equity Method Investments - Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Carrying value of investments accounted for under the equity method	$ 4,700
Total assets	231,986	$ 228,591
Total liabilities	223,888	222,443
Net income (loss)	289	256	$ (1,124)
Nonconsolidated Equity Method Investment
Schedule of Equity Method Investments [Line Items]
Unfunded commitments	1,100
Total assets	822,200	903,800
Total liabilities	76,200	78,500
Net income (loss)	$ 53,100	$ 60,100	$ 24,800