Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Partners' Capital [Abstract]
Net Income (Loss)	$ 2,741	$ 1,992	$ 1,859
Other comprehensive income (loss), net of tax and reclassification adjustments:
Net unrealized gains (losses) on investment securities	142	(407)	(67)
Cash flow hedges adjustments	98	(315)	(211)
Defined benefit plans liability adjustments	87	65	214
Foreign currency translation adjustments	4	(6)	(1)
Total other comprehensive income (loss)	331	(663)	(65)
Total comprehensive income	$ 3,072	$ 1,329	$ 1,794