LONG-TERM DEBT AND SHAREHOLDERS' EQUITY (Changes In Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 6,025	$ 5,283	$ 5,691	$ 4,893
Other comprehensive income before reclassifications, net of tax			139	(151)
Amounts reclassified from AOCI, net of tax			217	255
Other comprehensive income (loss), net of tax	213	(78)	356	104
Balance at end of period	6,385	5,315	6,385	5,315
Income tax expense included in OCI			117	34
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(2,549)	(2,930)	(2,692)	(3,112)
Balance at end of period	(2,336)	(3,008)	(2,336)	(3,008)
Net unrealized gains/(losses) on investment securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period			(2,526)	(2,800)
Other comprehensive income before reclassifications, net of tax			137	(170)
Amounts reclassified from AOCI, net of tax			147	159
Other comprehensive income (loss), net of tax			284	(11)
Balance at end of period	(2,242)	(2,811)	(2,242)	(2,811)
Income tax expense included in OCI			93	(4)
Net unrealized gains/(losses) on derivatives and other
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period			(165)	(311)
Other comprehensive income before reclassifications, net of tax			2	19
Amounts reclassified from AOCI, net of tax			70	96
Other comprehensive income (loss), net of tax			72	115
Balance at end of period	(93)	(196)	(93)	(196)
Income tax expense included in OCI			24	38
Pension and post-retirement
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period			(1)	(1)
Other comprehensive income before reclassifications, net of tax			0	0
Amounts reclassified from AOCI, net of tax			0	0
Other comprehensive income (loss), net of tax			0	0
Balance at end of period	$ (1)	$ (1)	(1)	(1)
Income tax expense included in OCI			$ 0	$ 0