Income Taxes (Deferred Income Taxes Included in Other Assets in the Consolidated Balance Sheets) (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Deferred Income Tax Assets And Liabilities
Allowance for loan and lease losses	$ 252	$ 232
Deferred compensation	103	79
Other comprehensive income	0	42
Reserve for unfunded commitments	30	28
Reserves	32	28
State net operating loss carryforwards	9	7
Other	154	112
Total deferred tax assets	580	528
Lease financing	650	599
Investments in joint ventures and partnership interests	25	131
MSRs and related economic hedges	144	107
State deferred taxes	47	73
Bank premises and equipment	73	60
Other comprehensive income	352	0
Other	127	102
Total deferred tax liabilities	1,418	1,072
Total net deferred tax liabilities	$ (838)	$ (544)