Lease Obligations - Lessee (Lease Assets and Lease Liabilities) (Detail) - USD ($) $ in Millions		Mar. 31, 2019	Jan. 01, 2019
Lease Balance Sheet
Operating lease right-of-use assets			$ 509
Total right-of-use assets	[1]	$ 492
Operating lease liabilities		545
Finance lease liabilities		17
Total lease liabilities		562
Finance lease right of use asset accumulated amortization		18
Operating lease right of use asset accumulated amortization		22
Other assets
Lease Balance Sheet
Operating lease right-of-use assets		475
Bank premises and equipment
Lease Balance Sheet
Finance lease right-of-us assets		17
Accrued taxes, interest and expenses
Lease Balance Sheet
Operating lease liabilities		545
Long-term debt
Lease Balance Sheet
Finance lease liabilities		$ 17

[1] (a) F inance and operating lease right-of-use assets are recorded net of accumulated amortization of $ 18 and $ 22 as of March 31, 2019 , respectively .