Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Millions		Mar. 31, 2019	Dec. 31, 2018
Loans Held-for-sale, Fair Value Disclosure		$ 1,100	$ 1,200
Loans Receivable, Fair Value Disclosure		$ 134	$ 163
Common stock, par value		$ 1.00	$ 1.00
Loans and Leases Receivable, Gross	[1]	$ 155,233	$ 151,839
Long-term Debt	[2]	$ 17,395	$ 15,072
Common Stock, Shares, Outstanding	[3]	443,713	446,888
Variable Interest Entity, Primary Beneficiary [Member]
Loans and Leases Receivable, Gross		$ 147	$ 153
Long-term Debt		156	161
Treasury Stock and Other
Stockholders' Equity Attributable to Noncontrolling Interest		101	103
Consumer Portfolio Segment [Member]
Loans Receivable, Fair Value Disclosure		134	163
Loans and Leases Receivable, Gross		71,504	70,899
Residential Portfolio Segment [Member]
Loans and Leases Receivable, Gross		$ 38,300	$ 38,900
Restricted Stock [Member]
Common Stock, Shares, Outstanding		7	7
Available-for-sale Securities [Member]
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value		$ 210	$ 222
Fair Value, Measurements, Recurring [Member]
Loans Held-for-sale, Fair Value Disclosure		1,059	1,178
Loans Receivable, Fair Value Disclosure		134	163
Servicing Asset at Fair Value, Amount		1,883	1,983
Other Assets, Fair Value Disclosure		85	95
Long-term Debt, Fair Value		296	289
Brokered Time Deposits [Member] | Fair Value, Measurements, Recurring [Member]
Deposits, Fair Value Disclosure		473	403
Mortgage Servicing Rights, Fair Value [Member]
Servicing Asset at Fair Value, Amount		$ 1,883	$ 1,983

[1] Includes loans of consolidated VIEs of $147 million and $153 million at March 31, 2019 and December 31, 2018, respectively.

[2] Includes debt of consolidated VIEs of $156 million and $161 million at March 31, 2019 and December 31, 2018, respectively.

[3] Includes restricted shares of 7 thousand and 7 thousand at March 31, 2019 and December 31, 2018, respectively.