Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Millions		Sep. 30, 2017	Dec. 31, 2016
Loans Held-for-sale, Fair Value Disclosure		$ 2,252	$ 3,540
Loans Receivable, Fair Value Disclosure		$ 206	$ 222
Common stock, par value		$ 1.00	$ 1.00
Loans and Leases Receivable, Gross	[1]	$ 144,264	$ 143,298
Long-term Debt	[2]	$ 11,280	$ 11,748
Common Stock, Shares, Outstanding	[3]	476,001	491,188
Variable Interest Entity, Primary Beneficiary [Member]
Loans and Leases Receivable, Gross		$ 186	$ 211
Long-term Debt		195	222
Treasury Stock and Other
Stockholders' Equity Attributable to Noncontrolling Interest		101	103
Residential Portfolio Segment [Member]
Loans Receivable, Fair Value Disclosure		206	222
Loans and Leases Receivable, Gross		$ 38,730	$ 38,990
Restricted Stock [Member]
Common Stock, Shares, Outstanding		9	11
Trading Securities [Member]
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value		$ 1,043	$ 1,437
Available-for-sale Securities [Member]
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value		280	0
Fair Value, Measurements, Recurring [Member]
Loans Held-for-sale, Fair Value Disclosure		2,252	3,540
Loans Receivable, Fair Value Disclosure		206	222
Servicing Asset at Fair Value, Amount		1,628	1,572
Long-term Debt, Fair Value		758	963
Brokered Time Deposits [Member] | Fair Value, Measurements, Recurring [Member]
Deposits, Fair Value Disclosure		$ 207	$ 78

[1] Includes loans of consolidated VIEs of $186 million and $211 million at September 30, 2017 and December 31, 2016, respectively.

[2] Includes debt of consolidated VIEs of $195 million and $222 million at September 30, 2017 and December 31, 2016, respectively.

[3] Includes restricted shares of 9 thousand and 11 thousand at September 30, 2017 and December 31, 2016, respectively.