Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Millions		Jun. 30, 2018		Dec. 31, 2017
Loans Held-for-sale, Fair Value Disclosure		$ 2,005		$ 1,577
Loans Receivable, Fair Value Disclosure		$ 177		196
Other Assets, Fair Value Disclosure				$ 56
Common stock, par value		$ 1.00		$ 1.00
Loans and Leases Receivable, Gross	[1]	$ 144,935		$ 143,181
Long-term Debt	[2]	$ 11,995		$ 9,785
Common Stock, Shares, Outstanding	[3]	465,199		470,931
Variable Interest Entity, Primary Beneficiary [Member]
Loans and Leases Receivable, Gross		$ 165		$ 179
Long-term Debt		174		189
Treasury Stock and Other
Stockholders' Equity Attributable to Noncontrolling Interest		103		103
Consumer Portfolio Segment [Member]
Loans Receivable, Fair Value Disclosure		177		196
Loans and Leases Receivable, Gross		67,834		67,704
Residential Portfolio Segment [Member]
Loans and Leases Receivable, Gross		$ 38,216		$ 38,620
Restricted Stock [Member]
Common Stock, Shares, Outstanding		7		9
Trading Securities [Member]
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value		$ 1,160		$ 1,086
Available-for-sale Securities [Member]
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value		184		223
Fair Value, Measurements, Recurring [Member]
Loans Held-for-sale, Fair Value Disclosure		2,005		1,577
Loans Receivable, Fair Value Disclosure		177		196
Servicing Asset at Fair Value, Amount		1,959		1,710
Other Assets, Fair Value Disclosure		126	[4]	56	[5]
Long-term Debt, Fair Value		220		530
Brokered Time Deposits [Member] | Fair Value, Measurements, Recurring [Member]
Deposits, Fair Value Disclosure		$ 350		$ 236

[1] Includes loans of consolidated VIEs of $165 million and $179 million at June 30, 2018 and December 31, 2017, respectively.

[2] Includes debt of consolidated VIEs of $174 million and $189 million at June 30, 2018 and December 31, 2017, respectively.

[3] Includes restricted shares of 7 thousand and 9 thousand at June 30, 2018 and December 31, 2017, respectively.

[4] Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities available for sale to Other assets on the Consolidated Balance Sheets. Reclassifications have been made to previously reported amounts for comparability. See Note 9, "Other Assets," for additional information.

[5] Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities available for sale to Other assets on the Consolidated Balance Sheets. Reclassifications have been made to previously reported amounts for comparability. See Note 9, "Other Assets," for additional information.