VIE - Assets and Liabilities Related to Non-consolidated VIEs and Maximum Exposure to Losses (Details) - Variable Interest Entity, Not Primary Beneficiary - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Private Equity Investments
Variable Interest Entity [Line Items]
Total Assets	$ 87	$ 41
Total Liabilities	0	0
Maximum Exposure	166	73
Loans Provided to VIEs
Variable Interest Entity [Line Items]
Total Assets	2,417	2,331
Total Liabilities	0	0
Maximum Exposure	3,747	3,617
Lease pool entities
Variable Interest Entity [Line Items]
Total Assets	67
Total Liabilities	0
Maximum Exposure	67
Fifth Third Community Development Corporation Investments
Variable Interest Entity [Line Items]
Total Assets	1,304	1,198
Total Liabilities	440	376
Maximum Exposure	$ 1,304	$ 1,198