CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Operating Activities
Net income		$ 2,193	$ 2,180	[1]	$ 1,543	[1]
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for (benefit from) loan and lease losses		237	261	[1]	343	[1]
Depreciation, amortization and accretion		360	341	[1]	453	[1]
Stock-based compensation expense		127	118	[1]	111	[1]
(Benefit from) provision for deferred income taxes		30	(252)	[1]	(141)	[1]
Securities losses (gains), net		54	(3)	[1]	(7)	[1]
Securities losses (gains), net - non-qualifying hedges on mortgage servicing rights		15	(2)	[1]	0	[1]
MSR fair value adjustment		83	122	[1]	0	[1]
(Recovery of) provision for MSR impairment		0	0	[1]	(7)	[1]
Net gains on sales of loans and fair value adjustments on loans held for sale		(71)	(108)	[1]	(101)	[1]
Net losses on disposition and impairment of bank premises and equipment		(43)	0	[1]	(13)	[1]
Gain on sale of certain retail branch operations		0	0	[1]	(19)	[1]
Net (gains) losses on disposition and impairment of operating lease equipment		6	(39)	[1]	(9)	[1]
Gain related to Vantiv Inc.'s acquisition of Worldpay Group plc.		(414)	0		0
Gain on sale of Worldpay, Inc. shares		(205)	(1,037)		0
Gain on the TRA associated with Worldpay, Inc.		(20)	(44)	[1]	(197)	[1]
Proceeds from sales of loans held for sale		5,199	6,453	[1]	6,895	[1]
Loans originated or purchased for sale, net of repayments		(5,378)	(6,054)	[1]	(7,014)	[1]
Dividends representing return on equity method investments		12	46	[1]	28	[1]
Net change in:
Trading and equity securities		132	(442)	[1]	(23)	[1]
Other assets		303	(22)	[1]	338	[1]
Accrued taxes, interest and expenses		147	(138)	[1]	(157)	[1]
Other liabilities		15	22	[1]	24	[1]
Net Cash Provided by (Used in) Operating Activities		2,856	1,480	[1]	2,091	[1]
Proceeds from sales:
Available-for-sale debt and other securities		12,430	12,637	[1]	18,280	[1]
Loans and leases		305	164	[1]	360	[1]
Bank premises and equipment		57	40	[1]	82	[1]
Proceeds from repayments / maturities:
Available-for-sale debt and other securities		1,845	2,331	[1]	3,776	[1]
Held-to-maturity securities		6	3	[1]	44	[1]
Purchases:
Available-for-sale debt and other securities		(16,207)	(15,295)	[1]	(24,636)	[1]
Bank premises and equipment		(192)	(200)	[1]	(186)	[1]
MSRs		(82)	(109)	[1]	0	[1]
Proceeds from sale and dividends representing return of equity method investments		604	1,363	[1]	64	[1]
Proceeds from settlement of BOLI		16	14	[1]	23	[1]
Net cash paid on sale of certain retail branch operations		0	0	[1]	(219)	[1]
Net cash paid on acquisitions		(43)	(44)	[1]	0	[1]
Net change in:
Other short-term investments		928	1	[1]	(83)	[1]
Loans and leases		(3,866)	(446)	[1]	(243)	[1]
Operating lease equipment		58	(31)	[1]	(126)	[1]
Net Cash (Used in) Provided by Investing Activities		(4,141)	428	[1]	(2,864)	[1]
Net change in:
Deposits		5,673	(659)	[1]	1,146	[1]
Federal funds purchased		1,751	42	[1]	(19)	[1]
Other short-term borrowings		(3,439)	477	[1]	2,028	[1]
Dividends paid on common stock		(467)	(430)	[1]	(402)	[1]
Dividends paid on preferred stock		(98)	(75)	[1]	(52)	[1]
Proceeds from issuance of long-term debt		2,438	2,490	[1]	3,735	[1]
Repayment of long-term debt		(2,884)	(1,969)	[1]	(5,119)	[1]
Repurchase of treasury stock and related forward contract		1,453	1,605	[1]	661	[1]
Other		(69)	(57)	[1]	(31)	[1]
Net Cash Provided (Used in) by Financing Activities		1,452	(1,786)	[1]	625	[1]
Increase (Decrease) in Cash and Due from Banks		167	122	[1]	(148)	[1]
Cash and Due from Banks at Beginning of Period	[1]	2,514	2,392		2,540
Cash and Due from Banks at End of Period		$ 2,681	$ 2,514	[1]	$ 2,392	[1]

[1] Effective in the fourth quarter of 2018, Fifth Third retrospectively applied a change in its accounting policy for investments in affordable housing projects that qualify for LIHTC in accordance with ASU 2014-01. Refer to Note 1 for additional information.