Parent Company Financial Statements (Condensed Balance Sheet - Parent Company Only) (Detail) - USD ($) $ in Millions		Dec. 31, 2018		Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2016	Dec. 31, 2015
Investments in subsidiaries:
Goodwill		$ 2,478			$ 2,445	$ 2,416
Other assets	[2]	7,372	[1]		6,863
Total Assets		146,069			142,081	142,080
Liabilities
Other short-term borrowings		573			4,012
Accrued expenses and other liabilities	[2]	2,498			2,144
Long-term debt (external)	[2]	14,426			14,904
Total liabilities		129,819			125,861
Shareholders' Equity
Common stock	[3]	2,051			2,051
Preferred stock	[4]	1,331			1,331
Capital surplus		2,873			2,790
Retained earnings	[1]	16,578			14,957
Accumulated other comprehensive (loss) income		(112)			73	59		$ 197
Treasury stock	[3]	(6,471)			(5,002)
Noncontrolling interests		0			20
Total Equity		16,250			16,200
Total Equity		16,250		$ 16,224	16,220	$ 16,081	$ 15,736	$ 15,870
Total Liabilities and Equity		146,069			142,081
Parent Company Only
Assets
Cash		120			80
Short-term Investments		3,642			3,493
Loans to subsidiaries:
Nonbank subsidiaries		571			843
Total loans to subsidiaries		571			843
Investments in subsidiaries:
Nonbank subsidiaries		17,921			17,530
Total investment in subsidiaries		17,921			17,530
Goodwill		80			80
Other assets		268			329
Total Assets		22,602			22,355
Liabilities
Other short-term borrowings		253			315
Accrued expenses and other liabilities		424			472
Long-term debt (external)		5,675			5,348
Total liabilities		6,352			6,135
Shareholders' Equity
Common stock		2,051			2,051
Preferred stock		1,331			1,331
Capital surplus		2,873			2,790
Retained earnings		16,578			14,957
Accumulated other comprehensive (loss) income		(112)			73
Treasury stock		(6,471)			(5,002)
Noncontrolling interests		0			20
Total Equity		16,250			16,220
Total Liabilities and Equity		$ 22,602			$ 22,355

[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.

[2] Includes $ 40 and $ 62 of other short-term investments, $ 668 and $ 1,297 of portfolio loans and leases, $ (4) and $ (6) of ALLL, $ 5 and $ 7 of other assets, $ 1 and $ 2 of other liabilities and $ 606 and $ 1,190 of long-term debt from consolidated VIEs that are included in their respec tive captions above at December 31, 2018 and 2017 , respectively. For further information, refer to Note 10 .

[3] Common shares: Stated value $ 2.22 per share; authorized 2,000,000,000 ; outstanding at December 31, 2018 – 646,630,857 (excludes 277,261,724 treasury shares) , 2017 – 693,804,893 (excludes 230,087,688 treasury shares).

[4] 446,000 shares of undesignated no par value preferred stock are authorized and unissued at December 31, 2018 and 2017 ; fixed-to-floating rate non-cumulative Series H perpetual preferred stock with a $ 25,000 liquidation preference: 24,000 authorized shares, issued and outstanding at December 31, 2018 and 2017 ; fixed-to-floating rate non-cumulative Series I perpetual preferred stock with a $ 25,000 liquidation preference: 18,000 authorized shares, issued and outstandi ng at December 31, 2018 and 2017 ; and fixed-to-floating rate non-cumulative Series J perpetual preferred stock with a $ 25,000 liquidation preference: 12,000 authorized shares, issue d and outstanding at December 31, 2018 and 2017 .