Regulatory Capital (Tables)

12 Months Ended

Dec. 31, 2017

Brokers and Dealers [Abstract]

Summary Of Actual Capital Amounts And Ratios

The actual capital amounts and ratios of FHN and FTBNA are presented in the table below.

(Dollars in thousands)	First Horizon National Corporation				First Tennessee Bank National Association
	Amount		Ratio		Amount		Ratio
On December 31, 2017
Actual:
Total Capital	$	3,703,754	11.10	%	$	3,520,670	10.74	%
Tier 1 Capital	3,281,478		9.83		3,317,684		10.12
Common Equity Tier 1	2,962,155		8.88		3,041,420		9.28
Leverage	3,281,478		10.31		3,317,684		10.70
Minimum Requirement for Capital Adequacy Purposes:
Total Capital	2,669,910		8.00		2,622,924		8.00
Tier 1 Capital	2,002,433		6.00		1,967,193		6.00
Common Equity Tier 1	1,501,824		4.50		1,475,395		4.50
Leverage	1,272,990		4.00		1,240,647		4.00
Minimum Requirement to be Well Capitalized Under Prompt Corrective Action Provisions:
Total Capital					3,278,655		10.00
Tier 1 Capital					2,622,924		8.00
Common Equity Tier 1					2,131,126		6.50
Leverage					1,550,809		5.00
On December 31, 2016
Actual:
Total Capital	$	2,926,010	12.24	%	$	2,762,271	11.78	%
Tier 1 Capital	2,671,871		11.17		2,538,382		10.83
Common Equity Tier 1	2,377,987		9.94		2,298,080		9.80
Leverage	2,671,871		9.35		2,538,382		9.16
Minimum Requirement for Capital Adequacy Purposes:
Total Capital	1,913,133		8.00		1,875,780		8.00
Tier 1 Capital	1,434,849		6.00		1,406,835		6.00
Common Equity Tier 1	1,076,137		4.50		1,055,126		4.50
Leverage	1,143,250		4.00		1,108,406		4.00
Minimum Requirement to be Well Capitalized Under Prompt Corrective Action Provisions:
Total Capital					2,344,725		10.00
Tier 1 Capital					1,875,780		8.00
Common Equity Tier 1					1,524,071		6.50
Leverage					1,385,508		5.00