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BORROWINGS - Junior Subordinated Debt Trusts (Detail) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2019 | Dec. 31, 2018
Subordinated Borrowing [Line Items] |  |
Junior subordinated debt | $ 66 | $ 111
Trust Preferred Securities [Member] |  |
Subordinated Borrowing [Line Items] |  |
Junior subordinated debt | 72 |
Common Securities [Member] |  |
Subordinated Borrowing [Line Items] |  |
Junior subordinated debt | 3 |
F.N.B. Statutory Trust II [Member] |  |
Subordinated Borrowing [Line Items] |  |
Junior subordinated debt | $ 22 |
Interest Rate | 4.06% |
F.N.B. Statutory Trust II [Member] | LIBOR [Member] |  |
Subordinated Borrowing [Line Items] |  |
Basis spread on variable rate | 1.65% |
F.N.B. Statutory Trust II [Member] | Trust Preferred Securities [Member] |  |
Subordinated Borrowing [Line Items] |  |
Junior subordinated debt | $ 22 |
F.N.B. Statutory Trust II [Member] | Common Securities [Member] |  |
Subordinated Borrowing [Line Items] |  |
Junior subordinated debt | 1 |
Yadkin Valley Statutory Trust I [Member] |  |
Subordinated Borrowing [Line Items] |  |
Junior subordinated debt | $ 22 |
Interest Rate | 3.73% |
Yadkin Valley Statutory Trust I [Member] | LIBOR [Member] |  |
Subordinated Borrowing [Line Items] |  |
Basis spread on variable rate | 1.32% |
Yadkin Valley Statutory Trust I [Member] | Trust Preferred Securities [Member] |  |
Subordinated Borrowing [Line Items] |  |
Junior subordinated debt | $ 25 |
Yadkin Valley Statutory Trust I [Member] | Common Securities [Member] |  |
Subordinated Borrowing [Line Items] |  |
Junior subordinated debt | 1 |
FNB Financial Services Capital Trust I [Member] |  |
Subordinated Borrowing [Line Items] |  |
Junior subordinated debt | $ 22 |
Interest Rate | 3.78% |
FNB Financial Services Capital Trust I [Member] | LIBOR [Member] |  |
Subordinated Borrowing [Line Items] |  |
Basis spread on variable rate | 1.46% |
FNB Financial Services Capital Trust I [Member] | Trust Preferred Securities [Member] |  |
Subordinated Borrowing [Line Items] |  |
Junior subordinated debt | $ 25 |
FNB Financial Services Capital Trust I [Member] | Common Securities [Member] |  |
Subordinated Borrowing [Line Items] |  |
Junior subordinated debt | $ 1 |

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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Including the current and noncurrent portions, the carrying value of junior subordinated long-term debt owed to unconsolidated subsidiary trusts as of the balance sheet date. Such debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets and was initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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