Condensed Consolidating Statement of Condition (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Assets:
Cash and due from banks	$ 445,551,000	$ 388,311,000
Money market investments	5,941,716,000	3,262,286,000
Trading account debt securities, at fair value	42,545,000	40,321,000
Debt Securities Available for Sale, at Fair Value	15,813,301,000	17,648,473,000
Debt securities held-to-maturity	95,263,000	97,662,000
Less - Allowance for credit losses	13,390,000	0
Debt securities held-to-maturity, net	81,873,000	97,662,000
Equity securities	163,058,000	159,887,000
Investment in subsidiaries	0	0
Loans held-for-sale, at lower of cost or fair value	87,855,000	59,203,000
Loans held-in-portfolio:
Loans held-in-portfolio	27,847,840,000	27,587,856,000
Less - Unearned income	185,568,000	180,983,000
Allowance for credit losses	919,716,000	477,708,000	$ 550,628,000	$ 569,348,000
Total loans held-in-portfolio, net	26,742,556,000	26,929,165,000
Premises and equipment, net	552,007,000	556,650,000
Other real estate	123,922,000	122,072,000
Accrued income receivable	176,078,000	180,871,000
Mortgage servicing assets, at fair value	147,311,000	150,906,000	167,813,000	169,777,000
Other assets	1,788,437,000	1,819,615,000
Goodwill	671,122,000	671,122,000
Other intangible assets	26,307,000	28,780,000
Total assets	52,803,639,000	52,115,324,000	48,680,607,000
Deposits:
Non-interest bearing	9,396,449,000	9,160,173,000
Interest bearing	35,400,727,000	34,598,433,000
Total deposits	44,797,176,000	43,758,606,000
Assets sold under agreements to repurchase	178,766,000	193,378,000
Other short-term borrowings	100,000,000	0
Notes payable	1,058,131,000	1,101,608,000
Other liabilities	999,961,000	1,044,953,000
Total liabilities	47,134,034,000	46,098,545,000
Stockholders' equity:
Preferred stock	22,143,000	50,160,000
Common stock	1,044,000	1,044,000
Surplus	4,366,300,000	4,447,412,000
Retained Earnings (Accumulated Deficit)	1,940,170,000	2,147,915,000
Treasury stock, at cost	(870,675,000)	(459,814,000)
Accumulated other comprehensive (loss) income, net of tax	210,623,000	(169,938,000)	(323,979,000)
Total stockholders' equity	5,669,605,000	6,016,779,000	$ 5,440,060,000	$ 5,435,057,000
Total liabilities and stockholders' equity	52,803,639,000	52,115,324,000
Elimination
Assets:
Cash and due from banks	(76,619,000)	(56,008,000)
Money market investments	(224,100,000)	(237,029,000)
Trading account debt securities, at fair value	0	0
Debt Securities Available for Sale, at Fair Value	0	0
Debt securities held-to-maturity	0	0
Less - Allowance for credit losses	0
Debt securities held-to-maturity, net	0
Equity securities	(119,000)	(199,000)
Investment in subsidiaries	(7,627,201,000)	(8,049,648,000)
Loans held-for-sale, at lower of cost or fair value	0	0
Loans held-in-portfolio:
Loans held-in-portfolio	5,955,000	5,955,000
Less - Unearned income	0	0
Allowance for credit losses	0	0
Total loans held-in-portfolio, net	5,955,000	5,955,000
Premises and equipment, net	0	0
Other real estate	0	0
Accrued income receivable	(79,000)	(249,000)
Mortgage servicing assets, at fair value	0	0
Other assets	(20,182,000)	(18,383,000)
Goodwill	(1,000)	(1,000)
Other intangible assets	0	0
Total assets	(7,942,346,000)	(8,355,562,000)
Deposits:
Non-interest bearing	(76,619,000)	(56,008,000)
Interest bearing	(224,100,000)	(237,029,000)
Total deposits	(300,719,000)	(293,037,000)
Assets sold under agreements to repurchase	0	0
Other short-term borrowings	0
Notes payable	0	0
Other liabilities	(20,758,000)	(18,708,000)
Total liabilities	(321,477,000)	(311,745,000)
Stockholders' equity:
Preferred stock	0	0
Common stock	(56,309,000)	(56,309,000)
Surplus	(10,011,351,000)	(10,011,852,000)
Retained Earnings (Accumulated Deficit)	2,697,085,000	1,861,504,000
Treasury stock, at cost	(110,000)	(110,000)
Accumulated other comprehensive (loss) income, net of tax	(250,184,000)	162,950,000
Total stockholders' equity	(7,620,869,000)	(8,043,817,000)
Total liabilities and stockholders' equity	(7,942,346,000)	(8,355,562,000)
Popular, Inc. Holding Co.
Assets:
Cash and due from banks	76,617,000	55,956,000
Money market investments	211,343,000	221,598,000
Trading account debt securities, at fair value	0	0
Debt Securities Available for Sale, at Fair Value	0	0
Debt securities held-to-maturity	8,726,000	8,726,000
Less - Allowance for credit losses	0
Debt securities held-to-maturity, net	8,726,000
Equity securities	11,284,000	10,744,000
Investment in subsidiaries	5,880,938,000	6,243,065,000
Loans held-for-sale, at lower of cost or fair value	0	0
Loans held-in-portfolio:
Loans held-in-portfolio	31,888,000	32,027,000
Less - Unearned income	0	0
Allowance for credit losses	374,000	410,000
Total loans held-in-portfolio, net	31,514,000	31,617,000
Premises and equipment, net	4,371,000	3,893,000
Other real estate	146,000	146,000
Accrued income receivable	272,000	382,000
Mortgage servicing assets, at fair value	0	0
Other assets	95,083,000	93,835,000
Goodwill	0	0
Other intangible assets	6,439,000	6,463,000
Total assets	6,326,733,000	6,676,425,000
Deposits:
Non-interest bearing	0	0
Interest bearing	0	0
Total deposits	0	0
Assets sold under agreements to repurchase	0	0
Other short-term borrowings	0
Notes payable	586,435,000	586,119,000
Other liabilities	70,844,000	73,596,000
Total liabilities	657,279,000	659,715,000
Stockholders' equity:
Preferred stock	22,143,000	50,160,000
Common stock	1,044,000	1,044,000
Surplus	4,357,512,000	4,438,706,000
Retained Earnings (Accumulated Deficit)	1,948,697,000	2,156,442,000
Treasury stock, at cost	(870,565,000)	(459,704,000)
Accumulated other comprehensive (loss) income, net of tax	210,623,000	(169,938,000)
Total stockholders' equity	5,669,454,000	6,016,710,000
Total liabilities and stockholders' equity	6,326,733,000	6,676,425,000
PNA Holding Co.
Assets:
Cash and due from banks	0	0
Money market investments	13,099,000	16,029,000
Trading account debt securities, at fair value	0	0
Debt Securities Available for Sale, at Fair Value	0	0
Debt securities held-to-maturity	2,835,000	2,835,000
Less - Allowance for credit losses	0
Debt securities held-to-maturity, net	2,835,000
Equity securities	20,000	20,000
Investment in subsidiaries	1,746,263,000	1,806,583,000
Loans held-for-sale, at lower of cost or fair value	0	0
Loans held-in-portfolio:
Loans held-in-portfolio	0	0
Less - Unearned income	0	0
Allowance for credit losses	0	0
Total loans held-in-portfolio, net	0	0
Premises and equipment, net	0	0
Other real estate	0	0
Accrued income receivable	12,000	108,000
Mortgage servicing assets, at fair value	0	0
Other assets	21,614,000	21,324,000
Goodwill	0	0
Other intangible assets	0	0
Total assets	1,783,843,000	1,846,899,000
Deposits:
Non-interest bearing	0	0
Interest bearing	0	0
Total deposits	0	0
Assets sold under agreements to repurchase	0	0
Other short-term borrowings	0
Notes payable	94,097,000	94,090,000
Other liabilities	1,651,000	3,200,000
Total liabilities	95,748,000	97,290,000
Stockholders' equity:
Preferred stock	0	0
Common stock	2,000	2,000
Surplus	4,173,039,000	4,173,169,000
Retained Earnings (Accumulated Deficit)	(2,516,370,000)	(2,425,429,000)
Treasury stock, at cost	0	0
Accumulated other comprehensive (loss) income, net of tax	31,424,000	1,867,000
Total stockholders' equity	1,688,095,000	1,749,609,000
Total liabilities and stockholders' equity	1,783,843,000	1,846,899,000
All other subsidiaries and eliminations
Assets:
Cash and due from banks	445,553,000	388,363,000
Money market investments	5,941,374,000	3,261,688,000
Trading account debt securities, at fair value	42,545,000	40,321,000
Debt Securities Available for Sale, at Fair Value	15,813,301,000	17,648,473,000
Debt securities held-to-maturity	83,702,000	86,101,000
Less - Allowance for credit losses	13,390,000
Debt securities held-to-maturity, net	70,312,000
Equity securities	151,873,000	149,322,000
Investment in subsidiaries	0	0
Loans held-for-sale, at lower of cost or fair value	87,855,000	59,203,000
Loans held-in-portfolio:
Loans held-in-portfolio	27,809,997,000	27,549,874,000
Less - Unearned income	185,568,000	180,983,000
Allowance for credit losses	919,342,000	477,298,000
Total loans held-in-portfolio, net	26,705,087,000	26,891,593,000
Premises and equipment, net	547,636,000	552,757,000
Other real estate	123,776,000	121,926,000
Accrued income receivable	175,873,000	180,630,000
Mortgage servicing assets, at fair value	147,311,000	150,906,000
Other assets	1,691,922,000	1,722,839,000
Goodwill	671,123,000	671,123,000
Other intangible assets	19,868,000	22,317,000
Total assets	52,635,409,000	51,947,562,000
Deposits:
Non-interest bearing	9,473,068,000	9,216,181,000
Interest bearing	35,624,827,000	34,835,462,000
Total deposits	45,097,895,000	44,051,643,000
Assets sold under agreements to repurchase	178,766,000	193,378,000
Other short-term borrowings	100,000,000
Notes payable	377,599,000	421,399,000
Other liabilities	948,224,000	986,865,000
Total liabilities	46,702,484,000	45,653,285,000
Stockholders' equity:
Preferred stock	0	0
Common stock	56,307,000	56,307,000
Surplus	5,847,100,000	5,847,389,000
Retained Earnings (Accumulated Deficit)	(189,242,000)	555,398,000
Treasury stock, at cost	0	0
Accumulated other comprehensive (loss) income, net of tax	218,760,000	(164,817,000)
Total stockholders' equity	5,932,925,000	6,294,277,000
Total liabilities and stockholders' equity	$ 52,635,409,000	$ 51,947,562,000