Analysis Of Income And Expense [Abstract]

DNB Bank ASA - Filing #2618703

Concept	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31
Analysis of income and expense [abstract]
Revenue [abstract]
Interest income	—	—	—	—	—	—	—	—	—	—	—	—
Interest income on loans and advances to customers	—	—	—	—	42 060 NOK	—	—	48 628 NOK	—	—	—	—
Interest income on other financial assets	—	—	—	—	2 890 NOK	—	—	4 636 NOK	—	—	—	—
Material income and expense [abstract]
Interest expense	—	—	—	—	—	—	—	—	—	—	—	—
Interest expense on deposits from banks	—	—	—	—	1 023 NOK	—	—	1 154 NOK	—	—	—	—
Interest expense on deposits from customers	—	—	—	—	3 475 NOK	—	—	6 597 NOK	—	—	—	—
Interest expense on other financial liabilities	—	—	—	—	3 504 NOK	—	—	5 161 NOK	—	—	—	—
Interest income (expense)	—	—	—	—	38 690 NOK	—	—	38 623 NOK	—	—	—	—
Selling, general and administrative expense [abstract]
General and administrative expense	—	—	—	—	6 845 NOK	—	—	7 208 NOK	—	—	—	—
Revenue and other operating income	—	—	—	—	55 915 NOK	—	—	56 399 NOK	—	—	—	—
Operating expense	—	—	—	—	24 034 NOK	—	—	23 401 NOK	—	—	—	—
Fee and commission income (expense) [abstract]
Fee and commission income [abstract]
Fee and commission income	—	—	—	—	14 992 NOK	—	—	13 289 NOK	—	—	—	—
Fee and commission expense [abstract]
Fee and commission expense	—	—	—	—	3 981 NOK	—	—	3 789 NOK	—	—	—	—
Fee and commission income (expense)	—	—	—	—	10 974 NOK	—	—	9 523 NOK	—	—	—	—
Expenses by nature [abstract]
Classes of employee benefits expense [abstract]
Employee benefits expense	—	—	—	—	13 826 NOK	—	—	12 873 NOK	—	—	—	—
Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract]
Depreciation and amortisation expense [abstract]
Depreciation and amortisation expense	—	—	—	—	3 363 NOK	—	—	3 320 NOK	—	—	—	—
Disclosure of attribution of expenses by nature to their function [text block]	—	—	—	—	—	—	—	—	—	—	—	—
Disclosure of attribution of expenses by nature to their function [abstract]
Disclosure of attribution of expenses by nature to their function [line items]
Miscellaneous other comprehensive income [abstract]
Other comprehensive income, net of tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract]
Other comprehensive income, net of tax, exchange differences on translation of foreign operations	1,000,000 NOK	—	—	1 018 NOK	1 018 NOK	—	—	3 519 NOK	4,000,000 NOK	—	—	3 515 NOK
Other comprehensive income, before tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract]
Other comprehensive income, before tax, hedges of net investments in foreign operations	—	—	—	680,000,000 NOK	680,000,000 NOK	—	—	3 246 NOK	—	—	—	3 246 NOK
Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract]
Share of profit (loss) of associates accounted for using equity method	—	—	—	—	524,000,000 NOK	—	—	402,000,000 NOK	—	—	—	—
Income tax relating to components of other comprehensive income [abstract]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	—	—	—	—	41,000,000 NOK	—	—	72,000,000 NOK	—	—	—	—
Income tax relating to components of other comprehensive income that will be reclassified to profit or loss	—	—	—	—	148,000,000 NOK	—	—	786,000,000 NOK	—	—	—	—
Income tax relating to components of other comprehensive income	—	—	7,000,000 NOK	170,000,000 NOK	107,000,000 NOK	70,000,000 NOK	55,000,000 NOK	858,000,000 NOK	—	8,000,000 NOK	—	812,000,000 NOK
Comprehensive income, continuing and discontinued operations [abstract]
Comprehensive income	27,000,000 NOK	922,000,000 NOK	22,000,000 NOK	509,000,000 NOK	24 674 NOK	24 212 NOK	18 545 NOK	20 783 NOK	1 1 NOK	25,000,000 NOK	1 143 NOK	1 081 NOK