Analysis Of Income And Expense [Abstract]

FLSmidth & Co. - Filing #1419872

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	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	2020-01-01 to 2020-12-31
Analysis of income and expense [abstract]
Revenue [abstract]
Revenue	—	—	—	—	—	17,581,000,000 DKK	—	—	—	16,441,000,000 DKK	—	—	—	—
Material income and expense [abstract]
Other operating income (expense)	—	—	—	—	—	41,000,000 DKK	—	—	—	36,000,000 DKK	—	—	—	—
Selling, general and administrative expense [abstract]
Selling expense	—	—	—	—	—	1,314,000,000 DKK	—	—	—	1,367,000,000 DKK	—	—	—	—
Income tax relating to components of other comprehensive income [abstract]
Income tax relating to components of other comprehensive income that will be reclassified to profit or loss	—	—	—	—	—	15,000,000 DKK	—	—	—	7,000,000 DKK	—	—	—	—
Income tax relating to components of other comprehensive income	—	—	—	—	0 DKK	0 DKK	0 DKK	6,000,000 DKK	—	6,000,000 DKK	—	—	—	6,000,000 DKK
Comprehensive income, continuing and discontinued operations [abstract]
Comprehensive income	0 DKK	50,000,000 DKK	0 DKK	466,000,000 DKK	844,000,000 DKK	844,000,000 DKK	428,000,000 DKK	185,000,000 DKK	0 DKK	628,000,000 DKK	831,000,000 DKK	6,000,000 DKK	24,000,000 DKK	622,000,000 DKK
Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	—	—	844,000,000 DKK	—	—	—	622,000,000 DKK	—	—	—	—
Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract]
Comprehensive income, attributable to non-controlling interests	—	—	—	—	—	0 DKK	—	—	—	6,000,000 DKK	—	—	—	—