Statement Of Changes In Equity [Abstract]

FLSmidth & Co. - Filing #1442819

Concept	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-01-01	As at 2020-01-01	As at 2020-01-01	As at 2020-01-01	As at 2020-01-01	As at 2020-01-01	As at 2020-01-01	As at 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-01-01	As at 2019-01-01	As at 2019-01-01	As at 2019-01-01	As at 2019-01-01	As at 2019-01-01	As at 2019-01-01
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	8,246,000,000 DKK	6,000,000 DKK	4,000,000 DKK	8,136,000,000 DKK	1,025,000,000 DKK	—	—	1,131,000,000 DKK	—	8,130,000,000 DKK	—	—	—	1,025,000,000 DKK	28,000,000 DKK	8,082,000,000 DKK	8,793,000,000 DKK	14,000,000 DKK	300,000,000 DKK	8,779,000,000 DKK	8,779,000,000 DKK	—	14,000,000 DKK	—	300,000,000 DKK	—	—	8,793,000,000 DKK	8,082,000,000 DKK	—	28,000,000 DKK	—	1,025,000,000 DKK	—	53,000,000 DKK	1,025,000,000 DKK	7,738,000,000 DKK	8,266,000,000 DKK	10,000,000 DKK	8,256,000,000 DKK	454,000,000 DKK
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	205,000,000 DKK	—	—	—	—	—	210,000,000 DKK	—	—	—	—	—	5,000,000 DKK	210,000,000 DKK	—	—	—	—	—	—	—	—	—	—	775,000,000 DKK	—	775,000,000 DKK	1,000,000 DKK	—	—	776,000,000 DKK	—	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	833,000,000 DKK	—	—	—	—	—	25,000,000 DKK	24,000,000 DKK	—	0 DKK	—	831,000,000 DKK	1,000,000 DKK	832,000,000 DKK	—	—	—	—	—	—	—	—	154,000,000 DKK	—	164,000,000 DKK	—	15,000,000 DKK	0 DKK	—	—	164,000,000 DKK	—	25,000,000 DKK	—	0 DKK	—	—	—	—	—	—	—
Comprehensive income	628,000,000 DKK	—	—	—	—	—	185,000,000 DKK	24,000,000 DKK	—	0 DKK	—	831,000,000 DKK	6,000,000 DKK	622,000,000 DKK	—	—	—	—	—	—	—	—	154,000,000 DKK	—	939,000,000 DKK	—	760,000,000 DKK	1,000,000 DKK	—	—	940,000,000 DKK	—	25,000,000 DKK	—	0 DKK	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	14,000,000 DKK	—	—	—	—	—	0 DKK	—	—	—	—	—	14,000,000 DKK	0 DKK	—	—	—	—	—	—	—	—	—	—	450,000,000 DKK	—	450,000,000 DKK	—	—	—	450,000,000 DKK	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	21,000,000 DKK	—	—	—	—	—	21,000,000 DKK	—	—	—	—	—	—	21,000,000 DKK	—	—	—	—	—	—	—	—	—	—	13,000,000 DKK	—	13,000,000 DKK	—	—	—	13,000,000 DKK	—	—	—	—	—	—	—	—	—	—	—