Statement Of Comprehensive Income [Abstract]

Bouygues SA - Filing #883004

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	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
Statement of comprehensive income [abstract]
Profit (loss)	180,000,000 EUR	—	1 125 EUR	1 125 EUR	1 305 EUR	770,000,000 EUR	74,000,000 EUR	696,000,000 EUR	—	696,000,000 EUR
Other comprehensive income [abstract]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will not be reclassified to profit or loss, net of tax	—	—	—	—	45,000,000 EUR	31,000,000 EUR	—	—	—	—
Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract]
Exchange differences on translation [abstract]
Other comprehensive income, net of tax, exchange differences on translation of foreign operations	6,000,000 EUR	—	—	183,000,000 EUR	189,000,000 EUR	—	—	—	—	—
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax	—	—	—	—	83,000,000 EUR	24,000,000 EUR	—	—	—	—
Other comprehensive income	12,000,000 EUR	241,000,000 EUR	—	241,000,000 EUR	253,000,000 EUR	197,000,000 EUR	15,000,000 EUR	182,000,000 EUR	182,000,000 EUR	—
Comprehensive income	192,000,000 EUR	241,000,000 EUR	1 125 EUR	1 366 EUR	1 558 EUR	573,000,000 EUR	59,000,000 EUR	514,000,000 EUR	182,000,000 EUR	696,000,000 EUR
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	—	1 366 EUR	514,000,000 EUR	—	—	—	—
Comprehensive income, attributable to non-controlling interests	—	—	—	—	192,000,000 EUR	59,000,000 EUR	—	—	—	—