Statement Of Changes In Equity [Abstract]

Compagnie de Saint-Gobain - Filing #2813583

Concept	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-01-01	As at 2021-01-01	As at 2021-01-01	As at 2021-01-01	As at 2021-01-01	As at 2021-01-01	As at 2021-01-01	As at 2021-01-01	As at 2021-01-01
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	23 154 EUR	—	—	—	—	—	443,000,000 EUR	18 457 EUR	323,000,000 EUR	2 063 EUR	1 614 EUR	22 711 EUR	4 129 EUR	—	—	1,000,000 EUR	—	—	—	204,000,000 EUR	16 244 EUR	—	—	21 126 EUR	—	—	4 544 EUR	16,000,000 EUR	—	20 715 EUR	—	1 949 EUR	2 096 EUR	411,000,000 EUR	—	—	2 857 EUR	2 131 EUR	18 203 EUR	13 687 EUR	5 104 EUR	48,000,000 EUR	17 892 EUR	125,000,000 EUR	311,000,000 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	EUR	EUR	3 101 EUR	3 003 EUR	98,000,000 EUR	—	—	—	—	—	—	—	EUR	EUR	—	3 003 EUR	EUR	93,000,000 EUR	—	—	EUR	2 521 EUR	—	EUR	EUR	—	—	EUR	—	EUR	—	—	—	2 614 EUR	2 521 EUR	—	—	—	—	—	—	—	—	—
Other comprehensive income	—	EUR	EUR	311,000,000 EUR	26,000,000 EUR	13,000,000 EUR	—	—	—	—	—	—	—	EUR	15,000,000 EUR	—	324,000,000 EUR	335,000,000 EUR	2,000,000 EUR	—	—	EUR	1 618 EUR	—	908,000,000 EUR	32,000,000 EUR	—	—	EUR	—	EUR	—	—	—	1 620 EUR	678,000,000 EUR	—	—	—	—	—	—	—	—	—
Comprehensive income	—	EUR	EUR	3 412 EUR	2 977 EUR	85,000,000 EUR	—	—	—	—	—	—	—	EUR	15,000,000 EUR	—	3 327 EUR	335,000,000 EUR	95,000,000 EUR	—	—	EUR	4 139 EUR	—	908,000,000 EUR	32,000,000 EUR	—	—	EUR	—	EUR	—	—	—	4 234 EUR	3 199 EUR	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	—	EUR	EUR	911,000,000 EUR	833,000,000 EUR	78,000,000 EUR	—	—	—	—	—	—	—	EUR	EUR	—	833,000,000 EUR	EUR	31,000,000 EUR	—	—	EUR	698,000,000 EUR	—	EUR	EUR	—	—	EUR	—	EUR	—	—	—	729,000,000 EUR	698,000,000 EUR	—	—	—	—	—	—	—	—	—
Increase through other contributions by owners, equity	—	EUR	EUR	15,000,000 EUR	EUR	15,000,000 EUR	—	—	—	—	—	—	—	EUR	EUR	—	EUR	EUR	13,000,000 EUR	—	—	EUR	EUR	—	EUR	EUR	—	—	EUR	—	EUR	—	—	—	13,000,000 EUR	EUR	—	—	—	—	—	—	—	—	—
Increase (decrease) through treasury share transactions, equity	—	789,000,000 EUR	EUR	781,000,000 EUR	8,000,000 EUR	EUR	—	—	—	—	—	—	—	EUR	EUR	—	781,000,000 EUR	EUR	EUR	—	—	873,000,000 EUR	854,000,000 EUR	—	EUR	EUR	—	—	EUR	—	EUR	—	—	—	854,000,000 EUR	19,000,000 EUR	—	—	—	—	—	—	—	—	—
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity	—	EUR	EUR	28,000,000 EUR	18,000,000 EUR	10,000,000 EUR	—	—	—	—	—	—	—	EUR	EUR	—	18,000,000 EUR	EUR	23,000,000 EUR	—	—	EUR	21,000,000 EUR	—	EUR	EUR	—	—	EUR	—	EUR	—	—	—	2,000,000 EUR	21,000,000 EUR	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	—	EUR	EUR	43,000,000 EUR	43,000,000 EUR	EUR	—	—	—	—	—	—	—	EUR	EUR	—	43,000,000 EUR	EUR	EUR	—	—	EUR	58,000,000 EUR	—	EUR	EUR	—	—	EUR	—	EUR	—	—	—	58,000,000 EUR	58,000,000 EUR	—	—	—	—	—	—	—	—	—