Statement Of Cash Flows [Abstract]

Compagnie de Saint-Gobain - Filing #883081

Concept	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2019-12-31
Statement of cash flows [abstract]
Cash flows from (used in) operating activities [abstract]
Income taxes paid (refund), classified as operating activities	—	793,000,000 EUR	—	466,000,000 EUR	—
Cash flows from (used in) operating activities	—	4 439 EUR	—	4 711 EUR	—
Cash flows from (used in) investing activities [abstract]
Cash flows from losing control of subsidiaries or other businesses, classified as investing activities	—	120,000,000 EUR	—	43,000,000 EUR	—
Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities	—	913,000,000 EUR	—	1 100 EUR	—
Other cash receipts from sales of equity or debt instruments of other entities, classified as investing activities	—	4,000,000 EUR	—	2 389 EUR	—
Other cash payments to acquire equity or debt instruments of other entities, classified as investing activities	—	33,000,000 EUR	—	74,000,000 EUR	—
Cash flows from (used in) investing activities	—	2 199 EUR	—	194,000,000 EUR	—
Cash flows from (used in) financing activities [abstract]
Proceeds from changes in ownership interests in subsidiaries that do not result in loss of control	—	12,000,000 EUR	—	0 EUR	—
Payments from changes in ownership interests in subsidiaries that do not result in loss of control	—	9,000,000 EUR	—	29,000,000 EUR	—
Payments of lease liabilities, classified as financing activities	—	762,000,000 EUR	—	766,000,000 EUR	—
Cash flows from (used in) financing activities	—	3 789 EUR	—	1 300 EUR	—
Effect of exchange rate changes on cash and cash equivalents [abstract]
Effect of exchange rate changes on cash and cash equivalents	—	31,000,000 EUR	—	126,000,000 EUR	—
Increase (decrease) in cash and cash equivalents after effect of exchange rate changes	—	1 500 EUR	—	3 456 EUR	—
Cash and cash equivalents	6 943 EUR	—	8 443 EUR	—	4 987 EUR