Equity - Share Repurchases (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Total number of shares purchased | 0.7 | 2.8 | 5.7 | 5.4 |
Average price paid per share (USD per share) | $ 205.11 | $ 0.00 | $ 180.94 | $ 133.01 |
Total cash utilized | $ 1,113 | |||
Payments for Repurchase of Common Stock | $ 6 | 1,108 | $ 846 | |
Total SPGI Equity | ||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Total cash utilized | $ 13 | $ 500 | $ 1,113 | $ 846 |