Restructuring - Summary (Details) - 2018 Restructuring Plan - USD ($) $ in Millions |
3 Months Ended | |
---|---|---|
Mar. 31, 2019 |
Dec. 31, 2018 |
|
Restructuring Cost and Reserve [Line Items] | ||
Initial Charge Recorded | $ 25 | |
Ending Reserve Balance | 19 | $ 24 |
Operating Segments | Ratings | ||
Restructuring Cost and Reserve [Line Items] | ||
Initial Charge Recorded | 8 | |
Ending Reserve Balance | 7 | |
Operating Segments | Market Intelligence | ||
Restructuring Cost and Reserve [Line Items] | ||
Initial Charge Recorded | 7 | |
Ending Reserve Balance | 5 | |
Corporate | ||
Restructuring Cost and Reserve [Line Items] | ||
Initial Charge Recorded | 10 | |
Ending Reserve Balance | $ 7 |