Restructuring and Integration - Schedule of Accrued Restructuring Liability (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | 9 Months Ended | |
|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Jun. 30, 2021 |
Sep. 30, 2020 |
|
| Restructuring Cost And Reserve [Line Items] | ||||
| Accrued restructuring liability, Beginning balance | $ 6 | $ 15 | ||
| Restructuring charges | 3 | $ 10 | 9 | $ 57 |
| Cash payments | (5) | (18) | ||
| Accrued restructuring liability, Ending Balance | 4 | 6 | ||
| Severance and Related Benefits | ||||
| Restructuring Cost And Reserve [Line Items] | ||||
| Accrued restructuring liability, Beginning balance | 6 | 12 | ||
| Restructuring charges | 1 | 7 | ||
| Cash payments | (3) | (13) | ||
| Accrued restructuring liability, Ending Balance | 4 | 6 | ||
| Other Restructuring Costs | ||||
| Restructuring Cost And Reserve [Line Items] | ||||
| Accrued restructuring liability, Beginning balance | 3 | |||
| Restructuring charges | 2 | 2 | ||
| Cash payments | $ (2) | $ (5) | ||