Leases - Cash Flow Disclosure (Details) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
May 08, 2020 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Business Acquisition | ||||
| Operating cash flows from operating leases | $ 236 | $ 185 | $ 125 | |
| Right-of-use assets obtained in exchange for new operating lease liabilities | $ 66 | $ 692 | $ 26 | |
| Allergan plc | ||||
| Business Acquisition | ||||
| Right-of-use assets obtained in exchange for new operating lease liabilities | $ 453 | |||