Borrowings - Long-Term Debt, Debt Issued (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Sep. 30, 2022 |
Mar. 31, 2022 |
Mar. 31, 2021 |
|
| U.S dollar. fixed-rate notes | |||
| Notes Issued | |||
| Aggregate amount of debt issued | $ 3,250 | $ 1,800 | |
| U.S dollar. fixed-rate notes | Minimum | |||
| Notes Issued | |||
| Credit facility term | 3 years | 5 years | |
| Coupon rate (as a percent) | 4.00% | 2.20% | |
| U.S dollar. fixed-rate notes | Maximum | |||
| Notes Issued | |||
| Credit facility term | 30 years | 30 years | |
| Coupon rate (as a percent) | 4.90% | 3.43% | |
| Euro fixed-rate notes | |||
| Notes Issued | |||
| Aggregate amount of debt issued | $ 2,300 | ||
| Euro fixed-rate notes | Minimum | |||
| Notes Issued | |||
| Credit facility term | 8 years | ||
| Coupon rate (as a percent) | 0.875% | ||
| Euro fixed-rate notes | Maximum | |||
| Notes Issued | |||
| Credit facility term | 12 years | ||
| Coupon rate (as a percent) | 1.25% | ||
| IBM Credit LLC | Fixed rate debt due in 2021 to 2023 | |||
| Notes Issued | |||
| Outstanding debt redeemed | $ 1,750 | ||
| Aggregate principal redeemed (as a percent) | 100.00% | ||
| Loss upon redemption on notes | $ (22) | ||