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v3.20.4

Commitments and contingencies (Details) $ in Millions |  | 1 Months Ended | 6 Months Ended | 12 Months Ended | 24 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Apr. 21, 2020 USD ($) | Mar. 31, 2019 rig | Dec. 31, 2018 USD ($) | Jul. 01, 2018 USD ($) | Dec. 31, 2020 USD ($) contract | Dec. 31, 2019 USD ($) | Dec. 31, 2020 USD ($) contract | Mar. 26, 2020 USD ($)
Guarantor Obligations [Line Items] |  |  |  |  |  |  |  |
Number of newbuilding contracts terminated | contract |  |  |  |  | 8 |  | 8 |
Number of rigs included in legal proceedings | rig |  | 8 |  |  |  |  |  |
Maximum guarantee |  |  |  |  | $ 282.0 | $ 311.0 | $ 282.0 |
Insurance deductible |  |  |  |  | 1.3 |  | 1.3 |
Loss incident - amounts recovered |  |  |  |  |  |  | 15.3 |
Losses recoverable under insurance |  |  |  |  | 6.4 |  | 6.4 |
Loss of hire insurance settlement |  |  | $ 0.0 | $ 0.0 | 9.0 | 10.0 | 19.5 |
Loss from Catastrophes |  |  |  |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |  |  |  |
Loss incident - costs to repair equipment |  |  |  |  |  |  | 23.0 |
Guarantees in favor of customers |  |  |  |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |  |  |  |
Maximum guarantee |  |  |  |  | 150.0 | 165.0 | 150.0 |
Total amount guaranteed |  |  |  |  | 132.0 | 146.0 | 132.0 |
Guarantees in favor of customers | Seadrill Partners |  |  |  |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |  |  |  |
Maximum guarantee |  |  |  |  | 0.0 | 15.0 | 0.0 |
Guarantees in favor of customers | Northern Ocean |  |  |  |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |  |  |  |
Maximum guarantee |  |  |  |  | 100.0 | 100.0 | 100.0 |
Guarantees in favor of customers | Sonadrill |  |  |  |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |  |  |  |
Maximum guarantee |  |  |  |  | 50.0 | 50.0 | 50.0 |
Guarantee in favor of banks |  |  |  |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |  |  |  |
Maximum guarantee |  |  |  |  | $ 132.0 | $ 146.0 | $ 132.0 |
Guarantee, amount called by lenders | $ 16.0 |  |  |  |  |  |  |
Guarantee in favor of banks | SeaMex |  |  |  |  |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |  |  |  |  |
Maximum guarantee |  |  |  |  |  |  |  | $ 22.0
Guarantee, amount called by lenders | $ 8.0 |  |  |  |  |  |  |

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