Debt Instrument, Issued As A Percent Of Par

No definition available.

Name:	sdrl_DebtInstrumentIssuedAsAPercentOfPar
Namespace Prefix:	sdrl_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line of Credit Facility, Accordion Feature, Increase Limit

+ References

No definition available.

+ Details

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Namespace Prefix:	sdrl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

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Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Debt - Narrative (Details) kr in Millions, $ in Millions		3 Months Ended	12 Months Ended		36 Months Ended
Debt - Narrative (Details) kr in Millions, $ in Millions	Jul. 27, 2023 USD ($)	Mar. 31, 2026 USD ($)	Jul. 27, 2028	Jul. 27, 2027	Jul. 27, 2026	Apr. 03, 2026 USD ($)	Dec. 31, 2025 USD ($)	Aug. 31, 2025 NOK (kr)	Aug. 31, 2023 USD ($)	Jul. 31, 2023 USD ($)	Feb. 23, 2022 USD ($)
Debt Instrument [Line Items]
Long-term debt		$ 614					$ 613
SFL Hercules Ltd
Debt Instrument [Line Items]
Guarantor obligations, maximum exposure, undiscounted		59						kr 574
$575 million secured bond (Level 1) \| Secured Debt
Debt Instrument [Line Items]
Debt instrument, face amount		575							$ 75	$ 500
Debt instrument, interest rate (as percent)									8.375%	8.375%
Debt issued as a percent of par (as a percent)									100.75%
Five Year First Lien Revolving Credit Facility \| SFL Hercules Ltd
Debt Instrument [Line Items]
Guarantor obligations, maximum exposure, undiscounted		41						kr 403
Five Year First Lien Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, term	5 years
Maximum borrowing capacity	$ 225
Line of credit facility, accordion feature, increase limit	$ 100
Outstanding letters of credit and bank guarantees		$ 47
Five Year First Lien Revolving Credit Facility \| Revolving Credit Facility \| Forecast
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage			1.00%	0.75%	0.50%
Five Year First Lien Revolving Credit Facility \| Revolving Credit Facility \| Term SOFR
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	0.10%
Five Year First Lien Revolving Credit Facility \| Revolving Credit Facility \| Daily Simple Secured Overnight Financing Rate
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	0.10%
Five Year First Lien Revolving Credit Facility \| Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		2.75%
Five Year First Lien Revolving Credit Facility \| Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR) \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		2.50%
Five Year First Lien Revolving Credit Facility \| Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR) \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		3.50%
Five Year First Lien Revolving Credit Facility \| Revolving Credit Facility \| SFL Hercules Ltd
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 178
Five Year First Lien Revolving Credit Facility \| Letter of Credit
Debt Instrument [Line Items]
Long-term debt	$ 50
Five Year First Lien Revolving Credit Facility \| Letter of Credit \| Subsequent event
Debt Instrument [Line Items]
Long-term debt						$ 100
Unsecured senior convertible bond \| Convertible debt
Debt Instrument [Line Items]
Debt instrument, face amount											$ 50
Debt instrument, interest rate (as percent)											6.00%
Debt conversion, converted instrument ratio		0.0526316