XML 61 R50.htm IDEA: XBRL DOCUMENT v3.25.3

Related party transactions - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Related Party Transactions [Abstract]
Management fee received	$ 5	$ 7

X

- Definition

Related Party Transaction, Management Fee Received

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration