Name:	do_ContractWithCustomerAssetIncreaseDueToRevenueRecognizedDuringPeriod
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of total contract liabilities for the obligation to transfer good or service to customer for which consideration as been received or is receivable, net of total contract assets for the right to consideration in exchange for good or service transferred to customer.

No definition available.

Name:	do_ContractWithCustomerAssetLiabilityNet
Namespace Prefix:	do_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount deferred during the period for an obligation to transfer good or service to customer for which consideration has been received or is due, excluding revenue recognized during the period.

No definition available.

Name:	do_ContractWithCustomerLiabilityIncreaseDueToCashReceived
Namespace Prefix:	do_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-Topic 606
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Name:	us-gaap_ContractWithCustomerLiability
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.