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Revenue Recognition | 12 Months Ended
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Dec. 31, 2020
Revenue Recognition |
Revenue Recognition | Note 20 Revenue Recognition ​ We recognize revenue when control of a good or service promised in a contract (i.e., performance obligation) is transferred to a customer. Control is obtained when a customer has the ability to direct the use of and obtain substantially all the remaining benefits from that good or service. Contract drilling revenues are recorded over time utilizing the input method based on time elapsed. The measurement of progress considers the transfer of the service to the customer as we provide daily drilling services. We receive payment after the services have been performed by billing customers periodically (typically monthly). However, a portion of our revenues are recognized at a point-in-time as control is transferred at a distinct point in time such as with the sale of our top drives and other capital equipment. Within our drilling contracts, we have identified one performance obligation in which the transaction price is allocated. ​ Disaggregation of revenue ​ In the following table, revenue is disaggregated by geographical region. The table also includes a reconciliation of the disaggregated revenue with the reportable segments: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended
​ | ​ | December 31, 2020
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | U.S. Drilling | ​ | ​ | Canada Drilling | ​ | ​ | International Drilling | ​ | ​ | Drilling Solutions | ​ | ​ | Rig Technologies | ​ | ​ | Other | ​ | ​ | Total
​ | ​ | (In thousands)
Lower 48 | ​ | $ | 548,859 | ​ | $ | — | ​ | $ | — | ​ | $ | 88,919 | ​ | $ | 54,185 | ​ | $ | — | ​ | $ | 691,963
U.S. Offshore Gulf of Mexico | ​ |  | 126,292 | ​ |  | — | ​ |  | — | ​ |  | 9,309 | ​ |  | — | ​ |  | — | ​ | ​ | 135,601
Alaska | ​ |  | 37,906 | ​ |  | — | ​ |  | — | ​ |  | 1,296 | ​ |  | 19 | ​ |  | — | ​ | ​ | 39,221
Canada | ​ |  | — | ​ |  | 54,753 | ​ |  | — | ​ |  | 1,137 | ​ |  | 3,571 | ​ |  | — | ​ | ​ | 59,461
Middle East & Asia | ​ |  | — | ​ |  | — | ​ |  | 728,983 | ​ |  | 40,255 | ​ |  | 58,263 | ​ |  | — | ​ | ​ | 827,501
Latin America | ​ |  | — | ​ |  | — | ​ |  | 228,930 | ​ |  | 6,578 | ​ |  | 177 | ​ |  | — | ​ | ​ | 235,685
Europe, Africa & CIS | ​ |  | — | ​ |  | — | ​ |  | 173,760 | ​ |  | 2,340 | ​ |  | 15,340 | ​ |  | — | ​ | ​ | 191,440
Eliminations & other | ​ |  | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (46,829) | ​ |  | (46,829)
Total | ​ | $ | 713,057 | ​ | $ | 54,753 | ​ | $ | 1,131,673 | ​ | $ | 149,834 | ​ | $ | 131,555 | ​ | $ | (46,829) | ​ | $ | 2,134,043
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended
​ | ​ | December 31, 2019
​ | ​ | ​ | U.S. Drilling | ​ | ​ | Canada Drilling | ​ | ​ | International Drilling | ​ | ​ | Drilling Solutions | ​ | ​ | Rig Technologies | ​ | ​ | Other | ​ | ​ | Total
​ | ​ | (In thousands)
Lower 48 | ​ | $ | 1,021,879 | ​ | $ | — | ​ | $ | — | ​ | $ | 170,639 | ​ | $ | 172,559 | ​ | $ | — | ​ | $ | 1,365,077
U.S. Offshore Gulf of Mexico | ​ |  | 156,931 | ​ |  | — | ​ |  | — | ​ |  | 13,331 | ​ |  | — | ​ |  | — | ​ | ​ | 170,262
Alaska | ​ |  | 62,126 | ​ |  | — | ​ |  | — | ​ |  | 4,787 | ​ |  | 986 | ​ |  | — | ​ | ​ | 67,899
Canada | ​ |  | — | ​ |  | 68,274 | ​ |  | — | ​ |  | 1,749 | ​ |  | 8,852 | ​ |  | — | ​ | ​ | 78,875
Middle East & Asia | ​ |  | — | ​ |  | — | ​ |  | 765,493 | ​ |  | 43,941 | ​ |  | 56,455 | ​ |  | — | ​ | ​ | 865,889
Latin America | ​ |  | — | ​ |  | — | ​ |  | 355,189 | ​ |  | 15,558 | ​ |  | 2,318 | ​ |  | — | ​ | ​ | 373,065
Europe, Africa & CIS | ​ |  | — | ​ |  | — | ​ |  | 203,460 | ​ |  | 2,785 | ​ |  | 19,056 | ​ |  | — | ​ | ​ | 225,301
Eliminations & other | ​ |  | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (102,985) | ​ |  | (102,985)
Total | ​ | $ | 1,240,936 | ​ | $ | 68,274 | ​ | $ | 1,324,142 | ​ | $ | 252,790 | ​ | $ | 260,226 | ​ | $ | (102,985) | ​ | $ | 3,043,383
​ ​ ​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended
​ | ​ | December 31, 2018
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | U.S. Drilling | ​ | ​ | Canada Drilling | ​ | ​ | International Drilling | ​ | ​ | Drilling Solutions | ​ | ​ | Rig Technologies | ​ | ​ | Other | ​ | ​ | Total
​ | ​ | (In thousands)
Lower 48 | ​ | $ | 910,819 | ​ | $ | — | ​ | $ | — | ​ | $ | 173,219 | ​ | $ | 188,550 | ​ | $ | — | ​ | $ | 1,272,588
U.S. Offshore Gulf of Mexico | ​ |  | 122,946 | ​ |  | — | ​ |  | — | ​ |  | 13,776 | ​ |  | — | ​ |  | — | ​ | ​ | 136,722
Alaska | ​ |  | 49,462 | ​ |  | — | ​ |  | — | ​ |  | 3,670 | ​ |  | 777 | ​ |  | — | ​ | ​ | 53,909
Canada | ​ |  | — | ​ |  | 105,000 | ​ |  | — | ​ |  | 5,849 | ​ |  | 29,682 | ​ |  | — | ​ | ​ | 140,531
Middle East & Asia | ​ |  | — | ​ |  | — | ​ |  | 888,500 | ​ |  | 35,486 | ​ |  | 26,236 | ​ |  | — | ​ | ​ | 950,222
Latin America | ​ |  | — | ​ |  | — | ​ |  | 360,385 | ​ |  | 15,350 | ​ |  | 8,514 | ​ |  | — | ​ | ​ | 384,249
Europe, Africa & CIS | ​ |  | — | ​ |  | — | ​ |  | 220,153 | ​ |  | 2,892 | ​ |  | 17,229 | ​ |  | — | ​ | ​ | 240,274
Eliminations & other | ​ |  | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (120,876) | ​ |  | (120,876)
Total | ​ | $ | 1,083,227 | ​ | $ | 105,000 | ​ | $ | 1,469,038 | ​ | $ | 250,242 | ​ | $ | 270,988 | ​ | $ | (120,876) | ​ | $ | 3,057,619
​ Contract balances ​ We perform our obligations under a contract with a customer by transferring goods or services in exchange for consideration from the customer. We recognize a contract asset or liability when we transfer goods or services to a customer and bill an amount which differs from the revenue allocated to the related performance obligations. ​ The timing of revenue recognition may differ from the timing of invoicing to customers and these timing differences result in receivables, contract assets, or contract liabilities (deferred revenue) on our consolidated balance sheet. In general, we receive payments from customers based on dayrates as stipulated in our contracts (i.e. operating rate, standby rate). The invoices billed to the customer are based on the varying rates applicable to the operating status on each rig. Accounts receivable are recorded when the right to consideration becomes unconditional. ​ Dayrate contracts also may contain fees charged to the customer for up-front rig modifications, mobilization and demobilization of equipment and personnel. These fees are associated with contract fulfillment activities, and the related revenue (subject to any constraint on estimates of variable consideration) is allocated to a single performance obligation and recognized ratably over the initial term of the contract. Mobilization fees are generally billable to the customer in the initial phase of a contract and generate contract liabilities until they are recognized as revenue. Demobilization fees are generally received at the end of the contract and generate contract assets when they are recognized as revenue prior to becoming receivables from the customer. ​ We receive reimbursements from our customers for the purchase of supplies, equipment, personnel services and other services provided at their request. Reimbursable revenues are variable and subject to uncertainty as the amounts received and timing thereof are dependent on factors outside of our influence. Accordingly, these revenues are constrained and not recognized until the uncertainty is resolved, which typically occurs when the related costs are incurred on behalf of the customer. We are generally considered a principal in these transactions and record the associated revenues at the gross amounts billed to the customer. ​ The opening and closing balances of our receivables, contract assets and current and long-term contract liabilities are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Contract | ​ | Contract | ​ | Contract | ​ | Contract
​ | ​ | Contract | ​ | Assets | ​ | Assets | ​ | Liabilities | ​ | Liabilities
​ |  | Receivables |  | (Current) |  | (Long-term) |  | (Current) |  | (Long-term)
​ | ​ | (In millions)
As of December 31, 2019 | ​ | $ | 507.0 | ​ | $ | 48.6 | ​ | $ | 24.9 | ​ | $ | 66.8 | ​ | $ | 70.5
As of December 31, 2020 | ​ | $ | 427.2 | ​ | $ | 23.5 | ​ | $ | 6.8 | ​ | $ | 42.8 | ​ | $ | 44.2
​ Approximately 61% of the contract liability balance at the beginning of the period was recognized as revenue during 2020 and 16% is expected to be recognized during 2021. The remaining 23% of the contract liability balance at the beginning of the period is expected to be recognized as revenue during 2022 or thereafter. ​ Additionally, 64% of the contract asset balance at the beginning of the period was recognized as expense during 2020 and 22% is expected to be recognized during 2021. The remaining 14% of the contract asset balance at the beginning of the period is expected to be recognized as expense during 2022 or thereafter. This disclosure does not include variable consideration allocated entirely to a wholly unsatisfied performance obligation or promise to transfer a distinct good or service that forms part of a single performance obligation.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI http://asc.fasb.org/topic&trid=49130388 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130550-203045 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130558-203045 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 + Details
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