Loss on Impairment	12 Months Ended
Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Loss on Impairment	Note 8— Loss on Impairment Asset Impairments Consistent with our accounting policies discussed in “Note 1— Organization and Significant Accounting Policies,” we evaluate our property and equipment for impairment whenever there are changes in facts which suggest that the value of the asset is not recoverable. During 2022 and 2021, we did not identify any impairment triggers for our property and equipment. The economic impacts of the pandemic in 2020, including the growing commitments by many of our customers to a transition to cleaner energy options, oversupply of offshore drilling units, a steep decline in demand for oil, and a substantial oil surplus, all of which we considered impairment indicators, resulted in us recognizing approximately $3.9 billion in non-cash impairment charges for seven floaters and nine jackups, and $24 million of impairment charges related to certain capital spare equipment during the year ended December 31, 2020. We estimated the fair values of these units using a weighting between an income valuation approach and a market approach, utilizing significant unobservable inputs, representative of a Level 3 fair value measurement. Assumptions used in our assessment included, but were not limited to, future marketability of each unit in light of the current market conditions and its current technical specifications, timing of future contract awards and expected operating dayrates, operating costs, utilization rates, discount rates, capital expenditures, market values, weighting of market values, reactivation costs, estimated economic useful lives and, in certain cases, our belief that a drilling unit is no longer marketable and is unlikely to return to service in the near to medium term.

Loss on Impairment

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Note 8— Loss on Impairment

Asset Impairments

Consistent with our accounting policies discussed in “Note 1— Organization and Significant Accounting Policies,” we evaluate our property and equipment for impairment whenever there are changes in facts which suggest that the value of the asset is not recoverable. During 2022 and 2021, we did not identify any impairment triggers for our property and equipment.

The economic impacts of the pandemic in 2020, including the growing commitments by many of our customers to a transition to cleaner energy options, oversupply of offshore drilling units, a steep decline in demand for oil, and a substantial oil surplus, all of which we considered impairment indicators, resulted in us recognizing approximately $3.9 billion in non-cash impairment charges for seven floaters and nine jackups, and $24 million of impairment charges related to certain capital spare equipment during the year ended December 31, 2020. We estimated the fair values of these units using a weighting between an income valuation approach and a market approach, utilizing significant unobservable inputs, representative of a Level 3 fair value measurement. Assumptions used in our assessment included, but were not limited to, future marketability of each unit in light of the current market conditions and its current technical specifications, timing of future contract awards and expected operating dayrates, operating costs, utilization rates, discount rates, capital expenditures, market values, weighting of market values, reactivation costs, estimated economic useful lives and, in certain cases, our belief that a drilling unit is no longer marketable and is unlikely to return to service in the near to medium term.