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Property and Equipment (Tables)
9 Months Ended
Sep. 30, 2021
Property, Plant and Equipment [Abstract]  
Schedule of Property And Equipment Property and equipment as of September 30, 2021 and December 31, 2020 consisted of the following (in millions):
SuccessorPredecessor
September 30,
2021
December 31, 2020
Drilling rigs and equipment$865.6 $12,584.4 
Work-in-progress33.3 446.1 
Other34.2 178.8 
$933.1 $13,209.3