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Property And Equipment (Tables)
12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Schedule Of Property And Equipment
Property and equipment as of December 31, 2020 and 2019 consisted of the following (in millions):
20202019
Drilling rigs and equipment$12,584.4 $17,714.0 
Work-in-progress446.1 473.6 
Other178.8 206.2 
 $13,209.3 $18,393.8