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Property and Equipment Property and Equipment (Tables)
9 Months Ended
Sep. 30, 2020
Property, Plant and Equipment [Abstract]  
Schedule of Property And Equipment Property and equipment as of September 30, 2020 and December 31, 2019 consisted of the following (in millions):
September 30, 2020December 31, 2019
Drilling rigs and equipment$12,552.2 $17,714.0 
Work-in-progress473.3 473.6 
Other190.0 206.2 
$13,215.5 $18,393.8