General (Details)	6 Months Ended
	Jun. 30, 2021 item country
General
Number of countries company has actively marketed rigs for land based drilling operations | country	20
Actively marketed rigs for offshore based drilling operations	29
United States and Canada
General
Actively marketed rigs for land based drilling operations	354
Countries Other Than United States and Canada
General
Actively marketed rigs for land based drilling operations	14