Share Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement [Abstract]

Summary Of Non-Vested Share Award Related Compensation Expense Recognized

The following table summarizes share award and cash-settled award compensation expense recognized during each of the years in the three-year period ended December 31, 2020 (in millions):


	2020		2019		2018
Contract drilling	$	10.7	$	22.1	$	18.9
General and administrative	9.2		17.4		14.5
	19.9		39.5		33.4
Tax benefit	(1.8)		(2.5)		(2.8)
Total	$	18.1	$	37.0	$	30.6

Summary Of Value Of Non-Vested Share Awards Granted And Vested

The following table summarizes the value of share awards and cash-settled awards granted and vested during each of the years in the three-year period ended December 31, 2020:


	Share Awards						Cash-Settled Awards
	2020		2019		2018		2020		2019		2018
Weighted-average grant-date fair value of share awards granted (per share)	$	3.07	$	11.50	$	24.62	$	0.75	$	—	$	21.35
Total fair value of share awards vested during the period (in millions)	$	3.26	$	17.70	$	7.50	$	0.22	$	3.50	$	9.90

Summary Of Non-Vested Share Award Activity

The following table summarizes share awards and cash-settled awards activity for the year ended December 31, 2020 (shares in thousands):


	Share Awards			Cash-settled Awards
	Awards	Weighted-Average Grant-Date Fair Value		Awards	Weighted-Average Grant-Date Fair Value
Share awards and cash-settled awards as of December 31, 2019	6,433	$	19.89	697	$	46.28
Granted	1,118	3.07		66	0.75
Vested	(2,473)	16.55		(342)	29.59
Forfeited	(2,096)	8.15		(110)	28.01
Share awards and cash-settled awards as of December 31, 2020	2,982	$	16.40	311	$	22.74