Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2019

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, 2019 (in millions):



	2019			2018			2017
Contract drilling	$	22.1		$	18.9		$	18.3
General and administrative	17.4			14.5			14.5
	39.5			33.4			32.8
Tax benefit	(2.5		)	(2.8		)	(4.8		)
Total	$	37.0		$	30.6		$	28.0

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, 2019:



	Share Awards						Cash-Settled Awards
	2019		2018		2017		2019		2018		2017
Weighted-average grant-date fair value of share awards granted (per share)	$	11.50	$	24.62	$	31.48	$	—	$	21.35	$	25.08
Total fair value of share awards vested during the period (in millions)	$	17.7	$	7.5	$	8.2	$	3.5	$	9.9	$	3.9

Summary Of Non-Vested Share Award Activity

The following table summarizes share awards and cash-settled awards activity for the year ended December 31, 2019 (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, 2018	2,017		$	31.36	1,279		$	29.20
Granted	4,460		11.50		—		—
Rowan share awards assumed	2,329		15.88		—		—
Vested	(1,519	)	10.53		(453	)	7.97
Forfeited	(854	)	8.87		(129	)	11.58
Share awards and cash-settled awards as of December 31, 2019	6,433		$	19.89	697		$	46.28