Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-based Compensation Expense [Table Text Block]

Share-based compensation expense is generally recognized within "General and administrative" expense on the Condensed Consolidated Statements of Operations and is summarized in the table below. During the three and six months ended June 30, 2019, the Company recorded an additional $1.3 million and $9.7 million, respectively, of share-based compensation expense related to the acceleration of vesting that occurred as part of the restructuring program, of which $1.5 million was recorded in "Net gain (loss) from asset sales, inclusive of restructuring costs" on the Condensed Consolidated Statement of Operations during the six months ended June 30, 2019 and the remaining $1.3 million and $8.2 million, respectively, is included in the table below. During the three and six months ended June 30, 2018, the Company recorded an additional $1.2 million and $4.0 million, respectively of share-based compensation expense, related to the acceleration of vesting that occurred as part of the restructuring program, all of which is included in the table below. Refer to Note 9 – Restructuring for additional information.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
	(in millions)
Stock options	$	—	$	0.2	$	0.3	$	0.7
Restricted share awards	4.8		6.8		10.9		15.6
Performance share units	0.3		5.1		5.5		7.0
Restricted share units	0.1		0.1		0.2		0.1
Total share-based compensation expense	$	5.2	$	12.2	$	16.9	$	23.4

Share-based Compensation, Stock Options, Activity [Table Text Block]

Stock option transactions under the terms of the LTSIP are summarized below:

	Options Outstanding		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value
			(per share)		(in years)	(in millions)
Outstanding at December 31, 2018	2,098,933		$	22.27
Cancelled	(283,029	)	30.90
Outstanding at June 30, 2019	1,815,904		$	20.93	2.80	$	—
Options Exercisable at June 30, 2019	1,761,139		$	21.08	2.74	$	—
Unvested Options at June 30, 2019	54,765		$	15.92	4.69	$	—

Schedule of Share-based Compensation, Restricted Share Awards Activity [Table Text Block]

Transactions involving restricted share awards under the terms of the LTSIP and LTIP are summarized below:

	Restricted Share Awards Outstanding		Weighted-Average Grant Date Fair Value
			(per share)
Unvested balance at December 31, 2018	3,822,133		$	10.76
Granted	2,217,794		7.98
Vested	(2,261,323	)	11.05
Forfeited	(178,985	)	9.23
Unvested balance at June 30, 2019	3,599,619		$	8.94

Transactions involving restricted share units under the terms of the LTSIP and LTIP are summarized below:

	Restricted Share Units Outstanding		Weighted-Average Grant Date Fair Value
			(per share)
Unvested balance at December 31, 2018	42,675		$	10.47
Granted	37,224		7.93
Vested and paid	(36,392	)	10.67
Unvested balance at June 30, 2019	43,507		$	8.16

Schedule of Other Share-based Compensation, PSUs & RSUs [Table Text Block]

Transactions involving performance share units under the terms of the CIP are summarized below:

	Performance Share Units Outstanding		Weighted-Average Grant Date Fair Value
			(per share)
Unvested balance at December 31, 2018	1,559,312		$	11.47
Granted	589,412		7.93
Vested and paid	(1,117,848	)	10.73
Unvested balance at June 30, 2019	1,030,876		$	9.63