Stock Plans (Tables)

3 Months Ended

Mar. 31, 2017

Stock Plans [Abstract]

LTIP Target Performance Shares

	Number of
	Shares
	(in thousands)
Balance at January 1, 2017	2,859
LTIP target performance shares granted, net	2,118
LTIP target performance shares earned	(617)
LTIP target performance shares forfeited	(64)
Balance at March 31, 2017	4,296

Restricted Shares Outstanding

		Weighted
		Average
	Number of	Grant Date		Aggregate
	Shares	Fair Value		Fair Value
	(in thousands)	(per share)		(in millions)
Balance at January 1, 2017	8,356	$	5.20	$	28
Restricted stock granted	6,461	$	3.33	$	14
Restricted stock vested	(3,230)	$	5.31	$	7
Restricted stock forfeited	(150)	$	4.72
Balance at March 31, 2017	11,437	$	4.12	$	24