Stock Plans (LTIP Target Performance Shares) (Details) - Performance Shares [Member] - shares		2 Months Ended	12 Months Ended
	Feb. 25, 2015	Feb. 17, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at beginning of period (in shares)		1,749,000	2,682,000	1,749,000	979,000
Shares granted (in shares)	665,000	1,028,000	738,000	1,037,000	1,124,000	979,000
Shares vested (in shares)			(743,000)
Shares forfeited (in shares)			(152,000)	(104,000)	(354,000)
Balance at end of period (in shares)			2,525,000	2,682,000	1,749,000	979,000