Stock Plans (LTIP Target Performance Shares) (Details) - Performance Shares [Member] - shares			2 Months Ended	12 Months Ended
	Feb. 11, 2016	Feb. 25, 2015	Feb. 17, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at beginning of period (in shares)			1,749,000	2,525,000	2,682,000	1,749,000
Shares granted (in shares)	1,669,000	665,000	1,028,000	1,669,000	738,000	1,037,000
Shares vested (in shares)				(887,000)	(743,000)
Shares forfeited (in shares)				(448,000)	(152,000)	(104,000)
Balance at end of period (in shares)				2,859,000	2,525,000	2,682,000