Consolidated Statements of Equity (Unaudited) (Parenthetical) - $ / shares		3 Months Ended		6 Months Ended
	Dec. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share and common unit (in dollars per share)	$ 1.90	$ 0.425	$ 0.375000	$ 0.8	$ 0.725