Stock Split (Details) - shares	Dec. 31, 2014	Dec. 05, 2014	Dec. 31, 2015
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)	295,247,958		291,338,011
Common Stocks
Class of Stock [Line Items]
Common stock split conversion ratio	2	2
Common stock split, stock dividend percent	100.00%	100.00%
Common stock split, additional shares issued for every share held (in shares)	1
Common stock, shares outstanding (in shares)	147,600,000		295,200,000