Stock Split (Details) - shares	Dec. 31, 2014	Dec. 05, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 17, 2014
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)			287,737,516	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)	295,200,000				147,600,000