Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Common stock, par value (dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (shares)	4,990,000,000	4,990,000,000
Common stock, shares issued (shares)	428,725,388	427,940,440
Common stock, shares outstanding (shares)	428,725,388	427,940,440