Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)

v3.10.0.1
Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares
shares in Millions
Jun. 30, 2018
Dec. 31, 2017
Statement Of Financial Position [Abstract]    
Common shares, par value $ 0.0005 $ 0.0005
Common shares, shares authorized 2,000.0 2,000.0
Common shares, shares outstanding 147.1 164.7
Treasury stock shares, at cost 10.0 10.0