Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Changes in Shareholders' (Deficit) Equity (Parenthetical)

v3.8.0.1
Consolidated Statements of Changes in Shareholders' (Deficit) Equity (Parenthetical) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement Of Stockholders Equity [Abstract]      
Issuance of common shares 1.9 0.6 1.0
Repurchases of common shares 12.7 0.2 0.4
Foreign currency translation adjustment, tax $ 5.7 $ 5.2 $ (7.2)
Unrealized loss on derivatives, tax   (0.3) (0.6)
Other, tax   $ 0.1 $ (0.1)