XML 23 R6.htm IDEA: XBRL DOCUMENT v3.19.2
CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical)
$ in Millions
Jun. 30, 2019
USD ($)
shares
Jun. 30, 2019
£ / shares
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2018
£ / shares
Statement of Financial Position [Abstract]        
Accounts and other receivables, allowances | $ $ 1.6   $ 2.4  
Ordinary shares        
Common stock, par value (in GBP per share) | £ / shares   £ 0.50   £ 0.50
Common stock, shares authorized (in shares) 40,000,000   40,000,000  
Common stock, shares issued (in shares) 29,000,000   27,136,799  
Common stock, shares outstanding (in shares) 29,000,000   27,136,799  
Deferred shares        
Common stock, par value (in GBP per share) | £ / shares   £ 0.0001   £ 0.0001
Common stock, shares authorized (in shares) 761,845,318,444   769,423,688,000  
Common stock, shares issued (in shares) 761,835,338,444   769,413,708,000  
Common stock, shares outstanding (in shares) 761,835,338,444   769,413,708,000