XML 126 R113.htm IDEA: XBRL DOCUMENT v3.8.0.1
Equity and Earnings (Loss) Per Share - Narrative (Details)
shares in Millions, $ in Millions
12 Months Ended
Jun. 30, 2016
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2017
USD ($)
Mar. 31, 2014
USD ($)
Earnings Per Share [Abstract]        
Stock split conversion ratio 0.0667      
Shares authorized to be repurchased (in shares)       $ 1,000.0
Shares repurchased (in shares) | shares   2.5    
Aggregate purchase price of shares repurchased   $ 604.5    
Dollar value of shares yet to be purchased     $ 395.9