Condensed Consolidated Statement of Changes in Stockholders' Equity - 9 months ended Aug. 31, 2016 - USD ($)
shares in Millions, $ in Millions
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Loss [Member]
Employee Stock Option [Member]
Employee Stock Option [Member]
Common Stock [Member]
Employee Stock Option [Member]
Additional Paid-in Capital [Member]
Employee Stock Option [Member]
Treasury Stock [Member]
Employee Stock Option [Member]
Retained Earnings [Member]
Employee Stock Option [Member]
Accumulated Other Comprehensive Loss [Member]
Balance, shares at Nov. 30, 2015 240.2 240.2                    
Balance (Audited) at Nov. 30, 2015 $ 2,200.9 $ 2.5 $ 1,051.3 $ (317.0) $ 1,655.3 $ (191.2)            
Share-based award activity, shares   2.4           3.2        
Share-based award activity, value 110.3 $ 0.0 139.8 (29.5) 0.0 0.0 $ 69.1 $ 0.0 $ 69.1 $ 0.0 $ 0.0 $ 0.0
Income tax deficit from stock-based compensation (0.4) $ 0.0 (0.4) 0.0 0.0 0.0            
Repurchases of common stock, shares   6.7                    
Repurchases of common stock, value (230.6) $ 0.0 0.0 (230.6) 0.0 0.0            
Common shares issued in connection with the Merger, shares   182.8                    
Common shares issued in connection with the Merger, value 6,247.4 $ 2.0 6,245.4 0.0 0.0 0.0            
Cancellation of treasury shares, shares   0.0                    
Cancellation of treasury shares, value 0.0 $ 0.0 (420.2) 420.2 0.0 0.0            
Net income (loss) attributable to IHS Markit Ltd. 63.5 0.0 0.0 0.0 63.5 0.0            
Other comprehensive income (loss) $ (27.6) $ 0.0 0.0 0.0 0.0 (27.6)            
Balance, shares at Aug. 31, 2016 421.9 421.9                    
Balance at Aug. 31, 2016 $ 8,432.6 $ 4.5 $ 7,085.0 $ (156.9) $ 1,718.8 $ (218.8)