XML 78 R66.htm IDEA: XBRL DOCUMENT v3.8.0.1
INCOME TAXES. (Net Deferred Tax Assets) (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Deferred tax liabilities    
Property and equipment $ (35.3) $ (39.2)
Net unrealized holding gains recognized in income (53.9) (43.2)
Net unrealized holding gains on investments held as available-for-sale (3.1) (33.4)
Other (18.9) (27.5)
Total deferred tax liabilities (111.2) (143.3)
Deferred tax assets    
Stock-based compensation 92.7 165.1
Asset impairments 8.8 16.1
Accrued compensation 4.4 5.6
Supplemental savings plan 66.6 58.3
Currency translation adjustment 2.2 23.0
Other 6.8 7.7
Total deferred tax assets 181.5 275.8
Net deferred tax asset $ 70.3 $ 132.5