v3.10.0.1
Accounting Changes and Recent Accounting Pronouncements (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Jan. 01, 2018
Dec. 31, 2017
Assets:            
Trade receivables, net $ 1,323.6   $ 1,323.6   $ 1,410.3 $ 1,411.0
Current assets of discontinued operations (note 4) 425.2   425.2   366.3 268.1
Other current assets 378.0   378.0   428.5 351.9
Investments and related note receivables 6,317.8   6,317.8   6,862.6 6,671.4
Deferred tax assets 3,135.6   3,135.6   3,117.1 3,133.1
Long-term assets of discontinued operations (note 4) 10,933.8   10,933.8   11,170.2 11,141.1
Other assets, net 3,700.0   3,700.0   3,741.6 3,720.2
Liabilities:            
Deferred revenue 846.2   846.2   947.8 942.2
Current liabilities of discontinued operations (note 4) 1,873.1   1,873.1   1,614.4 1,587.7
Other accrued and current liabilities 2,583.4   2,583.4   2,241.2 2,240.0
Long-term liabilities of discontinued operations (note 4) 10,125.4   10,125.4   10,006.7 9,967.6
Other long-term liabilities 2,422.8   2,422.8   2,249.7 2,247.0
Equity:            
Accumulated deficit (6,171.4)   (6,171.4)   (5,897.5) (6,217.6)
Noncontrolling interests (366.3)   (366.3)   (407.6) $ (412.0)
Other income, net $ 6.4 $ 15.8 16.2 $ 32.4    
ASU 2014-09 | ASU 2014-09 Adjustments            
Assets:            
Trade receivables, net         (0.7)  
Current assets of discontinued operations (note 4)         98.2  
Other current assets         76.6  
Investments and related note receivables         191.2  
Deferred tax assets         (16.0)  
Long-term assets of discontinued operations (note 4)         29.1  
Other assets, net         21.4  
Liabilities:            
Deferred revenue         5.6  
Current liabilities of discontinued operations (note 4)         26.7  
Other accrued and current liabilities         1.2  
Long-term liabilities of discontinued operations (note 4)         39.1  
Other long-term liabilities         2.7  
Equity:            
Accumulated deficit         320.1  
Noncontrolling interests         $ 4.4  
ASU 2017-07            
Equity:            
Other income, net     $ 9.2