Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details)

v3.10.0.1
Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Expense (Benefit) [Abstract]      
Current Federal $ (126.0) $ (61.0) $ (40.0)
Current State and Local (35.0) (23.0) (12.0)
Current Foreign (84.0) (88.0) (73.0)
Current Income Tax Expense (Benefit) (245.0) (172.0) (125.0)
Deferred Federal 131.0 1,252.0 (186.0)
Deferred State and Local 57.0 (95.0) (9.0)
Deferred Foreign (3.0)   4.0
Deferred Income Tax Expense (Benefit) 185.0 1,157.0 (191.0)
Income tax benefit (expense) (60.0) 985.0 (316.0)
Domestic 683.0 841.0 923.0
Foreign 200.0 209.0 168.0
Earnings (loss) from continuing operations before income taxes $ 883.0 $ 1,050.0 $ 1,091.0
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]      
Transition tax payment period 8 years    
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 35.00% 35.00%
Computed expected tax benefit (expense) $ (186.0) $ (367.0) $ (382.0)
State and local income taxes, net of federal income taxes (13.0) (16.0) (11.0)
Foreign taxes, net of foreign tax credits (5.0) (32.0) (9.0)
Dividends received deductions   10.0 9.0
Alternative energy tax credits 92.0 85.0 94.0
Change in valuation allowance affecting tax expense 9.0 (100.0) (16.0)
Change in tax rate - U.S. tax reform   1,317.0  
Impact of change in state rate on deferred taxes 61.0 (71.0) 1.0
Consolidation of equity investment   138.0  
Other, net (18.0) 21.0 (2.0)
Components of Deferred Tax Assets and Liabilities [Abstract]      
Tax losses and capital loss carryforwards 177.0 160.0  
Foreign tax credit carryforwards 121.0 98.0  
Accrued stock compensation 30.0 51.0  
Other accrued liabilities 65.0 19.0  
Other future deductible amounts 110.0 190.0  
Deferred tax assets 503.0 518.0  
Valuation allowance (154.0) (165.0)  
Net deferred tax assets 349.0 353.0  
Investments 55.0 600.0  
Intangible assets 1,123.0 1,188.0  
Discount on exchangeable debentures 1,067.0 981.0  
Deferred gain on debt retirements   43.0  
Other 29.0 41.0  
Deferred tax liabilities 2,274.0 2,853.0  
Deferred tax liabilities 1,925.0 2,500.0  
Valuation Allowance, Deferred Tax Asset, Change in Amount (11.0)    
Change in allowance of deferred tax asset affecting tax expense 9.0    
Change in allowance of deferred tax asset affecting equity 2.0    
Operating Loss Carryforwards, Valuation Allowance 107.0    
Foreign tax credit carryforward valuation allowance 47.0    
Income Tax Uncertainties [Abstract]      
Balance at beginning of year 71.0 72.0 104.0
Additions based on tax positions related to the current year 9.0 10.0 16.0
Additions for tax positions of prior years 2.0 4.0  
Reductions for tax positions of prior years     (26.0)
Lapse of statute and settlements (12.0) (15.0) (22.0)
Balance at end of year 70.0 71.0 72.0
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 56.0 60.0 50.0
Reasonably possible change in unrecognized tax benefit within 12 months 0.6    
Accrued interest and penalties related to uncertain tax positions $ 20.0 $ 17.0 $ 17.0