v3.10.0.1
Quarterly Data (Unaudited) - Additional Information (Details)
 3 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
$ / shares
Mar. 31, 2018
USD ($)
$ / shares
Dec. 31, 2017
USD ($)
Dec. 31, 2018
USD ($)
$ / shares
Dec. 31, 2017
USD ($)
Quarterly Data (Unaudited)          
Net income adjustment due to the resolution of litigation   $ 710,000,000      
Impact on diluted earnings per share related to litigation settlement action | $ / shares   1.16      
Net income adjustment for measurement period from accounting pursuant to Tax Cuts and Jobs Act of 2017   $ 217,000,000 $ 762,000,000    
Impact on diluted earnings per share as a result of the Tax Cuts And Jobs Act Of 2017   0.36 1.25   1.24
Net income adjustment due to the Company’s ongoing IRS examination under the Compliance Assurance Process (CAP) and new guidance released under the Tax Cuts and Jobs Act $ 60,000,000        
Impact on diluted earnings per share due to the Company’s ongoing IRS examination under the Compliance Assurance Process (CAP) and new guidance released under the Tax Cuts and Jobs Act | $ / shares 0.11        
Net income adjustment due to completing the Tax Cuts and Jobs Act of 2017 accounting $ 41,000,000        
Impact on diluted earnings per share due to completing the Tax Cuts and Jobs Act of 2017 accounting | $ / shares 0.07        
Aggregate net income adjustments due the quarterly adjustments       $ 946,000,000  
Impact on diluted earnings per share in aggregate of quarterly adjustments | $ / shares       1.57