XML 135 R98.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Supplemental Financial Information (Noncash Investing and Financing Activities) (Details) - USD ($)
1 Months Ended 12 Months Ended
Oct. 31, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Supplemental Financial Information [Line Items]        
Capital Costs Incurred But Not Yet Paid   $ 1,900,000,000 $ 2,100,000,000 $ 1,200,000,000
Dividends payable   $ 956,000,000 $ 860,000,000 $ 732,000,000
Dividends payable (in dollars per share)   $ 0.21 $ 0.19 $ 0.1575
NBCUniversal Media LLC [Member]        
Supplemental Financial Information [Line Items]        
Capital Costs Incurred But Not Yet Paid   $ 866,000,000 $ 1,400,000,000 $ 325,000,000
Universal Beijing Resort [Member]        
Supplemental Financial Information [Line Items]        
Assets contributed to variable interest entity     391,000,000  
Universal Beijing Resort [Member] | NBCUniversal Media LLC [Member]        
Supplemental Financial Information [Line Items]        
Assets contributed to variable interest entity     $ 391,000,000  
Comcast and NBCUniversal Senior Notes [Member] | Senior Notes Exchange [Member] | Senior Notes [Member]        
Supplemental Financial Information [Line Items]        
Aggregate principal amount issued       5,500,000,000
Aggregate principal amount of certain series of outstanding notes       $ 3,900,000,000
Comcast and NBCUniversal Senior Notes [Member] | Senior Notes Exchange [Member] | Senior Notes [Member] | NBCUniversal Media LLC [Member]        
Supplemental Financial Information [Line Items]        
Aggregate principal amount of certain series of outstanding notes $ 3,900,000,000