XML 52 R41.htm IDEA: XBRL DOCUMENT v3.20.2
Deferred Contract Costs - (Narratives) (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]        
Amortization of contract costs $ 55,000,000 $ 44,000,000 $ 107,000,000 $ 87,000,000
Deferred contract costs impairment $ 0 $ 0 $ 0 $ 0