Intangible Assets Including Goodwill - Intangible Assets Activity (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
Intangible assets | ||||
Intangible assets, increase (decrease) | $ (1,273) | |||
Intangible asset amortization expense | $ 613 | $ 614 | 1,858 | $ 1,224 |
Retirement of fully amortized intangible assets | $ 1,258 |