Goodwill and Intangible Assets Schedule of Finite-Lived Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

amortization expense for the subsequent five years is estimated as follows (dollars in millions): 

Period	Amount
2020	$	184
2021	184
2022	184
2023	184
2024	177