Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Identifiable Intangible Assets

	December 31, 2019				December 31, 2018
(In millions)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Definite-lived intangibles
Customer relationships	$	1,875	$	784	$	1,891	$	640
Trade name	51		51		52		52
Non-compete agreements	16		15		16		14
	$	1,942	$	850	$	1,959	$	706

Estimated Future Amortization Expense for Amortizable Intangible Assets

Estimated future amortization expense for amortizable intangible assets for the next five years is as follows:

(In millions)	2020		2021		2022		2023		2024		Thereafter
Estimated amortization expense	$	145	$	137	$	127	$	110	$	106	$	467