Additional Financial Information (Tables)

12 Months Ended

Dec. 31, 2019

Supplemental Financial Statement Elements [Abstract]

Schedule of Accounts Payable and Accrued Liabilities

Accounts payable and accrued liabilities are summarized as follows:

(in millions)	December 31, 2019		December 31, 2018
Accounts payable	$	4,322	$	5,487
Payroll and related benefits	802		709
Property and other taxes, including payroll	682		642
Interest	227		227
Commissions	251		243
Network decommissioning	—		65
Toll and interconnect	156		157
Advertising	127		76
Other	179		135
Accounts payable and accrued liabilities	$	6,746	$	7,741

Schedule of Related Party Transactions

The following table summarizes the impact of significant transactions with DT or its affiliates included in Operating expenses in the Consolidated Statements of Comprehensive Income:

	Year Ended December 31,
(in millions)	2019		2018		2017
Discount related to roaming expenses	$	(9)	$	—	$	—
Fees incurred for use of the T-Mobile brand	88		84		79
Expenses for telecommunications and IT services	—		—		12
International long distance agreement	39		36		55