Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Financial Statement Impacts of Applying New Accounting Standard

Including the impacts from a change in the accounting conclusion on the 1,400 previously failed sale-leaseback tower sites, the cumulative effect of initially applying the new lease standard on January 1, 2019 is as follows:

	January 1, 2019
(in millions)	Beginning Balance		Cumulative Effect Adjustment		Beginning Balance, As Adjusted
Assets
Other current assets	$	1,676	$	(78)	$	1,598
Property and equipment, net	23,359		(2,339)		21,020
Operating lease right-of-use assets	—		9,251		9,251
Financing lease right-of-use assets	—		2,271		2,271
Other intangible assets, net	198		(12)		186
Other assets	1,623		(71)		1,552
Liabilities and Stockholders’ Equity
Accounts payable and accrued liabilities	7,741		(65)		7,676
Other current liabilities	787		28		815
Short-term and long-term debt	12,965		(2,015)		10,950
Tower obligations	2,557		(345)		2,212
Deferred tax liabilities	4,472		231		4,703
Deferred rent expense	2,781		(2,781)		—
Short-term and long-term operating lease liabilities	—		11,364		11,364
Short-term and long-term financing lease liabilities	—		2,016		2,016
Other long-term liabilities	967		(64)		903
Accumulated deficit	(12,954)		653		(12,301)