Acquisitions and Divestitures - TracFone Wireless, Inc. (Details) - USD ($) $ in Millions		1 Months Ended			12 Months Ended
	Nov. 23, 2021	Jan. 31, 2023	May 31, 2022	Nov. 30, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Business acquisition, purchase price in cash					$ (248)	$ 4,065	$ 520
TracFone Wireless, Inc.
Business Acquisition [Line Items]
Business acquisition, purchase price in cash	$ 3,491
Number of shares issuable (in shares)	57,596,544			57,600,000
Common stock value consideration to acquire business	$ 2,981
Future cash consideration related to achievement of certain performance measures	650
Fair value of contingent consideration	$ 560
Contingent consideration, earnout period	2 years
Cash acquired			$ 248
Contingent consideration payment					188
Measurement period adjustment, other intangible assets	$ (19)				$ 110
Other intangible assets	4,374
Contingent liability	672
Indemnification assets	672
TracFone Wireless, Inc. | Subsequent event
Business Acquisition [Line Items]
Contingent consideration payment		$ 102
TracFone Wireless, Inc. | Adjusted Fair Value
Business Acquisition [Line Items]
Business acquisition, purchase price in cash	3,498
Common stock value consideration to acquire business	2,981
Other intangible assets	4,355
TracFone Wireless, Inc. | Customer Relationships
Business Acquisition [Line Items]
Other intangible assets	$ 2,400
Weighted-average amortization period	7 years
TracFone Wireless, Inc. | Distribution Relationships
Business Acquisition [Line Items]
Other intangible assets	$ 1,100
Weighted-average amortization period	5 years
TracFone Wireless, Inc. | Trade Names
Business Acquisition [Line Items]
Other intangible assets	$ 740
Weighted-average amortization period	17 years
TracFone Wireless, Inc. | Acquired Technology
Business Acquisition [Line Items]
Other intangible assets	$ 145
Weighted-average amortization period	10 years