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Goodwill And Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary Of Changes In Carrying Amount Of Goodwill, By Segment
The following table sets forth the changes in the carrying amounts of goodwill for the Communications segment:
20242023
Balance at
Jan. 1		ImpairmentBalance at
Dec. 31		Balance at
Jan. 1		Dispositions
and other 		Balance at
Dec. 31
Communications
Goodwill$91,840 $— $91,840 $91,881 $(41)$91,840 
Accumulated Impairments(23,986)(4,422)(28,408)(23,986)— (23,986)
Total$67,854 $(4,422)$63,432 $67,895 $(41)$67,854 
Schedule of Amortized Intangible Assets
Our other intangible assets at December 31 are summarized as follows:
20242023
Other Intangible Assets
Weighted-Average
Life
Gross
Carrying
Amount
Accumulated
Amortization		Currency
Translation
Adjustment
Gross
Carrying
Amount
Accumulated
Amortization		Currency
Translation
Adjustment
Amortized intangible
assets:
Wireless licenses
21.6 years$2,999 $696 $(343)$3,034 $572 $23 
Customer lists and
   relationships
10.0 years349 275 (74)379 286 (74)
Trademarks, trade names
   and other
12.6 years43 23 (6)289 261 (5)
Total21.6 years$3,391 $994 $(423)$3,702 $1,119 $(56)
Schedule of Indefinite-Life Intangible Assets Not Subject to Amortization
Indefinite-lived intangible assets not subject to amortization:
Wireless licenses$125,075 $124,734 
Trade names5,241 5,241 
Total$130,316 $129,975