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Debt and Other Obligations Extinguishment of Debt (Details) $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($)
Extinguishment of Debt [Line Items]
Extinguishment of Debt, Amount	$ 1,200
Repayments of Other Long-Term Debt	1,200	[1]
Gains (losses) on retirement of long-term obligations	0
Securitized Debt [Member] | 2015 Tower Revenue Notes 3.663% due 2045 [Member]
Extinguishment of Debt [Line Items]
Extinguishment of Debt, Amount	700
Repayments of Other Long-Term Debt	700	[1]
Gains (losses) on retirement of long-term obligations	0
Securitized Debt [Member] | June 2020 Senior Unsecured 1.350% Notes [Domain]
Extinguishment of Debt [Line Items]
Extinguishment of Debt, Amount	500
Repayments of Other Long-Term Debt	500	[1]
Gains (losses) on retirement of long-term obligations	$ 0
[1] Exclusive of accrued interest.

X

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481303/470-50-40-2

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481303/470-50-40-4

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- Definition

Amount of cash outflow for the payment of debt classified as other, maturing after one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 15
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-15

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