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Income Taxes ITD Dispute (Details) $ in Millions, ₨ in Billions	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2023 INR (₨)	Apr. 30, 2018 INR (₨)	Mar. 31, 2018 INR (₨)
One-time Transaction [Table] [Line Items]
Income Tax Expense (Benefit)	$ 713	$ 668	$ 730
Deposits Assets	403	60
Restricted Cash Equivalents		96
Long-term investments [Member]
One-time Transaction [Table] [Line Items]
Restricted Investments	0	355
Foreign Tax Jurisdiction | Ministry of Finance, India [Member] | 2016 India Cash Remittance [Member]
One-time Transaction [Table] [Line Items]
Foreign Earnings Repatriated				$ 2,800
Income Tax Expense (Benefit)				$ 135
Income Tax, Disputed Amount	$ 386							₨ 33
Deposits Assets | ₨							₨ 5
Deposits Assets, Percent Disputed Tax Amount							15.00%
Restricted Investments		355
Restricted Cash Equivalents		96
Foreign Tax Jurisdiction | Ministry of Finance, India [Member] | 2016 India Cash Remittance [Member] | Long-term investments [Member]
One-time Transaction [Table] [Line Items]
Restricted Investments		$ 355				₨ 30
Foreign Tax Jurisdiction | Ministry of Finance, India [Member] | 2013 India Share Repurchase [Member]
One-time Transaction [Table] [Line Items]
Foreign Earnings Repatriated					$ 523

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