Amount, after tax, of accumulated gain (loss) on derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Long-term Debt - EGTS - AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Interest expense	$ 2,216	$ 2,118	$ 2,021
EGTS
Debt Instrument [Line Items]
Interest expense	69	78	$ 89
Interest rate contracts \| EGTS
Debt Instrument [Line Items]
AOCI After-Tax	(30)
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax	$ (2)
Maximum Term	264 months
Interest rate contracts \| EGTS \| Reclassification out of Accumulated Other Comprehensive Income \| Cash flow hedge
Debt Instrument [Line Items]
Interest expense	$ 2	$ 1