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Accounting Policies - Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Rights-of-way assets | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life (years)	8 years
Rights-of-way assets | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life (years)	35 years
Marketing contract
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life (years)	20 years	20 years

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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