Income Taxes - Additional Information (Details) $ in Millions	6 Months Ended
Jun. 30, 2022 USD ($)
Income Tax Disclosure [Abstract]
Tax-effected valuation allowance	$ 130.8
Increase (decrease) in valuation allowance	(79.8)
Net deferred tax liability	$ 213.4
Income tax examination, description	On October 6, 2021 and April 7, 2022, we received notice from the IRS that it intends to audit three direct and indirectly wholly-owned subsidiaries of the Company (Targa Resources Partners LP, Targa Downstream LLC and Targa Midstream Services LLC) treated as partnerships for federal tax purposes for the 2019 and 2020 tax years.
Tax examination, year under examination	2019 2020

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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-Name Accounting Standards Codification
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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.

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A brief description of status of the tax examination, significant findings to date, and the entity's position with respect to the findings.

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Tax year being audited in the income tax examination, in YYYY format.

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Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

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