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Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income tax reconciliation:
Income (loss) before income taxes	$ (1,573.1)	$ (46.7)	$ 65.9
Less: Net income attributable to noncontrolling interest	(228.9)	(250.4)	(58.8)
Income attributable to TRC before income taxes	$ (1,802.0)	$ (297.1)	$ 7.1
Federal statutory income tax rate	21.00%	21.00%	21.00%	35.00%
Provision for federal income taxes	$ (378.4)	$ (62.4)	$ 1.5
Valuation allowance	194.2	0.0	0.0
State income taxes, net of federal tax benefit	(51.2)	(5.8)	2.5
State rate re-measurement	0.0	(14.4)	0.0
CARES Act NOL carryback	(16.9)	0.0	0.0
Permanent adjustments	4.5	(6.3)	0.0
Other, net	(0.3)	1.0	1.5
Total income tax expense (benefit)	$ (248.1)	$ (87.9)	$ 5.5

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