Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Loss Contingency, Damages Sought, Value		$ 36.0
Loss Contingency Accrual, at Carrying Value		16.8	$ 10.4
Accrual for Environmental Loss Contingencies		1.0	1.3
Purchase Commitment, Remaining Minimum Amount		2,493.6
Loss Contingency, Damages Paid, Value		19.5
Subsequent Event
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Loss Contingency, Damages Paid, Value	$ 0.1
Other Growth and Maintenance Contractual Purchase Obligations
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Firm Purchase Commitments		15.6
Commodity
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Firm Purchase Commitments		2,760.9
Crestwood Equity Partners LP
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Self-insurance reserves		5.5	7.7
Self-insurance reserve expected to be paid in next fiscal year		3.5
CMLP
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Self-insurance reserves		4.7	$ 6.7
Self-insurance reserve expected to be paid in next fiscal year		2.9
Maximum
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Loss Contingency, Estimate of Possible Loss		$ 1.9