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Investments and Acquisitions
 3 Months Ended
Mar. 31, 2019
Schedule of Investments [Line Items]  
Investments and Acquisitions
INVESTMENTS AND ACQUISITIONS
Unconsolidated Equity Investments - Alliant Energy’s equity (income) loss from unconsolidated investments accounted for under the equity method of accounting for the three months ended March 31 was as follows (in millions):
 
2019
 
2018
ATC Holdings

($9.5
)
 

($8.7
)
Non-utility wind farm in Oklahoma
(1.1
)
 
(12.1
)
Other
(0.3
)
 
(0.5
)
 

($10.9
)
 

($21.3
)


Non-utility Transportation Acquisitions - In the first quarter of 2019, Alliant Energy, through its wholly-owned non-utility subsidiaries, completed acquisitions of freight management companies located in Cedar Rapids, Iowa and Stoughton, Wisconsin. These acquisitions were purchased for $21 million, including contingent consideration of $8 million, which is expected to be paid within two years. The purchase price was largely allocated to intangibles and the remainder was allocated to working capital and property.