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Derivatives, Hedging Programs and Other Financial Instruments (Tables)
 3 Months Ended
Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Summary of material derivative positions
The following table summarizes our derivative positions at March 31, 2018:
Aluminum
Maturity Period
(month/year)
 
Notional Amount of Contracts (mmlbs)
Fixed price purchase contracts
4/18 through 12/21
 
141.0

Fixed price sales contracts
4/18 through 11/19
 
3.9

Midwest premium swap contracts1
4/18 through 12/21
 
136.7

Alloying Metals
Maturity Period
(month/year)
 
Notional Amount of Contracts (mmlbs)
Fixed price purchase contracts
4/18 through 12/18
 
6.1

Natural Gas2
Maturity Period
(month/year)
 
Notional Amount of Contracts (mmbtu)
Fixed price purchase contracts
4/18 through 12/20
 
3,520,000

Electricity3
Maturity Period
(month/year)
 
Notional Amount of Contracts (Mwh)
Fixed price purchase contracts
1/20 through 12/20
 
175,680

Euro4
Maturity Period
(month/year)
 
Notional Amount of Contracts (euro)
Fixed price purchase contracts
4/18
 
64,555

____________________
1 
Regional premiums represent the premium over the London Metal Exchange price for primary aluminum which is incurred on our purchases of primary aluminum.
2 
As of March 31, 2018, we had derivative and/or physical delivery commitments with energy companies in place to cover exposure to fluctuations in prices for approximately 72% of the expected natural gas purchases for the remainder of 2018, 70% of the expected natural gas purchases for 2019 and 69% of the expected natural gas purchases for 2020.
Summary of realized and unrealized gains and losses
The location and amount of (gain) loss included on the Statements of Consolidated Income within the Fabricated Products segment associated with all derivative contracts consisted of the following for each period presented (in millions of dollars):
 
Quarter Ended
March 31, 2018
 
Quarter Ended
March 31, 2017
 
Cost of products sold, excluding depreciation and amortization and other items1
 
Cost of products sold, excluding depreciation and amortization and other items1
 
Unrealized (gain) loss on derivative instruments
Total amounts of income and expense line items presented in the statements of consolidated income in which the effects of hedges are recorded
$
316.7

 
$
277.8

 
$
(15.1
)
 
 
 
 
 
 
(Gain) loss recognized in income related to cash flow hedges:
 
 
 
 
 
Aluminum
$
0.3

 
$
—

 
$
—

Alloy Hedges
(0.4
)
 
(0.1
)
 
—

Total gain recognized in income
$
(0.1
)
 
$
(0.1
)
 
$
—

 
 
 
 
 
 
 
 
 
 
 
 
(Gain) loss recognized in income related to non-designated hedges:
 
 
 
 
 
Aluminum
$
—

 
$
(4.6
)
 
$
(16.3
)
Natural gas
—

 
—

 
1.2

Total gain recognized in income
$
—

 
$
(4.6
)
 
$
(15.1
)

____________________
1 
Beginning with our adoption of ASU 2017-12 effective January 1, 2018, we no longer have Unrealized loss (gain) on derivative instruments on the Statements of Consolidated Income as all of our commodity hedges are designated as cash flow hedges. As such, all Unrealized loss (gain) on derivative instruments is reported in AOCI. For the quarter ended March 31, 2017, Unrealized loss (gain) on derivative instruments was reclassified to Cost of products sold, excluding depreciation and amortization and other items in the Statements of Consolidated Income to conform to the current period's presentation, for a combined total of $262.7 million. The amounts comprising both line items are presented separately here for comparative purposes.
Fair Value of Derivative Assets and Liabilities Measured on Recurring Basis
The following table presents the fair value of our derivative financial instruments as of the period presented (in millions of dollars):
 
March 31, 2018
 
December 31, 2017
 
Derivative Assets
 
Derivative Liabilities
 
Net Amount
 
Derivative Assets
 
Derivative Liabilities
 
Net Amount
Cash Flow Hedges:
 
 
 
 
 
 
 
 
 
 
 
Aluminum –
 
 
 
 
 
 
 
 
 
 
 
Fixed price purchase contracts
$
4.6

 
$
(4.4
)
 
$
0.2

 
$
—

 
$
—

 
$
—

Fixed price sales contracts
0.2

 
—

 
0.2

 
—

 
—

 
—

Midwest premium swap contracts
6.2

 
(0.1
)
 
6.1

 
—

 
—

 
—

Alloying metals – Fixed price purchase contracts
0.3

 
(0.2
)
 
0.1

 
0.9

 
—

 
0.9

Natural gas – Fixed price purchase contracts
0.1

 
(0.5
)
 
(0.4
)
 
—

 
—

 
—

Electricity – Fixed price purchase contracts
—

 
(0.3
)
 
(0.3
)
 
—

 
—

 
—

 
 
 
 
 
 
 
 
 
 
 
 
Non-Designated Hedges:
 
 
 
 
 
 
 
 
 
 
 
Aluminum –
 
 
 
 
 
 
 
 
 
 
 
Fixed price purchase contracts
—

 
—

 
—

 
22.5

 
—

 
22.5

Fixed price sales contracts
—

 
—

 
—

 
—

 
(0.1
)
 
(0.1
)
Midwest premium swap contracts
—

 
—

 
—

 
1.7

 
(0.1
)
 
1.6

Natural gas – Fixed price purchase contracts
—

 
—

 
—

 
0.2

 
(0.5
)
 
(0.3
)
Electricity – Fixed price purchase contracts
—

 
—

 
—

 
—

 
(0.1
)
 
(0.1
)
 
 
 
 
 
 
 
 
 
 
 
 
Total1
$
11.4

 
$
(5.5
)
 
$
5.9

 
$
25.3

 
$
(0.8
)
 
$
24.5

____________________
1 
All of our derivative contracts with counterparties are subject to enforceable master netting arrangements. We reflect the fair value of our derivative contracts on a gross basis on the Consolidated Balance Sheets.
The following table presents the balance sheet location of derivative assets and liabilities for the periods presented (in millions of dollars):
 
March 31, 2018
 
December 31, 2017
Assets:
 
 
 
Prepaid expenses and other current assets
$
9.0

 
$
18.9

Other assets
2.4

 
6.4

Total assets
$
11.4

 
$
25.3

 
 
 
 
Liabilities:
 
 
 
Other accrued liabilities
$
(3.1
)
 
$
(0.3
)
Long-term liabilities
(2.4
)
 
(0.5
)
Total Liabilities
$
(5.5
)
 
$
(0.8
)
Fair Value, Non-Derivative Assets Measured on Recurring Basis
The following table presents our other financial assets, classified under the appropriate level of the fair value hierarchy, as of March 31, 2018 (in millions of dollars):
 
Level 1
 
Level 2
 
Level 3
 
Total
Cash and cash equivalents
$
17.3

 
$
117.7

 
$
—

 
$
135.0

Short-term investments
—

 
83.8

 
—

 
83.8

Total
$
17.3

 
$
201.5

 
$
—

 
$
218.8

The following table presents our other financial assets, classified under the appropriate level of the fair value hierarchy, as of December 31, 2017 (in millions of dollars):
 
Level 1
 
Level 2
 
Level 3
 
Total
Cash and cash equivalents
$
23.5

 
$
27.6

 
$
—

 
$
51.1

Short-term investments
—

 
183.7

 
—

 
$
183.7

Total
$
23.5

 
$
211.3

 
$
—

 
$
234.8


All Other Financial Assets and Liabilities. We believe that the fair values of our accounts receivable, contract assets, accounts payable and accrued liabilities approximate their respective carrying values due to their short maturities and nominal credit risk.