Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) $ in Millions	Sep. 30, 2016 USD ($)
Assets
Derivatives assets	$ 1.6
Liabilities
Derivative liabilities	0.1
Fair Value, Measurements, Recurring
Assets
Total assets	1.6
Liabilities
Total liabilities	0.1
Fair Value, Measurements, Recurring | Level 1
Assets
Total assets	0.0
Liabilities
Total liabilities	0.0
Fair Value, Measurements, Recurring | Level 2
Assets
Total assets	0.0
Liabilities
Total liabilities	0.1
Fair Value, Measurements, Recurring | Level 3
Assets
Total assets	1.6
Liabilities
Total liabilities	0.0
Fair Value, Measurements, Recurring | Commodity
Assets
Derivatives assets	1.6
Liabilities
Derivative liabilities	0.1
Fair Value, Measurements, Recurring | Commodity | Level 1
Assets
Derivatives assets	0.0
Liabilities
Derivative liabilities	0.0
Fair Value, Measurements, Recurring | Commodity | Level 2
Assets
Derivatives assets	0.0
Liabilities
Derivative liabilities	0.1
Fair Value, Measurements, Recurring | Commodity | Level 3
Assets
Derivatives assets	1.6
Liabilities
Derivative liabilities	$ 0.0