Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2015

Equity [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Income Loss

Changes in accumulated other comprehensive income (loss) by component for the three and six months ended June 30, 2015 were as follows (in millions):

	Cash Flow Hedges			Foreign Currency Items			Total
For the Three Months Ended June 30, 2015
Beginning balance, net of tax	$	77.9		($	7.1	)	$	70.8
Other comprehensive income (loss) before reclassifications:
Change in fair value of derivatives		(18.8	)		—			(18.8	)
Foreign currency translations		—			1.3			1.3
Income tax effect		6.9			—			6.9
Net of tax		(11.9	)		1.3			(10.6	)
Amounts reclassified from accumulated other comprehensive income:
Operating revenue: oil/gas production		30.4			—			30.4
Income tax effect		(10.9	)		—			(10.9	)
Net of tax		19.5			—			19.5
Other comprehensive income (loss), net of tax		(31.4	)		1.3			(30.1	)
Ending balance, net of tax	$	46.5		($	5.8	)	$	40.7

	Cash Flow Hedges			Foreign Currency Items			Total
For the Six Months Ended June 30, 2015
Beginning balance, net of tax	$	86.8		($	3.5	)	$	83.3
Other comprehensive income (loss) before reclassifications:
Change in fair value of derivatives		4.1			—			4.1
Foreign currency translations		—			(2.3	)		(2.3	)
Income tax effect		(1.3	)		—			(1.3	)
Net of tax		2.8			(2.3	)		0.5
Amounts reclassified from accumulated other comprehensive income:
Operating revenue: oil/gas production		67.2			—			67.2
Income tax effect		(24.1	)		—			(24.1	)
Net of tax		43.1			—			43.1
Other comprehensive income (loss), net of tax		(40.3	)		(2.3	)		(42.6	)
Ending balance, net of tax	$	46.5		($	5.8	)	$	40.7

Changes in accumulated other comprehensive income (loss) by component for the three and six months ended June 30, 2014, were as follows (in millions):

	Cash Flow Hedges			Foreign Currency Items			Total
For the Three Months Ended June 30, 2014
Beginning balance, net of tax	($	8.0	)	($	1.2	)	($	9.2	)
Other comprehensive income (loss) before reclassifications:
Change in fair value of derivatives		(26.0	)		—			(26.0	)
Foreign currency translations		—			0.8			0.8
Income tax effect		9.4			—			9.4
Net of tax		(16.6	)		0.8			(15.8	)
Amounts reclassified from accumulated other comprehensive income:
Operating revenue: oil/gas production		(9.2	)		—			(9.2	)
Derivative expense, net		(1.5	)		—			(1.5	)
Income tax effect		3.9			—			3.9
Net of tax		(6.8	)		—			(6.8	)
Other comprehensive income (loss), net of tax		(9.8	)		0.8			(9.0	)
Ending balance, net of tax	($	17.8	)	($	0.4	)	($	18.2	)

	Cash Flow Hedges			Foreign Currency Items			Total
For the Six Months Ended June 30, 2014
Beginning balance, net of tax	($	1.4	)	($	0.7	)	($	2.1	)
Other comprehensive income (loss) before reclassifications:
Change in fair value of derivatives		(43.4	)		—			(43.4	)
Foreign currency translations		—			0.3			0.3
Income tax effect		15.7			—			15.7
Net of tax		(27.7	)		0.3			(27.4	)
Amounts reclassified from accumulated other comprehensive income:
Operating revenue: oil/gas production		(16.3	)		—			(16.3	)
Derivative expense, net		(1.5	)		—			(1.5	)
Income tax effect		6.5			—			6.5
Net of tax		(11.3	)		—			(11.3	)
Other comprehensive income (loss), net of tax		(16.4	)		0.3			(16.1	)
Ending balance, net of tax	($	17.8	)	($	0.4	)	($	18.2	)