Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2015

Equity [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Income Loss

Changes in accumulated other comprehensive income (loss) by component for the three months ended March 31, 2015 and 2014 were as follows (in millions):

	Cash Flow Hedges			Foreign Currency Items			Total
For the Three Months Ended March 31, 2015
Beginning balance, net of tax	$	86.8		($	3.5	)	$	83.3
Other comprehensive income (loss) before reclassifications:
Change in fair value of derivatives		22.9			—			22.9
Foreign currency translations		—			(3.6	)		(3.6	)
Income tax effect		(8.2	)		—			(8.2	)
Net of tax		14.7			(3.6	)		11.1
Amounts reclassified from accumulated other comprehensive income:
Operating revenue: oil/gas production		36.8			—			36.8
Income tax effect		(13.2	)		—			(13.2	)
Net of tax		23.6			—			23.6
Other comprehensive income (loss), net of tax		(8.9	)		(3.6	)		(12.5	)
Ending balance, net of tax	$	77.9		($	7.1	)	$	70.8
	Cash Flow Hedges			Foreign Currency Items			Total
For the Three Months Ended March 31, 2014
Beginning balance, net of tax	($	1.4	)	($	0.7	)	($	2.1	)
Other comprehensive income (loss) before reclassifications:
Change in fair value of derivatives		(17.4	)		—			(17.4	)
Foreign currency translations		—			(0.5	)		(0.5	)
Income tax effect		6.3			—			6.3
Net of tax		(11.1	)		(0.5	)		(11.6	)
Amounts reclassified from accumulated other comprehensive income:
Operating revenue: oil/gas production		(7.1	)		—			(7.1	)
Income tax effect		2.6			—			2.6
Net of tax		(4.5	)		—			(4.5	)
Other comprehensive income (loss), net of tax		(6.6	)		(0.5	)		(7.1	)
Ending balance, net of tax	($	8.0	)	($	1.2	)	($	9.2	)