Changes in Accumulated Other Comprehensive (Loss) Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Changes in accumulated other comprehensive loss by component
Accumulated comprehensive (loss) income at beginning of the year	$ (896,994)	$ 5,671
Other comprehensive (loss) income before reclassifications	(349,197)	(57,344)
Amounts reclassified from accumulated other comprehensive (loss) income	55,211	4,868
Total other comprehensive loss	(293,986)	(52,476)
Ending balance	(1,190,980)	(46,805)
Changes related to cash flow derivative hedges
Changes in accumulated other comprehensive loss by component
Accumulated comprehensive (loss) income at beginning of the year	(826,026)	43,324
Other comprehensive (loss) income before reclassifications	(315,597)	(57,352)
Amounts reclassified from accumulated other comprehensive (loss) income	54,648	4,437
Total other comprehensive loss	(260,949)	(52,915)
Ending balance	(1,086,975)	(9,591)
Changes in defined benefit plans
Changes in accumulated other comprehensive loss by component
Accumulated comprehensive (loss) income at beginning of the year	(31,207)	(23,994)
Other comprehensive (loss) income before reclassifications	(2,056)	(2,462)
Amounts reclassified from accumulated other comprehensive (loss) income	563	431
Total other comprehensive loss	(1,493)	(2,031)
Ending balance	(32,700)	(26,025)
Foreign currency translation adjustments
Changes in accumulated other comprehensive loss by component
Accumulated comprehensive (loss) income at beginning of the year	(39,761)	(13,659)
Other comprehensive (loss) income before reclassifications	(31,544)	2,470
Amounts reclassified from accumulated other comprehensive (loss) income	0	0
Total other comprehensive loss	(31,544)	2,470
Ending balance	$ (71,305)	$ (11,189)

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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