CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balance at Dec. 31, 2013	$ 8,808,265	$ 2,308	$ 3,159,038	$ 6,054,952	$ 5,671	$ (413,704)
Increase (Decrease) in Stockholders' Equity
Issuance under employee related plans	94,537	23	94,514
Common Stock dividends	(243,550)			(243,550)
Dividends declared by non-controlling interest	(300)			(300)
Changes related to cash flow derivative hedges	(869,350)				(869,350)
Change in defined benefit plans	(7,213)				(7,213)
Foreign currency translation adjustments	(26,102)				(26,102)
Purchases of Treasury Stock	(236,074)					(236,074)
Net income	764,146			764,146
Balance at Dec. 31, 2014	8,284,359	2,331	3,253,552	6,575,248	(896,994)	(649,778)
Increase (Decrease) in Stockholders' Equity
Issuance under employee related plans	40,505	8	40,497
Common Stock dividends	(296,169)			(296,169)
Changes related to cash flow derivative hedges	(406,047)				(406,047)
Change in defined benefit plans	4,760				4,760
Foreign currency translation adjustments	(30,152)				(30,152)
Purchases of Treasury Stock	(200,000)		3,570			(203,570)
Net income	665,783			665,783
Balance at Dec. 31, 2015	8,063,039	2,339	3,297,619	6,944,862	(1,328,433)	(853,348)
Increase (Decrease) in Stockholders' Equity
Issuance under employee related plans	30,905	7	30,898
Common Stock dividends	(367,909)			(367,909)
Changes related to cash flow derivative hedges	411,223				411,223
Change in defined benefit plans	(1,636)				(1,636)
Foreign currency translation adjustments	2,362				2,362
Purchases of Treasury Stock	(299,960)					(299,960)
Net income	1,283,388			1,283,388
Balance at Dec. 31, 2016	$ 9,121,412	$ 2,346	$ 3,328,517	$ 7,860,341	$ (916,484)	$ (1,153,308)