Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013		Jun. 30, 2013
Current assets:
Cash and cash equivalents	$ 90,318		$ 45,225		$ 114,971
Receivables, net	731,247		713,067		734,765
Inventories	331,422		282,391		345,885
Deferred income taxes	29,110		25,048		27,959
Commodity derivative instruments	129		1,447		9,797
Prepayments and other current assets	93,980		49,510		58,870
Total current assets	1,276,206		1,116,688		1,292,247
Investments	116,594		112,939		106,508
Property, plant and equipment	9,390,538		8,803,866		8,454,204
Less accumulated depreciation, depletion and amortization	4,011,858		3,872,487		3,709,679
Net property, plant and equipment	5,378,680		4,931,379		4,744,525
Deferred charges and other assets:
Goodwill	636,039	[1]	636,039	[1]	636,039	[1]
Other intangible assets, net	11,266		13,099		15,312
Other	249,532		251,188		297,040
Total deferred charges and other assets	896,837		900,326		948,391
Total assets	7,668,317		7,061,332		7,091,671
Current liabilities:
Short-term borrowings	0		11,500		31,600
Long-term debt due within one year	42,215		12,277		69,091
Accounts payable	424,201		404,961		411,621
Taxes payable	48,985		74,175		89,896
Dividends payable	34,388		33,737		32,745
Accrued compensation	50,024		69,661		44,159
Commodity derivative instruments	17,449		7,483		1,388
Other accrued liabilities	179,402		171,106		185,389
Total current liabilities	796,664		784,900		865,889
Long-term debt	2,144,879		1,842,286		1,937,663
Deferred credits and other liabilities:
Deferred income taxes	925,813		859,306		782,838
Other liabilities	736,519		718,938		810,639
Total deferred credits and other liabilities	1,662,332		1,578,244		1,593,477
Equity:
Preferred stocks	15,000		15,000		15,000
Common stockholders' equity:
Authorized - 500,000,000 shares, $1.00 par value. Shares issued - 194,138,654 at June 30, 2014, 189,369,450 at June 30, 2013 and 189,868,780 at December 31, 2013	194,139		189,869		189,369
Other paid-in-capital	1,186,900		1,056,996		1,040,379
Retained earnings	1,645,291		1,603,130		1,494,419
Accumulated other comprehensive loss	(37,198)		(38,205)		(56,821)
Treasury stock at cost - 538,921 shares	(3,626)		(3,626)		(3,626)
Total common stockholders' equity	2,985,506		2,808,164		2,663,720
Total stockholders' equity	3,000,506		2,823,164		2,678,720
Noncontrolling interest	63,936		32,738		15,922
Total equity	3,064,442		2,855,902		2,694,642
Total liabilities and equity	$ 7,668,317		$ 7,061,332		$ 7,091,671

[1] Balance is presented net of accumulated impairment of $12.3 million at the pipeline and energy services segment, which occurred in prior periods.