Retirement Plans and Postretirement Benefits (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Amounts included in the Statement of Income:
Income from continuing operations	$ 483,529,000	$ 399,792,000	$ 1,089,766,000	$ 721,088,000
Income from discontinued operations	14,901,000	11,664,000	31,804,000	24,173,000
Total	498,430,000	411,456,000	1,121,570,000	745,261,000
Pension [Member]
Components of net periodic benefit cost:
Service cost	23,247,000	23,238,000	47,772,000	46,639,000
Interest cost	28,437,000	27,161,000	59,601,000	54,703,000
Expected return on plan assets	(38,691,000)	(37,003,000)	(80,540,000)	(74,378,000)
Amortization of actuarial loss	9,729,000	6,454,000	20,052,000	12,968,000
Amortization of prior service cost	195,000	183,000	405,000	367,000
Amortization of net transition amount		7,000		15,000
Net periodic benefit cost	22,917,000	20,040,000	47,290,000	40,314,000
Amounts included in the Statement of Income:
Income from continuing operations	22,078,000	19,242,000	45,524,000	38,707,000
Income from discontinued operations	839,000	798,000	1,766,000	1,607,000
Total	22,917,000	20,040,000	47,290,000	40,314,000
Retirement Plans and Postretirement Benefits (Textuals) [Abstract]
Expected fiscal year Company contributions to pension plans and other postretirement plans	129,100,000		129,100,000
Actual year-to-date Company contributions to pension plans and other postretirement plans			44,000,000
Other Postretirement Benefits [Member]
Components of net periodic benefit cost:
Service cost	3,358,000	3,485,000	6,715,000	6,970,000
Interest cost	7,383,000	7,498,000	14,766,000	14,997,000
Expected return on plan assets	(5,141,000)	(4,545,000)	(10,282,000)	(9,091,000)
Amortization of actuarial loss	104,000	10,000	208,000	20,000
Amortization of prior service cost	1,612,000	1,612,000	3,224,000	3,223,000
Net periodic benefit cost	7,316,000	8,060,000	14,631,000	16,119,000
Amounts included in the Statement of Income:
Income from continuing operations	7,230,000	7,960,000	14,459,000	15,919,000
Income from discontinued operations	86,000	100,000	172,000	200,000
Total	7,316,000	8,060,000	14,631,000	16,119,000
Retirement Plans and Postretirement Benefits (Textuals) [Abstract]
Expected fiscal year Company contributions to pension plans and other postretirement plans	39,500,000		39,500,000
Actual year-to-date Company contributions to pension plans and other postretirement plans			$ 16,300,000