PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Components Of Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 188.6	$ 200.5	$ 192.2
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	915.3	838.7	744.1
Service cost	38.9	32.0	23.6
Interest cost	45.9	48.4	51.4
Expected return on plan assets	(65.6)	(59.5)	(61.2)
Amortization:
Net asset	0	0	0
Prior service costs (credits)	(3.0)	(3.9)	(4.4)
Net actuarial loss	29.9	30.4	19.6
Net periodic benefit cost	52.1	55.2	37.8
Acquired through business combinations	0	0	0
Current year actuarial (gain)/loss	(168.8)	53.1	165.3
Amortization of net loss	29.9	30.4	19.6
Current year prior service cost	0.8	2.8	0
Amortization of prior service (cost) credit	(3.0)	(3.9)	(4.4)
Amortization of transition asset	0	0	0
Total recognized in other comprehensive income	(200.9)	21.6	141.3
Total recognized in net periodic cost and other comprehensive income	(148.8)	76.8	179.1
Defined Benefit Plan, Benefit Obligation	(1,118.0)	(1,244.3)	(1,141.4)
Defined Benefit Plan, Funded Status of Plan	(202.7)	(405.6)
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	251.8	237.0	193.5
Service cost	12.3	14.7	11.1
Interest cost	17.3	20.6	22.3
Expected return on plan assets	(20.1)	(17.7)	(16.1)
Amortization:
Net asset	0	(3.0)	(3.0)
Prior service costs (credits)	3.6	(1.9)	(3.7)
Net actuarial loss	11.5	11.6	8.8
Net periodic benefit cost	17.4	28.1	26.8
Acquired through business combinations	0	0	0
Current year actuarial (gain)/loss	(95.2)	3.2	46.8
Amortization of net loss	11.5	11.6	8.8
Current year prior service cost	0	(58.3)	0
Amortization of prior service (cost) credit	3.6	(1.9)	(3.7)
Amortization of transition asset	0	3.0	3.0
Total recognized in other comprehensive income	(103.1)	(65.6)	37.3
Total recognized in net periodic cost and other comprehensive income	(85.7)	(37.5)	64.1
Defined Benefit Plan, Benefit Obligation	(356.2)	(459.8)	(488.4)
Defined Benefit Plan, Funded Status of Plan	(104.4)	(222.8)
Salaried Employees [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	357.4	328.2
Amortization:
Defined Benefit Plan, Benefit Obligation	(427.2)	(464.4)
Defined Benefit Plan, Funded Status of Plan	(69.8)	(136.2)
Salaried Employees [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Amortization:
Defined Benefit Plan, Benefit Obligation	(53.6)	(72.6)
Defined Benefit Plan, Funded Status of Plan	(53.6)	(72.6)
Hourly Employees [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	552.7	506.4
Amortization:
Defined Benefit Plan, Benefit Obligation	(674.8)	(764.8)
Defined Benefit Plan, Funded Status of Plan	(122.1)	(258.4)
Hourly Employees [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	251.8	237.0
Amortization:
Defined Benefit Plan, Benefit Obligation	(302.6)	(387.2)
Defined Benefit Plan, Funded Status of Plan	(50.8)	(150.2)
Mining Employees [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	5.2	4.1
Amortization:
Defined Benefit Plan, Benefit Obligation	(6.8)	(6.4)
Defined Benefit Plan, Funded Status of Plan	(1.6)	(2.3)
Supplemental Executive Retirement Plan S E R P [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Amortization:
Defined Benefit Plan, Benefit Obligation	(9.2)	(8.7)
Defined Benefit Plan, Funded Status of Plan	$ (9.2)	$ (8.7)