Pension and Other Post Retirement Plans (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
U.S. qualified pension plan [Member]
Components of net periodic benefit cost (income):
Interest cost	$ 42.9	$ 42.5
Special Termination Benefits	4.1
Other changes recognized in OCI:
Total income recognized in OCI	(89.7)	(221.5)
Total recognized in net periodic benefit cost and OCI	89.7	221.5
Total recognized in net periodic benefit cost and OCI
Discount rate	4.89%	4.69%
U.S. qualified pension plan [Member] | Annual Expense [Member]
Components of net periodic benefit cost (income):
Interest cost	42.9	42.5	41.9
Expected return on plan assets	(80.0)	(71.6)	(63.8)
Amortization of net (gain)	11.8	5.7	0
Special Termination Benefits	(4.1)
Net periodic benefit cost	(29.4)	(23.4)	(21.9)
Other changes recognized in OCI:
Total income recognized in OCI	(131.8)	72.0	73.3
Total recognized in net periodic benefit cost and OCI	(161.2)	48.6	51.4
Total recognized in net periodic benefit cost and OCI
Discount rate	4.01%	4.69%	5.67%
Expected return on plan assets	7.00%	7.00%	7.00%
U.K. pension plan [Member]
Components of net periodic benefit cost (income):
Service cost	7.2	7.4
Interest cost	3.2	2.8
Other changes recognized in OCI:
Total income recognized in OCI	4.4	8.9
Total recognized in net periodic benefit cost and OCI
Discount rate	4.75%	4.70%
Salary increases	3.25%	3.10%
U.K. pension plan [Member] | Annual Expense [Member]
Components of net periodic benefit cost (income):
Service cost	7.2	7.4	6.0
Interest cost	3.2	2.8	2.5
Expected return on plan assets	(4.6)	(3.7)	(3.3)
Amortization of net (gain)	(0.1)		(0.3)
Curtailment (gain) loss recognized	(13.1)
Net periodic benefit cost	(7.4)	6.5	4.9
Other changes recognized in OCI:
Total income recognized in OCI	4.5	(4.9)	5.9
Total recognized in net periodic benefit cost and OCI	(2.9)	1.6	10.8
Total recognized in net periodic benefit cost and OCI
Discount rate	4.70%	4.80%	5.30%
Expected return on plan assets	5.80%	5.80%	6.10%
Salary increases	3.10%	3.20%	3.55%
Postretirement Medical Plan [Member]
Components of net periodic benefit cost (income):
Service cost	2.8	3.3
Interest cost	2.1	3.5
Other changes recognized in OCI:
Total income recognized in OCI	4.2	(4.4)
Total recognized in net periodic benefit cost and OCI	(4.2)	4.4
Total recognized in net periodic benefit cost and OCI
Discount rate	3.89%	2.94%
Medical Assumptions:
Trend assumed for the year	8.05%	8.50%
Ultimate trend rate	4.50%	4.50%
Year that ultimate trend rate is reached	2030	2030
Postretirement Medical Plan [Member] | Annual Expense [Member]
Components of net periodic benefit cost (income):
Service cost	2.7	3.3	3.0
Interest cost	2.1	3.5	3.7
Amortization of net (gain)	0	1.2	0.7
Net periodic benefit cost	4.8	8.0	7.4
Other changes recognized in OCI:
Total income recognized in OCI	(8.6)	(15.9)	4.6
Total recognized in net periodic benefit cost and OCI	$ (3.8)	$ (7.9)	$ 12.0
Total recognized in net periodic benefit cost and OCI
Discount rate	2.94%	4.23%	5.33%
Medical Assumptions:
Trend assumed for the year	8.50%	8.97%	9.47%
Ultimate trend rate	4.50%	4.50%	4.50%
Year that ultimate trend rate is reached	2030	2030	2030