Retirement Benefit Plans (Details 3) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Change in plan assets:
Fair value of plan assets at beginning of year	$ 3,290.6
Actual return on plan assets	182.4
Employee contributions	0.2
Company contributions / payments	17.7
International plan exchange rate change	(6.8)
Benefits paid	(179.3)
Spinoff of Steel Change in Plan Assets	(1,197.4)
Fair value of plan assets at end of year	2,107.4
Funded status at end of year	120.5
Pension Plan, Defined Benefit [Member]
Change in plan assets:
Fair value of plan assets at beginning of year	2,870.0
Actual return on plan assets	163.2
Employee contributions	0
Company contributions / payments	3.4
International plan exchange rate change	0
Benefits paid	(162.5)
Spinoff of Steel Change in Plan Assets	(1,111.7)
Fair value of plan assets at end of year	1,762.4
Funded status at end of year	161.1
Foreign Pension Plan, Defined Benefit [Member]
Change in plan assets:
Fair value of plan assets at beginning of year	420.6
Actual return on plan assets	19.2
Employee contributions	0.2
Company contributions / payments	14.3
International plan exchange rate change	(6.8)
Benefits paid	(16.8)
Spinoff of Steel Change in Plan Assets	(85.7)
Fair value of plan assets at end of year	345.0
Funded status at end of year	$ (40.6)