Defined Benefit Plans (Asset Allocation and Target Mix) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,057.0	$ 310.9
Target asset mix	100.00%
Total [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,057.0
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	880.5
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15.3
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	161.2	0
Debt securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset mix	26.10%
Debt securities [Member] | Total [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	275.5
Debt securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	275.5
Debt securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Debt securities [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Insurance contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset mix	14.50%
Insurance contract [Member] | Total [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	153.4
Insurance contract [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Insurance contract [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Insurance contract [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	153.4
Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset mix	12.60%
Hedge funds [Member] | Total [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	133.1
Hedge funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	117.8
Hedge funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15.3
Hedge funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset mix	32.60%
Equity securities [Member] | Total [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	344.3
Equity securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	344.3
Equity securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Equity securities [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Guarantee investment contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset mix	7.90%
Guarantee investment contracts [Member] | Total [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	83.0
Guarantee investment contracts [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	83.0
Guarantee investment contracts [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Guarantee investment contracts [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Real estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset mix	3.50%
Real estate [Member] | Total [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	36.7
Real estate [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	28.9
Real estate [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Real estate [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7.8
Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset mix	2.80%
Other [Member] | Total [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	31.0
Other [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	31.0
Other [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Other [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0