Income Taxes (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended			27 Months Ended
	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2012
Income Taxes [Line Items]
Total expense, before tax		$ 123.9	$ 185.2	$ 198.7
Income tax expense		71.3	83.2	71.4
Unrecognized tax benefits		150.6	142.6	145.2	$ 142.6	$ 138.4
Interest and penalty exposure reported as accrued income tax		4.5
Valuation allowances		69.1	87.9		87.9
Tax credit carryforward		12.3	12.1		$ 12.1
Estimated future taxable income to realize foreign tax credits		$ 77.4
Estimated future taxable income to realize foreign tax credits, expiration year		2022
Valuation allowance, increase (decrease)		$ (18.8)
Unremitted earnings not taxed		268.7
UTB if recognized, would impact the reported effective tax rate		111.7
UTB if recognized, would impact the reported effective tax rate, net of federal benefit		109.4
UTB if recognized, written off as a result of a change in ownership		5.0
UTB increase (decrease) due to uncertain tax positions		$ 10.4	10.5	$ 8.5
Asbestos PI Trust [Member]
Income Taxes [Line Items]
Sale of stock by investee	4,281,884				20,448,362
Minimum [Member]
Income Taxes [Line Items]
Number of open tax years subject to audit		3 years
Future potential tax adjustments years		2010
Maximum [Member]
Income Taxes [Line Items]
Number of open tax years subject to audit		6 years
Future potential tax adjustments years		2014
Federal [Member]
Income Taxes [Line Items]
Valuation allowance, increase (decrease)		$ (31.6)
UTB increase (decrease) due to uncertain tax positions		5.8
State [Member]
Income Taxes [Line Items]
Operating loss carryforwards		863.1	969.6		$ 969.6
Valuation allowances		13.8
Estimated future taxable income to utilize deferred tax assets		971.1
Valuation allowance, increase (decrease)		(0.8)
UTB increase (decrease) due to uncertain tax positions		$ (0.1)
State [Member] | Minimum [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date		2016
Tax credit carryforward, expiration year		2016
State [Member] | Maximum [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date		2035
Tax credit carryforward, expiration year		2035
Foreign [Member]
Income Taxes [Line Items]
Operating loss carryforwards		$ 202.9	158.3		158.3
Operating loss carryforwards, finite		126.0
Operating loss carryforwards, indefinite		76.9
Valuation allowances		55.3
Tax credit carryforward gross		27.1	54.3		54.3
Tax credit carryforward netted with unrecognized tax benefits		12.3	$ 12.1		$ 12.1
Estimated future taxable income to realize foreign tax credits		34.3
Valuation allowance, increase (decrease)		$ 13.6
Foreign [Member] | Minimum [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date		2016
Tax credit carryforward, expiration year		2016
Foreign [Member] | Maximum [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date		2033
Tax credit carryforward, expiration year		2022