Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended			12 Months Ended
		Jun. 30, 2017	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Amortization period for gains and losses, period 1					3 years
Amortization period for gains and losses, period 2					5 years
Pension settlement charge							$ (7.3)
Postemployment benefits liability					$ 9.7	$ 15.0
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rate					2.66%	2.81%
Rate of return on assets					5.12%
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Pension Plan, Liabilities, Noncurrent					$ 0.0	$ 50.1
Defined Benefit Plan, Plan Assets, Divestiture					0.0	0.0
Net amount recognized	[1]				(28.2)	(26.0)
Qualified pension plans, benefit obligations			$ 76.6		28.2	26.0	76.6
Qualified pension plans, plan assets			0.0		0.0	0.0	0.0
Net periodic benefit cost	[2]				2.8	$ 0.8	2.2
Net actuarial loss					0.1
Expected prior service credit					$ (0.3)
Weighted average discount rate					4.75%	5.33%
Minimum [Member] | U.S. Pension and Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions related to continuing operations					$ 10.0
Minimum [Member] | International Pension and Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions related to continuing operations					20.0
Maximum [Member] | U.S. Pension and Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions related to continuing operations					15.0
Maximum [Member] | International Pension and Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions related to continuing operations					25.0
Discontinued Operations [Member] | U.S. Qualified Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Pension Plan, Liabilities, Noncurrent						$ 499.6
Defined Benefit Plan, Plan Assets, Divestiture						355.9
Discontinued Operations [Member] | United States Postretirement Benefit Plan of US Entity [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Pension Plan, Liabilities, Noncurrent						60.4
Domestic Plan [Member] | Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Pension Plan, Liabilities, Noncurrent					0.0	509.9
Defined Benefit Plan, Plan Assets, Divestiture					0.0	355.9
Net amount recognized	[1]				(25.8)	(36.2)
Qualified pension plans, benefit obligations			606.8		88.9	87.6	606.8
Qualified pension plans, plan assets			408.3		63.1	51.4	408.3
Net periodic benefit cost	[2]				9.2	$ 15.4	$ 76.4
Net actuarial loss					5.2
Expected prior service credit					$ 0.0
Weighted average discount rate					3.48%	3.67%
Rate of return on assets						7.00%	7.25%
Domestic Plan [Member] | Discontinued Operations, Disposed of by Sale [Member] | Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	[2]					$ 4.4	$ 53.7
Foreign Plan [Member] | Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Pension Plan, Liabilities, Noncurrent					$ 0.0	0.0
Defined Benefit Plan, Plan Assets, Divestiture					0.0	0.0
Net amount recognized	[1]				(8.8)	(39.2)
Qualified pension plans, benefit obligations			667.7		714.2	652.9	667.7
Qualified pension plans, plan assets			576.3		705.4	613.7	576.3
Net periodic benefit cost	[2]				4.9	$ 0.5	$ 1.4
Net actuarial loss					7.2
Expected prior service credit					$ (0.1)
Weighted average discount rate					2.56%	2.69%
Rate of return on assets					5.09%	6.40%	6.55%
UK Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Rate of return on assets					5.15%
UK Pension Plan [Member] | Equity Securities, Emerging Market Debt and High Yield Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit, Equity Securities Allocation					20.00%
Expected long term rate of return on equity securities, minimum					5.00%
Expected long term rate of return on equity securities, maximum					9.00%
UK Pension Plan [Member] | Corporate and Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
assumptions used calculating net periodic benefit allocation, debt securities allocation					80.00%
Expected long term rate of return on debt securities, minimum					2.00%
Expected long term rate of return on debt securities, maximum					4.00%
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Loss Contingency, Loss in Period		$ 18.2			$ 18.2
UK Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Qualified pension plans, benefit obligations					494.0	$ 448.6
Qualified pension plans, plan assets					573.6	502.0
U.S. Qualified Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Qualified pension plans, benefit obligations					76.7	75.5
Qualified pension plans, plan assets					$ 63.1	51.4
Pension settlement charge			$ 4.1	$ 23.8
Rate of return on assets					5.50%
U.S. Qualified Pension Plan [Member] | Corporate and Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
assumptions used calculating net periodic benefit allocation, debt securities allocation					70.00%
Expected long term rate of return on debt securities, minimum					3.00%
Expected long term rate of return on debt securities, maximum					5.00%
U.S. Qualified Pension Plan [Member] | Equity Securities and High Yield Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit, Equity Securities Allocation					30.00%
Expected long term rate of return on equity securities, minimum					6.00%
Expected long term rate of return on equity securities, maximum					8.00%
UK defined contribution plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Employer match toward contributions, doubled					5.00%
Maximum contribution percent of eligible compensation					10.00%
Employer contribution					$ 6.7	6.5	$ 7.6
Personal Savings Account Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Maximum employee contribution to plan					25.00%
Maximum contribution for eligible participants					3.00%
Employer match toward contributions, fifty cents for dollar, minimum					4.00%
Employer match toward contributions, fifty cents for dollar, maximum					6.00%
Employer contribution					$ 2.6	$ 3.8	$ 4.0
Retirement Savings Account Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Employer match toward contributions, fifty cents for dollar, minimum					3.00%
Employer match toward contributions, fifty cents for dollar, maximum					6.00%
Vesting period					3 years

[1] Pension Plans U.S. Plans Non-U.S. Plans Postretirement Benefits 2017 2016 2017 2016 2017 2016Change in Benefit Obligation: Beginning balance $(87.6) $(606.8) $(652.9) $(667.7) $(26.0) $(76.6)Service cost (4.3) (6.4) (4.6) (5.0) (.1) (.1)Interest cost (3.0) (6.5) (18.0) (21.8) (1.3) (1.7)Actuarial (loss) gain .6 (7.5) (15.5) (95.9) .3 2.6Benefits paid 5.4 26.0 42.5 37.3 .4 1.4Plan amendments — — — — — (1.0)Curtailments — .2 — 1.0 — —Settlements — — — — — —Special termination benefits — — — — — (.1)Divestitures — 509.9 — — — 50.1Venezuela deconsolidation — — — 1.5 — —Foreign currency changes and other — 3.5 (65.7) 97.7 (1.5) (.6)Ending balance $(88.9) $(87.6) $(714.2) $(652.9) $(28.2) $(26.0)Change in Plan Assets: Beginning balance $51.4 $408.3 $613.7 $576.3 $— $—Actual return on plan assets 5.5 .7 49.9 153.6 — —Company contributions 11.6 26.6 19.7 20.0 .4 1.4Benefits paid (5.4) (26.0) (42.5) (37.3) (.4) (1.4)Divestitures — (355.9) — — — —Foreign currency changes and other — (2.3) 64.6 (98.9) — —Ending balance $63.1 $51.4 $705.4 $613.7 $— $—Funded Status: Funded status at end of year $(25.8) $(36.2) $(8.8) $(39.2) $(28.2) $(26.0)Amount Recognized in Balance Sheet: Other assets $— $— $82.0 $54.8 $— $—Accrued compensation (1.0) (1.7) (2.2) (1.4) (2.7) (2.4)Employee benefit plans liability (24.8) (34.5) (88.6) (92.6) (25.5) (23.6)Net amount recognized $(25.8) $(36.2) $(8.8) $(39.2) $(28.2) $(26.0)Pretax Amounts Recognized in Accumulated Other Comprehensive Loss: Net actuarial loss $41.4 $49.5 $176.8 $176.5 $1.2 $1.7Prior service credit (.2) (.2) (.9) (1.0) (1.3) (1.6)Total pretax amount recognized $41.2 $49.3 $175.9 $175.5 $(.1) $.1Supplemental Information: Accumulated benefit obligation $85.9 $85.2 $199.8 $182.3 N/A N/APlans with Projected Benefit Obligation in Excess of Plan Assets: Projected benefit obligation $88.9 $87.6 $216.7 $200.8 N/A N/AFair value plan assets 63.1 51.4 125.9 106.8 N/A N/APlans with Accumulated Benefit Obligation in Excess of Plan Assets: Projected benefit obligation $88.9 $87.6 $202.0 $182.8 N/A N/AAccumulated benefit obligation 85.9 85.2 191.9 172.8 N/A N/AFair value plan assets 63.1 51.4 114.0 92.9 N/A N/A

[2] Includes $4.4 and $53.7 of the U.S. pension plans in 2016 and 2015, respectively, and immaterial amounts of the postretirement benefit plans (related to the U.S.) in 2016 and 2015, which are included in discontinued operations.