Employee Benefit Plans (Reconciliation of Benefit Obligations, Plan Assets and Funded Status) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Amount Recognized in Balance Sheet:
Other assets		$ 666.2	$ 621.7
Accrued compensation		(130.3)	(129.2)
Postretirement Benefits [Member]
Change in Benefit Obligation:
Beginning balance		(26.0)	(76.6)
Service cost		(0.1)	(0.1)	$ (0.7)
Interest cost		(1.3)	(1.7)	(3.7)
Actuarial (loss) gain		0.3	2.6
Benefits paid		(0.4)	(1.4)
Plan amendments		0.0	(1.0)
Curtailments		0.0	0.0
Settlements		0.0	0.0
Special termination benefits		0.0	(0.1)
Divestitures		0.0	50.1
Venezuela deconsolidation		0.0	0.0
Foreign currency changes and other		(1.5)	(0.6)
Ending balance		(28.2)	(26.0)	(76.6)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance		0.0	0.0
Actual return on plan assets		0.0	0.0
Company contributions		0.4	1.4
Benefits paid		0.4	1.4
Divestitures		0.0	0.0
Foreign currency changes and other		0.0	0.0
Ending balance		0.0	0.0	0.0
Funded Status:
Funded status at end of year	[1]	(28.2)	(26.0)
Amount Recognized in Balance Sheet:
Other assets		0.0	0.0
Accrued compensation		(2.7)	(2.4)
Employee benefit plans liability		(25.5)	(23.6)
Net amount recognized	[1]	(28.2)	(26.0)
Pretax Amounts Recognized in Accumulated Other Comprehensive Loss:
Net actuarial loss		1.2	1.7
Prior service credit		(1.3)	(1.6)
Total pretax amount recognized		(0.1)	0.1
Domestic Plan [Member] | Defined Benefit Pension Plans [Member]
Change in Benefit Obligation:
Beginning balance		(87.6)	(606.8)
Service cost		(4.3)	(6.4)	(13.0)
Interest cost		(3.0)	(6.5)	(25.1)
Actuarial (loss) gain		0.6	(7.5)
Benefits paid		(5.4)	(26.0)
Plan amendments		0.0	0.0
Curtailments		0.0	0.2
Settlements		0.0	0.0
Special termination benefits		0.0	0.0
Divestitures		0.0	509.9
Venezuela deconsolidation		0.0	0.0
Foreign currency changes and other		0.0	3.5
Ending balance		(88.9)	(87.6)	(606.8)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance		51.4	408.3
Actual return on plan assets		5.5	0.7
Company contributions		11.6	26.6
Benefits paid		5.4	26.0
Divestitures		0.0	(355.9)
Foreign currency changes and other		0.0	(2.3)
Ending balance		63.1	51.4	408.3
Funded Status:
Funded status at end of year	[1]	(25.8)	(36.2)
Amount Recognized in Balance Sheet:
Other assets		0.0	0.0
Accrued compensation		(1.0)	(1.7)
Employee benefit plans liability		(24.8)	(34.5)
Net amount recognized	[1]	(25.8)	(36.2)
Pretax Amounts Recognized in Accumulated Other Comprehensive Loss:
Net actuarial loss		41.4	49.5
Prior service credit		(0.2)	(0.2)
Total pretax amount recognized		41.2	49.3
Supplemental Information:
Accumulated benefit obligation		85.9	85.2
Plans with Projected Benefit Obligation in Excess of Plan Assets:
Projected benefit obligation		88.9	87.6
Fair value plan assets		63.1	51.4
Plans with Accumulated Benefit Obligation in Excess of Plan Assets:
Projected benefit obligation		88.9	87.6
Accumulated benefit obligation		85.9	85.2
Fair value plan assets		63.1	51.4
Foreign Plan [Member] | Defined Benefit Pension Plans [Member]
Change in Benefit Obligation:
Beginning balance		(652.9)	(667.7)
Service cost		(4.6)	(5.0)	(5.3)
Interest cost		(18.0)	(21.8)	(23.6)
Actuarial (loss) gain		(15.5)	(95.9)
Benefits paid		(42.5)	(37.3)
Plan amendments		0.0	0.0
Curtailments		0.0	1.0
Settlements		0.0	0.0
Special termination benefits		0.0	0.0
Divestitures		0.0	0.0
Venezuela deconsolidation		0.0	1.5
Foreign currency changes and other		(65.7)	97.7
Ending balance		(714.2)	(652.9)	(667.7)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance		613.7	576.3
Actual return on plan assets		49.9	153.6
Company contributions		19.7	20.0
Benefits paid		42.5	37.3
Divestitures		0.0	0.0
Foreign currency changes and other		64.6	(98.9)
Ending balance		705.4	613.7	$ 576.3
Funded Status:
Funded status at end of year	[1]	(8.8)	(39.2)
Amount Recognized in Balance Sheet:
Other assets		82.0	54.8
Accrued compensation		(2.2)	(1.4)
Employee benefit plans liability		(88.6)	(92.6)
Net amount recognized	[1]	(8.8)	(39.2)
Pretax Amounts Recognized in Accumulated Other Comprehensive Loss:
Net actuarial loss		176.8	176.5
Prior service credit		(0.9)	(1.0)
Total pretax amount recognized		175.9	175.5
Supplemental Information:
Accumulated benefit obligation		199.8	182.3
Plans with Projected Benefit Obligation in Excess of Plan Assets:
Projected benefit obligation		216.7	200.8
Fair value plan assets		125.9	106.8
Plans with Accumulated Benefit Obligation in Excess of Plan Assets:
Projected benefit obligation		202.0	182.8
Accumulated benefit obligation		191.9	172.8
Fair value plan assets		114.0	92.9
Foreign Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance		$ 613.7
Ending balance			$ 613.7

[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