Benefit Plans and Other Postretirement Benefits (Tables)

12 Months Ended

Dec. 31, 2017

Pension Benefits

Defined Benefit Plan Disclosure

Schedule of change in projected benefit obligation and plan assets

	U.S. Plans						International Plans						Total
		2017			2016			2017			2016			2017		2016
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$	469.8		$	460.8		$	233.5		$	174.4		$	703.3	$	635.2
Service cost		6.7			6.2			2.9			2.8			9.6		9.0
Interest cost		15.3			15.4			4.7			5.5			20.0		20.9
Acquisitions		—			—			—			47.4			—		47.4
Plan amendments		—			3.7			—			—			—		3.7
Actuarial (gain) loss		21.1			11.6			(2.2)			28.0			18.9		39.6
Foreign exchange translation		—			—			26.7			(17.3)			26.7		(17.3)
Benefits paid		(26.2)			(27.9)			(10.6)			(7.3)			(36.8)		(35.2)
Projected benefit obligation at end of year		486.7			469.8			255.0			233.5			741.7		703.3
Change in plan assets:
Fair value of plan assets at beginning of year		342.1			333.2			97.8			59.0			439.9		392.2
Actual return on plan assets		57.2			20.4			5.2			11.4			62.4		31.8
Employer contributions		16.5			16.4			6.0			5.8			22.5		22.2
Acquisitions		—			—			—			36.7			—		36.7
Foreign exchange translation		—			—			9.9			(7.8)			9.9		(7.8)
Benefits paid		(26.2)			(27.9)			(10.6)			(7.3)			(36.8)		(35.2)
Fair value of plan assets at end of year		389.6			342.1			108.3			97.8			497.9		439.9
Underfunded status at end of year	$	97.1		$	127.7		$	146.7		$	135.7		$	243.8	$	263.4
Amounts recognized on the balance sheet as of December 31:
Other accrued expenses	$	—		$	—		$	3.1		$	2.8		$	3.1	$	2.8
Accrued pension and postretirement benefit obligations		97.1			127.7			143.6			132.9			240.7		260.6
Underfunded status at end of year	$	97.1		$	127.7		$	146.7		$	135.7		$	243.8	$	263.4
Accumulated other comprehensive loss, net	$	(110.5)		$	(129.3)		$	(53.9)		$	(62.5)		$	(164.4)	$	(191.8)
Weighted average assumptions used to determine projected benefit obligations:
Discount rate		3.48	%		3.93	%		2.21	%		2.28	%
Rate of compensation increase		3.00	%		3.00	%		1.70	%		1.63	%

Schedule of amounts recognized in the balance sheet

	U.S. Plans						International Plans						Total
		2017			2016			2017			2016			2017		2016
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$	469.8		$	460.8		$	233.5		$	174.4		$	703.3	$	635.2
Service cost		6.7			6.2			2.9			2.8			9.6		9.0
Interest cost		15.3			15.4			4.7			5.5			20.0		20.9
Acquisitions		—			—			—			47.4			—		47.4
Plan amendments		—			3.7			—			—			—		3.7
Actuarial (gain) loss		21.1			11.6			(2.2)			28.0			18.9		39.6
Foreign exchange translation		—			—			26.7			(17.3)			26.7		(17.3)
Benefits paid		(26.2)			(27.9)			(10.6)			(7.3)			(36.8)		(35.2)
Projected benefit obligation at end of year		486.7			469.8			255.0			233.5			741.7		703.3
Change in plan assets:
Fair value of plan assets at beginning of year		342.1			333.2			97.8			59.0			439.9		392.2
Actual return on plan assets		57.2			20.4			5.2			11.4			62.4		31.8
Employer contributions		16.5			16.4			6.0			5.8			22.5		22.2
Acquisitions		—			—			—			36.7			—		36.7
Foreign exchange translation		—			—			9.9			(7.8)			9.9		(7.8)
Benefits paid		(26.2)			(27.9)			(10.6)			(7.3)			(36.8)		(35.2)
Fair value of plan assets at end of year		389.6			342.1			108.3			97.8			497.9		439.9
Underfunded status at end of year	$	97.1		$	127.7		$	146.7		$	135.7		$	243.8	$	263.4
Amounts recognized on the balance sheet as of December 31:
Other accrued expenses	$	—		$	—		$	3.1		$	2.8		$	3.1	$	2.8
Accrued pension and postretirement benefit obligations		97.1			127.7			143.6			132.9			240.7		260.6
Underfunded status at end of year	$	97.1		$	127.7		$	146.7		$	135.7		$	243.8	$	263.4
Accumulated other comprehensive loss, net	$	(110.5)		$	(129.3)		$	(53.9)		$	(62.5)		$	(164.4)	$	(191.8)
Weighted average assumptions used to determine projected benefit obligations:
Discount rate		3.48	%		3.93	%		2.21	%		2.28	%
Rate of compensation increase		3.00	%		3.00	%		1.70	%		1.63	%

Schedule of weighted average assumptions used to determine projected benefit obligations

	U.S. Plans						International Plans						Total
		2017			2016			2017			2016			2017		2016
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$	469.8		$	460.8		$	233.5		$	174.4		$	703.3	$	635.2
Service cost		6.7			6.2			2.9			2.8			9.6		9.0
Interest cost		15.3			15.4			4.7			5.5			20.0		20.9
Acquisitions		—			—			—			47.4			—		47.4
Plan amendments		—			3.7			—			—			—		3.7
Actuarial (gain) loss		21.1			11.6			(2.2)			28.0			18.9		39.6
Foreign exchange translation		—			—			26.7			(17.3)			26.7		(17.3)
Benefits paid		(26.2)			(27.9)			(10.6)			(7.3)			(36.8)		(35.2)
Projected benefit obligation at end of year		486.7			469.8			255.0			233.5			741.7		703.3
Change in plan assets:
Fair value of plan assets at beginning of year		342.1			333.2			97.8			59.0			439.9		392.2
Actual return on plan assets		57.2			20.4			5.2			11.4			62.4		31.8
Employer contributions		16.5			16.4			6.0			5.8			22.5		22.2
Acquisitions		—			—			—			36.7			—		36.7
Foreign exchange translation		—			—			9.9			(7.8)			9.9		(7.8)
Benefits paid		(26.2)			(27.9)			(10.6)			(7.3)			(36.8)		(35.2)
Fair value of plan assets at end of year		389.6			342.1			108.3			97.8			497.9		439.9
Underfunded status at end of year	$	97.1		$	127.7		$	146.7		$	135.7		$	243.8	$	263.4
Amounts recognized on the balance sheet as of December 31:
Other accrued expenses	$	—		$	—		$	3.1		$	2.8		$	3.1	$	2.8
Accrued pension and postretirement benefit obligations		97.1			127.7			143.6			132.9			240.7		260.6
Underfunded status at end of year	$	97.1		$	127.7		$	146.7		$	135.7		$	243.8	$	263.4
Accumulated other comprehensive loss, net	$	(110.5)		$	(129.3)		$	(53.9)		$	(62.5)		$	(164.4)	$	(191.8)
Weighted average assumptions used to determine projected benefit obligations:
Discount rate		3.48	%		3.93	%		2.21	%		2.28	%
Rate of compensation increase		3.00	%		3.00	%		1.70	%		1.63	%

Schedule of components of net pension expense

	U.S. Plans									International Plans									Total
	2017			2016			2015			2017			2016			2015			2017		2016		2015
Components of net pension expense:
Service cost	$	6.7		$	6.2		$	6.5		$	2.9		$	2.8		$	2.8		$	9.6	$	9.0	$	9.3
Interest cost		15.3			15.4			17.4			4.7			5.5			5.4			20.0		20.9		22.8
Expected return on plan assets		(27.2)			(26.2)			(25.9)			(3.5)			(3.9)			(3.2)			(30.7)		(30.1)		(29.1)
Amortization of prior service cost		2.7			2.4			2.3			—			—			—			2.7		2.4		2.3
Amortization of actuarial losses		18.3			18.6			21.5			4.6			3.4			4.2			22.9		22.0		25.7
Net pension expense	$	15.8		$	16.4		$	21.8		$	8.7		$	7.8		$	9.2		$	24.5	$	24.2	$	31.0
Weighted average assumptions used to determine net periodic benefit cost:
Discount rate		3.93	%		4.11	%		3.75	%		2.28	%		2.96	%		2.91	%
Expected long-term return on assets		7.75	%		7.75	%		8.00	%		3.80	%		4.29	%		5.47	%
Rate of compensation increase		3.00	%		3.00	%		3.00	%		1.63	%		1.61	%		1.45	%

Schedule of weighted average assumptions used to determine net benefit cost/expense

	U.S. Plans									International Plans									Total
	2017			2016			2015			2017			2016			2015			2017		2016		2015
Components of net pension expense:
Service cost	$	6.7		$	6.2		$	6.5		$	2.9		$	2.8		$	2.8		$	9.6	$	9.0	$	9.3
Interest cost		15.3			15.4			17.4			4.7			5.5			5.4			20.0		20.9		22.8
Expected return on plan assets		(27.2)			(26.2)			(25.9)			(3.5)			(3.9)			(3.2)			(30.7)		(30.1)		(29.1)
Amortization of prior service cost		2.7			2.4			2.3			—			—			—			2.7		2.4		2.3
Amortization of actuarial losses		18.3			18.6			21.5			4.6			3.4			4.2			22.9		22.0		25.7
Net pension expense	$	15.8		$	16.4		$	21.8		$	8.7		$	7.8		$	9.2		$	24.5	$	24.2	$	31.0
Weighted average assumptions used to determine net periodic benefit cost:
Discount rate		3.93	%		4.11	%		3.75	%		2.28	%		2.96	%		2.91	%
Expected long-term return on assets		7.75	%		7.75	%		8.00	%		3.80	%		4.29	%		5.47	%
Rate of compensation increase		3.00	%		3.00	%		3.00	%		1.63	%		1.61	%		1.45	%

Fair values of Company's pension plan assets by asset category

									Assets
									Measured at
									Net Asset
Asset Category	Total		Level 1		Level 2		Level 3		Value (a)
December 31, 2017
Equity securities:
U.S. equities — large cap	$	141.5	$	106.6	$	34.9	$	—	$	—
U.S. equities — small/mid cap and other		22.0		—		22.0		—		—
International equities — growth		35.6		30.4		5.2		—		—
International equities — other		95.5		—		40.7		—		54.8
Alternative investment funds		12.9		—		—		—		12.9
Fixed income securities:
U.S. fixed income securities — short term		6.1		—		—		—		6.1
U.S. fixed income securities — intermediate term		61.4		61.4		—		—		—
U.S. fixed income securities — high yield		21.9		—		21.9		—		—
International fixed income securities — other		47.4		—		47.4		—		—
Insurance contracts		37.9		—		—		37.9		—
Real estate funds		7.0		—		—		7.0		—
Cash and cash equivalents		8.7		8.7		—		—		—
Total	$	497.9	$	207.1	$	172.1	$	44.9	$	73.8
December 31, 2016
Equity securities:
U.S. equities — large cap	$	118.8	$	88.7	$	30.1	$	—	$	—
U.S. equities — small/mid cap and other		25.8		—		25.8		—		—
International equities — growth		46.5		46.5		—		—		—
International equities — other		60.6		7.0		33.9		—		19.7
Alternative investment funds		12.6		—		—		—		12.6
Fixed income securities:
U.S. fixed income securities — short term		6.0		—		—		—		6.0
U.S. fixed income securities — intermediate term		58.4		58.4		—		—		—
U.S. fixed income securities — high yield		22.2		—		22.2		—		—
International fixed income securities — other		43.0		—		43.0		—		—
Insurance contracts		34.0		—		—		34.0		—
Cash and cash equivalents		12.0		12.0		—		—		—
Total	$	439.9	$	212.6	$	155.0	$	34.0	$	38.3

(a) Certain investments measured at fair value using the net asset value (NAV) practical expedient have been removed from the fair value hierarchy but included in the table above in order to permit the reconciliation of the fair value hierarchy to total plan assets.

Reconciliation of fair value measurements using significant unobservable inputs (Level 3)

		2017		2016
Balance on January 1	$	34.0	$	—
Additions due to acquisition		—		34.3
Unrealized gains (losses), net		0.6		2.7
Purchases, sales and settlements, net		5.8		(0.9)
Foreign currency translation		4.5		(2.1)
Balance on December 31	$	44.9	$	34.0

Schedule of amounts, before tax, included in Accumulated other comprehensive loss that have not yet been recognized as expense

	U.S.				International
	Plans				Plans				Total
		2017		2016		2017		2016		2017		2016
Net loss	$	167.7	$	194.7	$	70.0	$	71.0	$	237.7	$	265.7
Net prior service cost		7.7		10.5		—		—		7.7		10.5

Benefit payments related to the pension plans, including amounts to be paid out of Company assets and reflecting future expected service

	U.S.		International
	Plans		Plans		Total
2018	$	24.8	$	7.5	$	32.3
2019		25.8		7.1		32.9
2020		26.9		7.3		34.2
2021		27.8		9.2		37.0
2022		28.9		9.4		38.3
2023-2027		151.2		51.1		202.3

Other Postretirement Benefits

Defined Benefit Plan Disclosure

Schedule of change in projected benefit obligation and plan assets

	2017			2016
Change in benefit obligation:
Benefit obligation at beginning of year	$	13.6		$	13.2
Interest cost		0.4			0.4
Benefits paid		(0.9)			(0.9)
Actuarial loss		—			0.9
Benefit obligation at end of year	$	13.1		$	13.6
Amounts recognized on the balance sheet as of December 31:
Other accrued expenses	$	1.2		$	1.2
Accrued pension and postretirement benefit obligations		11.9			12.4
Unfunded status at end of year	$	13.1		$	13.6
Accumulated other comprehensive loss, net	$	(3.2)		$	(3.6)
Weighted average assumptions used to determine projected benefit obligations:
Discount rate		3.29	%		3.65	%

Schedule of amounts recognized in the balance sheet

	2017			2016
Change in benefit obligation:
Benefit obligation at beginning of year	$	13.6		$	13.2
Interest cost		0.4			0.4
Benefits paid		(0.9)			(0.9)
Actuarial loss		—			0.9
Benefit obligation at end of year	$	13.1		$	13.6
Amounts recognized on the balance sheet as of December 31:
Other accrued expenses	$	1.2		$	1.2
Accrued pension and postretirement benefit obligations		11.9			12.4
Unfunded status at end of year	$	13.1		$	13.6
Accumulated other comprehensive loss, net	$	(3.2)		$	(3.6)
Weighted average assumptions used to determine projected benefit obligations:
Discount rate		3.29	%		3.65	%

Schedule of weighted average assumptions used to determine projected benefit obligations

	2017			2016
Change in benefit obligation:
Benefit obligation at beginning of year	$	13.6		$	13.2
Interest cost		0.4			0.4
Benefits paid		(0.9)			(0.9)
Actuarial loss		—			0.9
Benefit obligation at end of year	$	13.1		$	13.6
Amounts recognized on the balance sheet as of December 31:
Other accrued expenses	$	1.2		$	1.2
Accrued pension and postretirement benefit obligations		11.9			12.4
Unfunded status at end of year	$	13.1		$	13.6
Accumulated other comprehensive loss, net	$	(3.2)		$	(3.6)
Weighted average assumptions used to determine projected benefit obligations:
Discount rate		3.29	%		3.65	%

Schedule of components of net pension expense

	2017			2016			2015
Components of net postretirement benefit expense:
Service cost	$	—		$	—		$	0.1
Interest cost		0.4			0.4			0.4
Amortization of actuarial losses		0.5			0.7			0.3
Net postretirement benefit expense	$	0.9		$	1.1		$	0.8
Weighted average assumptions used to determine net postretirement benefit expense:
Discount rate		3.65	%		3.71	%		3.50	%

Schedule of weighted average assumptions used to determine net benefit cost/expense

	2017			2016			2015
Components of net postretirement benefit expense:
Service cost	$	—		$	—		$	0.1
Interest cost		0.4			0.4			0.4
Amortization of actuarial losses		0.5			0.7			0.3
Net postretirement benefit expense	$	0.9		$	1.1		$	0.8
Weighted average assumptions used to determine net postretirement benefit expense:
Discount rate		3.65	%		3.71	%		3.50	%