Pension Plans and Other Postretirement Benefits - Additional Information (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2005
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation for defined benefit pension plans		$ 1,100,000	$ 776,600
Post retirement medical benefit available to U.S. employees, change of age group, current range					under age 50
Age group for capping of retiree medical premium					age 50 and above
Transfers between fair value level 1 and level 2		$ 0
Percentage of defined benefit plan assets in U.S. and U.K.		98.00%
Change in percentage of broad asset class targets		10.00%
Pension and postretirement contributions		$ 21,613	$ 13,916	$ 13,294
Assumed rate of increase in the pre-65 per capita cost of covered health care benefits for U.S. retirees		0.00%
Assumed rate of increase in the post-65 per capita cost of covered health care benefits for U.S. retirees		0.00%
Defined contribution plan, employer matching contribution percentage		5.00%
U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Weighted-average expected rate of return on plan assets		6.85%	6.91%	7.25%
Projected benefit obligation recognized		$ 707,090	$ 729,652	$ 629,337
Foreign Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Weighted-average expected rate of return on plan assets		5.63%	4.00%	4.35%
Projected benefit obligation recognized		$ 373,857	$ 53,112	$ 49,245
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Weighted-average expected rate of return on plan assets		7.00%	7.00%	7.00%
Expected premium contribution		$ 4,000
Projected benefit obligation recognized		56,499	$ 64,500	$ 62,832
Total Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to benefit plans in 2016		13,000
Supplemental Executive Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to benefit plans in 2016		1,100
Expenses (credits) related to supplemental executive retirement plan		(2,100)	7,300	(1,500)
Projected benefit obligation recognized		23,100	26,400
2004 Defined Contribution Plan | U.S. Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, employer contributions		12,800	8,400	8,800
Employee Savings Plan | U.S. Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, employer contributions		11,700	10,000	10,600
Employee Savings Plan | Foreign Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, employer contributions		$ 7,200	$ 10,100	$ 10,300
Subsequent Event | U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Weighted-average expected rate of return on plan assets	6.90%
Subsequent Event | Foreign Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Weighted-average expected rate of return on plan assets	5.65%
Subsequent Event | Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Weighted-average expected rate of return on plan assets	7.00%