Acquisitions (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 28, 2017	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016	Feb. 27, 2017
Business Acquisition
Acquisition, integration and restructuring expenses		$ 29,748	$ 13,015	$ 101,931	$ 14,997
Business Acquisition, Effective Date of Acquisition	Feb. 27, 2017
TS
Business Acquisition
Goodwill and intangible assets, tax deductible amount						$ 1,100,000
Business Combination, Consideration Transferred	$ 2,700,000
Payments to Acquire Businesses, Gross	$ 2,500,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	2,785,402
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 247,000
Net sales		$ 2,200,000		$ 6,100,000
TS | Customer Relationships
Business Acquisition
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	14 years
Finite-lived Intangible Assets Acquired	$ 898,000
TS | Trade Names
Business Acquisition
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Finite-lived Intangible Assets Acquired	$ 43,000