Acquisition | TS Narrative (Details) - USD ($)	1 Months Ended		3 Months Ended								11 Months Ended	12 Months Ended
	Aug. 31, 2018	Feb. 28, 2017	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018	Feb. 27, 2017
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs			$ 10,000,000.0	$ 4,600,000	$ 5,200,000	$ 6,200,000	$ 21,100,000	$ 20,300,000	$ 13,300,000	$ 33,200,000		$ 26,030,000	$ 87,920,000	$ 136,272,000
TS
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		Feb. 27, 2017
Finite-lived Intangible Assets Acquired														1,000,000,000.0
Business Combination, Consideration Transferred		$ 2,800,000,000
Payments to Acquire Businesses, Gross	$ 120,000,000	$ 2,500,000,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares		2,785,402
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		$ 247,000,000
Business Acquisition, Goodwill and Intangibles, Expected Tax Deductible Amount															$ 1,200,000,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual											$ 7,600,000,000
Business Combination, Acquisition Related Costs												$ 0	45,379,000	136,272,000
Deferred Other Tax Benefit (Expense)													13,000,000.0
Trade Names [Member] | TS
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired		$ 44,000,000												44,000,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		5 years
Customer Relationships [Member] | TS
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired		$ 875,000,000												$ 875,000,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		14 years
Working Capital Adjustment Gain/Loss [Member] | TS
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs													$ (9,600,000)