Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

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Debt (2016 Revolving Credit Agreement) (Narrative) (Details) - USD ($) $ in Billions	9 Months Ended
	Sep. 30, 2018	Nov. 22, 2016
2016 Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 2.0
2018 Senior Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 2.0
Three Full Fiscal Quarters Following Qualifying Acquisition [Member] \| 2016 Term Loans
Debt Instrument [Line Items]
Debt Instrument, Covenant Description	4.25 to 1.00
Three Full Fiscal Quarters Following Qualifying Acquisition [Member] \| 2018 Senior Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Covenant Description	4.25 to 1.00
Trailing Four Quarters [Member] \| Line of Credit [Member] \| 2016 Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Covenant Terms	3.75 to 1.00
Trailing Four Quarters [Member] \| Line of Credit [Member] \| 2018 Senior Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Covenant Terms	3.75 to 1.00