Acquisitions - Narrative (Details) - Maintenance Supply Headquarters $ in Millions	Jun. 23, 2017 USD ($)
Business Acquisition [Line Items]
Cash consideration	$ 513
Intangible assets acquired	259
Goodwill expected to be tax deductible	160
Trademarks
Business Acquisition [Line Items]
Intangible assets acquired	$ 34
Weighted average useful life	15 years
Customer Lists
Business Acquisition [Line Items]
Intangible assets acquired	$ 225
Weighted average useful life	20 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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