Aggregate dividends declared during the period for each share of common stock outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

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Subsequent Events - Additional Information (Detail) $ / shares in Units, € in Millions, $ in Millions								3 Months Ended		9 Months Ended
	Nov. 01, 2017 $ / shares	Oct. 09, 2017 EUR (€)	Oct. 09, 2017 USD ($)	Oct. 06, 2017 USD ($)	Aug. 02, 2017 $ / shares	Apr. 26, 2017 $ / shares	Feb. 15, 2017 $ / shares	Sep. 30, 2017 $ / shares	Sep. 30, 2016 $ / shares	Sep. 30, 2017 $ / shares	Sep. 30, 2016 $ / shares
Subsequent Event [Line Items]
Cash dividends declared (in dollars per share)					$ 2.00	$ 2.00	$ 2.00	$ 2	$ 1.75	$ 6	$ 5.25
Subsequent event [Member]
Subsequent Event [Line Items]
Cash dividends declared (in dollars per share)	$ 2.00
Itconic [Member] \| Subsequent event [Member]
Subsequent Event [Line Items]
Cash consideration for acquisition		€ 215.0	$ 252.6
Zenium, Instanbul One [Member] \| Subsequent event [Member]
Subsequent Event [Line Items]
Cash consideration for acquisition \| $				$ 93.0