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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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=120397183&loc=d3e187085-122770

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- Definition

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

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- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Dividends (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended						9 Months Ended
	Feb. 04, 2021	Dec. 04, 2020	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019
Dividends Payable [Line Items]
Cash dividend paid (in dollars per share)		$ 0.3685
Dividends declared per common share (in dollars per share)			$ 0.3685			$ 0.3665			$ 1.1040	$ 1.0980
Cash dividend		$ 96.0	$ 96.0	$ 95.3	$ 90.4	$ 87.7	$ 87.3	$ 87.1
Subsequent Event
Dividends Payable [Line Items]
Dividends declared per common share (in dollars per share)	$ 0.39
Forecast
Dividends Payable [Line Items]
Cash dividend	$ 105.0